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  • 1.
    Armougom, J.
    et al.
    ONERA French Aerosp Lab, BP 80100, F-91123 Palaiseau, France..
    Melkonian, J. -M
    Dherbercourt, J. -B
    Raybaut, M.
    ONERA French Aerosp Lab, BP 80100, F-91123 Palaiseau, France..
    Godard, A.
    ONERA French Aerosp Lab, BP 80100, F-91123 Palaiseau, France..
    Coetzee, R. S.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Zukauskas, A.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Pasiskevicius, V.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    70 mJ single-frequency parametric source tunable between 1.87-1.93 mu m and 2.37-2.47 mu m for difference frequency generation in the LWIR2017Inngår i: 2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC), IEEE , 2017Konferansepaper (Fagfellevurdert)
  • 2. Armougom, J.
    et al.
    Melkonian, J. -M
    Dherbercourt, J. -B
    Raybaut, M.
    Godard, A.
    Coetzee, Riaan
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Zukauskas, Andrius
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    70 mJ single-frequency parametric source tunable between 1.87-1.93 μm and 2.37-2.47 μm for difference frequency generation in the LWIR2017Inngår i: Optics InfoBase Conference Papers, OSA - The Optical Society , 2017Konferansepaper (Fagfellevurdert)
  • 3. Armougom, J.
    et al.
    Melkonian, J. -M
    Raybaut, M.
    Dherbecourt, J. -B
    Godard, A.
    Cezard, N.
    Coetzee, Riaan Stuart
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Kadlcˇák, J.
    Standoff detection of hazardous chemicals using a longwave infrared parametric source2018Inngår i: Optics InfoBase Conference Papers, OSA - The Optical Society , 2018Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We report on a new longwave infrared optical parametric source, and its implementation for long range or medium range standoff detection of gaseous chemical warfare agents.

  • 4.
    Armougom, J.
    et al.
    France.
    Melkonian, J. -M
    France.
    Raybaut, M.
    France.
    Dherbecourt, J. -B
    France.
    Gorju, G.
    France.
    Godard, A.
    France.
    Coetzee, Riaan Stuart
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Fysik. KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Kadlcák, J.
    Czech republic.
    Longwave infrared lidar based on parametric sources for standoffdetection of gaseous chemicals2018Inngår i: Optics InfoBase Conference Papers, Optical Society of America, 2018Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We report on a longwave infrared lidar, tailored for detection of chemical warfare agents in the gaseous phase. The emitter is based on single-frequency 2 μm parametric oscillator/amplifier systems followed by a ZnGeP2 downconversion stage.

  • 5. Armougom, J.
    et al.
    Melkonian, J. -M
    Raybaut, M.
    Dherbecourt, J. -B
    Gorju, G.
    Godard, A.
    Cotzee, Riaan
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Kadlcak, J.
    Longwave Infrared Lidar Based on Parametric Sources for Standoff Detection of Gaseous Chemicals2018Inngår i: 2018 Conference on Lasers and Electro-Optics, CLEO 2018 - Proceedings, Institute of Electrical and Electronics Engineers (IEEE), 2018, artikkel-id 8426308Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We report on a longwave infrared lidar, tailored for detection of chemical warfare agents in the gaseous phase. The emitter is based on single-frequency 2 μm parametric oscillator/amplifier systems followed by a ZnGeP2 downconversion stage.

  • 6. Armougom, J.
    et al.
    Melkonian, J-M.
    Raybaut, M.
    Dherbecourt, J-B
    Gorju, G.
    Godard, A.
    Coetzee, Riaan
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Kadlcak, J
    7.3-10.5 µm Tunable Single-frequency Parametric Source for Standoff Detection of Gaseous Chemicals2018Inngår i: Optics InfoBase Conference Papers, Optics Info Base, Optical Society of America, 2018Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We report on the first single-frequency parametric source tunable in the longwave infrared with an output energy of 1 mJ. The source is then used in a lidar to detect chemicals in the vapor phase.

  • 7. Bach, Florian
    et al.
    Mero, Mark
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Zukauskas, Andrius
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Petrov, Valentin
    High repetition rate, femtosecond and picosecond laser induced damage thresholds of Rb:KTiOPO4 at 1.03 mu m2017Inngår i: Optical Materials Express, ISSN 2159-3930, E-ISSN 2159-3930, Vol. 7, nr 3, s. 744-750Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A laser-induced damage study is performed on blank, uncoated Rb:KTiOPO4 (RKTP) samples at 1.03 mu m with two different pulse durations of similar to 0.3 and similar to 1.0 ps and a repetition rate of 100 kHz. The effect of the sample temperature is also considered.

  • 8. Baek, I. H.
    et al.
    Choi, S. Y.
    Lee, H. W.
    Cho, W. B.
    Petrov, V.
    Agnesi, A.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Yeom, D. -I
    Kim, K.
    Hong, B. H.
    Rotermund, F.
    Passive mode-locking of a Ti: Sapphire laser using low-dimensional carbon nanostructures2011Inngår i: Int. Quantum Electron. Conf., IQEC Conf. Lasers Electro-Opt., CLEO Pac. Rim. Incorporating Australas. Conf. Opt., Lasers Spec, 2011, s. 1154-1155Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We report on passive mode-locking of a Ti:sapphire laser employing novel saturable absorbers based on low-dimensional carbon nanostructures such as single-walled carbon nanotubes and monolayer graphene. The mode-locked operation with both saturable absorbers were characterized and compared to pure Kerr-lens mode-locking.

  • 9. Baek, In Hyung
    et al.
    Choi, Sun Young
    Lee, Hwang Woon
    Cho, Won Bae
    Petrov, Valentin
    Agnesi, Antonio
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Yeom, Dong-Il
    Kim, Kihong
    Rotermund, Fabian
    Single-walled carbon nanotube saturable absorber assisted high-power mode-locking of a Ti:sapphire laser2011Inngår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 19, nr 8, s. 7833-7838Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We report on passive mode-locking of a Ti:sapphire laser employing a single-walled carbon nanotube saturable absorber (SWCNT-SA) specially designed and fabricated for wavelengths near 800 nm. Mode-locked pulses as short as 62 fs were generated at a repetition rate of 99.4 MHz. We achieved output powers from the SWCNT-SA mode-locked laser as high as 600 mW with a slope efficiency of 26%. The characteristics of SWCNT-SA-assisted mode-locking were compared with those of Kerr-lens mode-locking without SWCNT-SA.

  • 10. Bertani, Stefano
    et al.
    Jacobsson, Bjorn
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Stjernström, Mårten
    KTH, Skolan för kemivetenskap (CHE), Kemi, Analytisk kemi (stängd 20110630).
    Stretching-tunable external-cavity laser locked by an elastic silicone grating2006Inngår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 14, nr 25, s. 11982-11986Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We demonstrate wavelength locking of a diode laser at 760 nm with feedback from an elastic transmission grating in the Littrow configuration. The laser was in a single longitudinal mode with a side-mode suppression of 20 dB. By stretching the grating the laser could be tuned over a few nm. The grating was fabricated in a silicone elastomer ( polydimethylsiloxane) by a moulding technique, and coated by a thin layer of Ti and Au to achieve an increased diffraction efficiency needed for efficient locking.

  • 11.
    Bjurshagen, Stefan
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Brynolfsson, Patrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Parreu, I.
    Pujol, M. C.
    Peña, A.
    Aguiló, M.
    Díaz, F.
    Crystal growth, spectroscopic characterization, and eye-safe laser operation of erbium- And ytterbium-codoped KLu(WO4)22008Inngår i: Applied Optics, ISSN 1559-128X, Vol. 47, nr 5, s. 656-665Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Erbium (Er)- and Ytterbium (Yb)-codoped monoclinic KLu(WO4) 2 single crystals were grown by top seeded solution growth-slow cooling method for several different doping concentrations. Growth parameters have been optimized to obtain macrodefect-free single crystals. Er energy levels involved in the 4I13/2 → 4I 15/2 were determined by 6 K polarized optical absorption. The maximum emission cross section for this electronic transition has been evaluated, being 2.85 × 10-20 cm2 for E||Nm at 1535 nm. Laser oscillation in the 1.5 μm range was obtained by pumping the Yb ion at 980 nm and sensitizing Er. The maximum output power achieved was 152 mW, with 1.2% slope efficiency.

  • 12.
    Bjurshagen, Stefan
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Hellström, Jonas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pujol, Maria
    Fisica I Cristal-Lografia de Materials (FiCMA), Universitat Rovira I Virgili, Spain.
    Aguiló, Magdalena
    Fisica I Cristal-Lografia de Materials (FiCMA), Universitat Rovira I Virgili, Spain.
    Díaz, Francesc
    Fisica I Cristal-Lografia de Materials (FiCMA), Universitat Rovira I Virgili, Spain.
    Fluorescence dynamics and rate equations analysis in Er3+,Yb3+ doped double tungstates2006Inngår i: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 45, nr 19, s. 4715-4725Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The fluorescence dynamics in Er3+ and Yb3+ doped KGd(WO4)(2) and KY(WO4)(2) has been investigated. Lifetimes have been measured for the Yb(F-2(5/2)), Er(I-4(13/2)), and Er(S-4(3/2)) levels around 1, 1.5, and 0.55 mu m, respectively. The Yb(F-2(5/2)) lifetimes show a decreasing trend toward the limiting Er(I-4(11/2)) lifetime with increasing Er-to-Yb concentration ratio, whereas the Er(I-4(13/2)) lifetimes are mostly unaffected by the doping concentrations. A rate equation analysis has been performed to explain the observed behavior and gain is calculated for a continuous-wave laser at 1.53 mu m to find the optimum doping concentrations for high gain.

  • 13.
    Bjurshagen, Stefan
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Parreu, I.
    University of Tarragona.
    Pujol, M. C.
    University of Tarragona.
    Aguiló, M.
    University of Tarragona.
    Diaz, Francesc
    University of Tarragona.
    Crystal Growth, Spectroscopic Characterisation and Eye-Safe Laser Operation of Er and Yb Doped KLu(WO4)22008Konferansepaper (Fagfellevurdert)
    Abstract [en]

    High quality Er:Yb:KLu(WO4)2have been grown using TSSG method and spectroscopically investigated . The laser performance is compared with that in Er:Yb:KY(WO4)2. Role of upconversion processes and optimum doping concentrations have been estimated.

  • 14. Bolanos, Western
    et al.
    Carvajal, Joan J.
    Mateos, Xavier
    Cinta Pujol, Maria
    Thilmann, Nicky
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Lifante, Gines
    Aguilo, Magdalena
    Diaz, Francesc
    Epitaxial layers of KY1-x-yGdxLuy(WO4)(2) doped with Er3+ and Tm3+ for planar waveguide lasers2010Inngår i: Optical materials (Amsterdam), ISSN 0925-3467, E-ISSN 1873-1252, Vol. 32, nr 3, s. 469-474Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Here we show the results we obtained in the fabrication of planar wave guide lasers based on monoclinic double tungstates doped with Er3+ and Tm3+. We have successfully introduced these ions into the lattice matched KY0.59Gd0.19Lu0.22(WO4)(2) epitaxial layers grown on KY(WO4)(2) substrates without loss of optical quality and keeping a high refractive index contrast between the epitaxial layer and the substrate. We characterized the waveguiding properties of these epitaxial layers at lambda = 632.8 nm by dark modes spectroscopy, and we showed that these waveguides can support several TE and TM modes. Spectroscopic characterization of the active lanthanide ions in these crystals is also presented.

  • 15. Bolaños, W.
    et al.
    Carvajal, J.J.
    Mateos, X.
    Pujol, M.C.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Thilmann, Nicky
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Aguiló, M.
    Díaz, F.
    Fabrication and characterization of epitaxial layers of the KY1-x-yGdxLuy(WO4)2 system for waveguide lasers2009Konferansepaper (Fagfellevurdert)
  • 16. Boyko, A. A.
    et al.
    Kostyukova, N. Y.
    Badikov, V.
    Badikov, D.
    Panyutin, V.
    Shevyrdyaeva, G.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Zukauskas, Andrius
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Marchev, G. M.
    Kolker, D. B.
    Petrov, V.
    Intracavity difference-frequency mixing of OPO signal and idler pulses in BaGa4Se72017Inngår i: Optics InfoBase Conference Papers, Optical Society of America, 2017, Vol. Part F41Konferansepaper (Fagfellevurdert)
    Abstract [en]

    An overall quantum conversion efficiency of 7.8% is achieved by intracavity mixing the signal and idler of a 1.064-μm pumped Rb:PPKTP OPO in BaGa4Se7, generating >0.7 mJ pulse energy at ~7 μm and 100 Hz.

  • 17. Boyko, A. A.
    et al.
    Marchev, G. M.
    Petrov, V.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Kolker, D. B.
    Zukauskas, Andrius
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Kostyukova, N. Y.
    Intracavity-pumped, cascaded AgGaSe2 optical parametric oscillator tunable up to 18 μm2016Inngår i: Optics InfoBase Conference Papers, OSA - The Optical Society , 2016Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We report on a AgGaSe2 optical parametric oscillator (OPO), intracavity pumped by the 1.85-μm signal pulses of a 1.064-μm pumped Rb:PPKTP OPO. It operates at 100 Hz with idler tunability from ~8 to 18 μm. 

  • 18. Boyko, A. A.
    et al.
    Marchev, G. M.
    Petrov, V.
    Pasiskevicius, Valdus
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Kolker, D. B.
    Zukauskas, Andrius
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Kostyukova, N. Y.
    Intracavity-pumped, cascaded Mid-IR optical parametric oscillator based on AgGaSe22015Inngår i: Advanced Solid State Lasers, ASSL 2015, Optical Society of America, 2015Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We report on an AgGaSe2 optical parametric oscillator (OPO), intracavity pumped by the 1.85-μm signal pulses from a 1.064-μm pumped Rb:PPKTP OPO. It operates at 100 Hz with idler tunability from 5.8 to 8.3 μm.

  • 19. Boyko, A.
    et al.
    Badikov, V.
    Shevyrdyaeva, G.
    Badikov, D.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Zukauskas, Andrius
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Petrov, V.
    Intracavity-pumped, cascaded optical parametric oscillator based on BaGa2GeSe62018Inngår i: Optics InfoBase Conference Papers, Optics Info Base, Optical Society of America, 2018Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We employ the new chalcogenide crystal BaGa2GeSe6 for the first time for frequency down-conversion into the mid-IR, in an optical parametric oscillator (OPO), intracavity pumped by the signal wave of a 1.064-μm pumped Rb:PPKTP OPO. .

  • 20. Boyko, A.
    et al.
    Kostyukova, N.
    Guha, S.
    Schunemann, P. G.
    Marchev, G.
    Panyutin, V.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Kolker, D.
    Zukauskas, Andrius
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Petrov, V.
    Rb: PPKTP optical parametric oscillator with intracavity difference- frequency generation in temperature-tuned OPGaAs2017Inngår i: Optics InfoBase Conference Papers, OSA - The Optical Society , 2017Konferansepaper (Fagfellevurdert)
  • 21. Boyko, Andrey A.
    et al.
    Kostyukova, Nadezhda Y.
    Badikov, Valeriy
    Badikov, Dmitrii
    Panyutin, Vladimir
    Shevyrdyaeva, Galina
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Zukauskas, Andrius
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Marchev, Georgi M.
    Kolker, Dmitry B.
    Petrov, Valentin
    Intracavity difference-frequency mixing of optical parametric oscillator signal and idler pulses in BaGa4Se72017Inngår i: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 56, nr 10, s. 2783-2786Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    An overall quantum conversion efficiency of 7.8% is achieved by intracavity mixing the signal and idler of a 1.064 mu m pumped Rb: PPKTP optical parametric oscillator in BaGa4Se7. In this way, a pulse energy of similar to 0.71 mJ is generated at similar to 7 mu m for a repetition rate of 100 Hz. Tuning of the mid-IR radiation is demonstrated by heating of the Rb: PPKTP crystal.

  • 22. Boyko, Andrey A.
    et al.
    Kostyukova, Nadezhda Y.
    Marchev, Georgi M.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Kolker, Dmitry B.
    Zukauskas, Andrius
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Petrov, Valentin
    Rb:PPKTP optical parametric oscillator with intracavity difference-frequency generation in AgGaSe22016Inngår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 41, nr 12, s. 2791-2794Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A 1.064 mu m pumped Rb:PPKTP optical parametric oscillator (OPO) generates mid-IR radiation by intracavity mixing the resonant signal and idler waves in AgGaSe2. The similar to 6 ns pulses at similar to 7 mu m have an energy of 670 mu J at 100 Hz, equivalent to an average power of 67 mW. The overall quantum conversion efficiency from 1.064 mu m amounts to 8%, and the power conversion efficiency is 1.2%.

  • 23. Boyko, Andrey A.
    et al.
    Marchev, Georgi M.
    Petrov, Valentin
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Kolker, Dmitry B.
    Zukauskas, Andrius
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Kostyukova, Nadezhda Y.
    Intracavity-pumped, cascaded AgGaSe2 optical parametric oscillator tunable from 5.8 to 18 mu m2015Inngår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 23, nr 26, s. 33460-33465Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A AgGaSe2 nonlinear crystal placed in a coupled cavity is intracavity pumped by the similar to 1.85-mu m signal pulses of a 1.064-mu m pumped Rb: PPKTP doubly-resonant optical parametric oscillator (OPO) operating at a repetition rate of 100 Hz. Using two samples cut for type-I and II phase-matching, the overall idler tunability of the singly-resonant AgGeSe2 OPO covers an unprecedented spectral range from 5.8 to similar to 18 mu m in the mid-IR.

  • 24. Boyko, Andrey A.
    et al.
    Schunemann, Peter G.
    Guha, Shekhar
    Kostyukova, Nadezhda Y.
    Kolker, Dmitry B.
    Panyutin, Vladimir L.
    Marchev, Georgi M.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Zukauskas, Andrius
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Mayorov, Fedor
    Petrov, Valentin
    Optical parametric oscillator pumped at similar to 1 mu m with intracavity mid-IR difference-frequency generation in OPGaAs2018Inngår i: Optical Materials Express, ISSN 2159-3930, E-ISSN 2159-3930, Vol. 8, nr 3, s. 549-554Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Intracavity difference-frequency generation (DFG) between signal and idler pulses is investigated in orientation-patterned GaAs inside the cavity of a similar to 1 mu m pumped nanosecond optical parametric oscillator (OPO). Using two different samples and temperature tuning in the non-critical configuration, tunability between 7 and 9.2 mu m is demonstrated. The superior thermo-mechanical properties of OPGaAs enabled also for the first time operation of this cascaded scheme at kilohertz (1-3 kHz) repetition rates reaching average powers similar to 10 mW in the mid-IR.

  • 25.
    Boyko, Andrey
    et al.
    Max Born Inst Nonlinear Opt & Short Pulse Spect, Max Born Str 2a, D-12489 Berlin, Germany.;Novosibirsk State Univ, Res Lab Quantum Opt Technol, 2 Pirogova Str, Novosibirsk 630090, Russia.;Special Technol Ltd, 1-3 Zeljonaja Gorka Str, Novosibirsk 630060, Russia..
    Kostyukova, Nadezhda
    Max Born Inst Nonlinear Opt & Short Pulse Spect, Max Born Str 2a, D-12489 Berlin, Germany.;Novosibirsk State Univ, Res Lab Quantum Opt Technol, 2 Pirogova Str, Novosibirsk 630090, Russia.;Special Technol Ltd, 1-3 Zeljonaja Gorka Str, Novosibirsk 630060, Russia..
    Guha, Shekhar
    Air Force Res Lab, Mat & Mfg Directorate, Denton, OH 45433 USA..
    Schunemann, Peter G.
    BAE Syst Inc, MER15-1813,POB 868, Nashua, NH 03061 USA..
    Marchev, Georgi
    Max Born Inst Nonlinear Opt & Short Pulse Spect, Max Born Str 2a, D-12489 Berlin, Germany..
    Panyutin, Vladimir
    Max Born Inst Nonlinear Opt & Short Pulse Spect, Max Born Str 2a, D-12489 Berlin, Germany..
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Kolker, Dmitry
    Novosibirsk State Univ, Res Lab Quantum Opt Technol, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Zukauskas, Andrius
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Petrov, Valentin
    Max Born Inst Nonlinear Opt & Short Pulse Spect, Max Born Str 2a, D-12489 Berlin, Germany..
    Rb:PPKTP Optical Parametric Oscillator with Intracavity Difference-Frequency Generation in Temperature-Tuned OPGaAs2017Inngår i: 2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC), IEEE , 2017Konferansepaper (Fagfellevurdert)
  • 26. Budriunas, R.
    et al.
    Kucˇinskas, D.
    Stanislauskas, T.
    Gadonas, D.
    Viotti, Anne-Lise
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Zukauskas, Andrius
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Varanavicˇius, A.
    Broadband noncollinear optical parametric amplification in GaSe pumped at 1.5μm2018Inngår i: Optics InfoBase Conference Papers, OSA - The Optical Society , 2018Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We demonstrate broadband parametric amplification in GaSe crystal in noncollinear geometry. Seed pulses spanning 1.5-2.6μm are produced by cascaded χ(2) nonlinearity in a periodically poled Rb:KTP crystal. Amplified pulse bandwidths supporting 10-15fs transformlimited pulse durations at ~2μm central wavelength are achieved.

  • 27. Campbell, S.
    et al.
    Thomson, R. R.
    Hand, D. P.
    Kar, A. K.
    Reid, D. T.
    Canalias, Carlota
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Frequency-doubling in femtosecond laser inscribed periodically-poled potassium titanyl phosphate waveguides2007Inngår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 15, nr 25, s. 17146-17150Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Frequency doubling has been achieved in femtosecond-laser-inscribed single-mode waveguides written in two periodically-poled potassium titanyl phosphate crystals. A conversion efficiency of 0.22 %W-1 was obtained for first-order quasi-phase matching at 980 nm and an efficiency of 0.02 %W-1 for third-order quasi-phase matching at 800 nm.

  • 28.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Hirohashi, Junji
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Polarization switching characteristics of flux grown KTiOPO4 and RbTiOPO4 at room temperature2005Inngår i: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 97, nr 12, s. 124105-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A study of polarization-switching characteristics under an applied electrical field at room temperature is presented for flux-grown KTiOPO4 and RbTiOPO4. By optimizing the experimental conditions, we determined the coercive field and the domain-switching time quantitatively by direct observation of the switching current. For both isomorphs, the inverse of the polarization-switching time, 1/t(s), follows an exponential dependence on the applied field E in low-field regime, and a linear dependence on E in the high-field regime. Domain morphology of KTiOPO4 based on selective etching reveals laminar structures elongated in the b crystallographic direction. An estimation of the domain-wall velocity shows that the domain speed in the polar direction is, at least, two orders of magnitude larger than in the a-b plane. The velocity along the b direction is similar to 30 times larger than along the a axis.

  • 29.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Nordlöf, Mats
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    A KTiOPO4 nonlinear photonic crystal for blue second harmonic generation2009Inngår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 94, nr 8Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A nonlinear photonic crystal with a rectangular domain lattice of 6.09x6 mu m(2) has been fabricated and characterized in flux-grown KTiOPO4. It was used to demonstrate continuous-wave and multiple beam tunable blue second harmonic generation.

  • 30.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Nordlöf, Mats
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Two-Dimensional Nonlinear Photonic Crystal in KTiOPO4 for CW Second Harmonic Blue Light Generation2007Inngår i: 2007 CONFERENCE ON LASERS & ELECTRO-OPTICS/QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE (CLEO/QELS 2007), NEW YORK: IEEE , 2007, s. 404-405Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We report on fabrication and characterization of a nonlinear photonic crystal with a rectangular lattice in a KTiOPO4 crystal. The structure was used to demonstrate CW tunable second harmonic generation in the blue regime.

  • 31.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Counter-Propagating QPM Parametric Interactions: A Mirrorless OPO in sub-µm Periodically Poled KTiOPO42007Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We report on the first experimental demonstration of mirrorless optical parametric oscillation. The counter-propagating idler and signal oscillate without an external cavity in a sub-µm periodically poled KTiOPO4 crystal, reaching an efficiency of 16.5%.

  • 32.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Mirrorless optical parametric oscillator2007Inngår i: Nature Photonics, ISSN 1749-4885, Vol. 1, nr 8, s. 459-462Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Parametric interaction of counterpropagating photons has the unique property of automatically establishing distributed feedback and thus realizing novel sources of coherent and tunable radiation, such as mirrorless optical parametric oscillators. This device does not require alignment or any optical components other than the second-order nonlinear medium itself(1). Here we present the first experimental demonstration of such an oscillator, which was made feasible by quasi phase-matching in a nonlinear photonic structure with submicrometre periodicity. This type of oscillator has been extensively discussed as a theoretical possibility(1-5). It generates signal and idler waves in the near- and mid-infrared, respectively, and exhibits unique and useful spectral properties. The oscillator signal is essentially a wavelength-shifted replica of the pump spectrum, and the bandwidth of the idler is two orders of magnitude narrower than that of the pump. It also has very low output wavelength sensitivity to temperature variations.

  • 33.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Clemens, R.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Sub-micronperiodically poled flux grown KTiOPO4 for optical applications2003Konferansepaper (Fagfellevurdert)
  • 34.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Clemens, R.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Sub-micronperiodically poled flux-grown KTiOPO4 for optical applications2003Konferansepaper (Fagfellevurdert)
  • 35.
    Canalias, Carlota
    et al.
    KTH, Tidigare Institutioner, Fysik.
    Pasiskevicius, Valdas
    KTH, Tidigare Institutioner, Fysik.
    Clemens, Rosalie
    KTH, Tidigare Institutioner, Fysik.
    Laurell, Fredrik
    KTH, Tidigare Institutioner, Fysik.
    Submicron periodically poled flux-grown KTiOPO42003Inngår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 82, nr 24, s. 4233-4235Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A submicron domain grating has been created in a bulk ferroelectric. Electron-beam lithography and electric-field poling were used to fabricate the 800 nm period grating in a 0.5-mm-thick flux-grown KTiOPO4 sample. The domain structure was characterized with an atomic force microscope and was used to demonstrate electrically amplitude adjustable Bragg reflections.

  • 36.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Fokine, Michael
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Backward quasi phase matched second harmonic generation in sub-micron periodically poled KTiOPO42006Inngår i: CLEO/QELS 2006, Optical Society of America, 2006Konferansepaper (Fagfellevurdert)
    Abstract [en]

    1mm thick KTiOPO4 was poled with 720nm domain period by employing UVlithography, chemical patterning and electric field poling. The structure was used to demonstrate 6 and 7 order quasi-phase matched backward second harmonic generation.

  • 37.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Fokine, Michael
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Backward quasi phase matched second harmonic generation in sub-micron periodically poled KTiOPO42005Inngår i: 2005 Conference on Lasers & Electro-Optics (CLEO), Vols 1-3, WASHINGTON: OPTICAL SOC AMERICA , 2005, s. 2264-2266Konferansepaper (Fagfellevurdert)
    Abstract [en]

    1mm thick KTiOPO4 was poled with 720nm domain period by employing UV-lithography, chemical patterning and electric field poling. The structure was used to demonstrate 6 and 7 order quasi-phase matched backward second harmonic generation.

  • 38.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Fokine, Michael
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Backward quasi-phase-matched second-harmonic generation in submicrometer periodically poled flux-grown KTiOPO42005Inngår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 86, nr 18, s. 181105-1-181105-3Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A 1 turn thick flux-grown KTiOPO4 sample was poled with a 720 nm domain period by employing deep-UV laser lithography, chemical patterning, and electric field poling. An atomic force microscope was used to characterize the periodic domain structure. The sample was used to demonstrate sixth and seventh order quasi-phase-matched backward second-harmonic generation.

  • 39.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Fokine, Michael
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Progress in Sub-Micrometer Periodicity of Quasi-Phase Matching Structures2009Inngår i: 2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum Electronics and Laser Science Conference, CLEO/QELS 2009, IEEE , 2009, s. 906-907Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We report on the progress in fabrication of sub-micrometer ferroelectric domain gratings in KTiOPO4. Periods as short as 565 nm have been created in the bulk of the crystal by electric-filed poling.

  • 40.
    Canalias, Carlota
    et al.
    KTH, Tidigare Institutioner, Fysik.
    Pasiskevicius, Valdas
    KTH, Tidigare Institutioner, Fysik.
    Fragemann, Anna
    KTH, Tidigare Institutioner, Fysik.
    Laurell, Fredrik
    KTH, Tidigare Institutioner, Fysik.
    High-resolution domain imaging on the nonpolar y-face of periodically poled KTiOPO4 by means of atomic force microscopy2003Inngår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 83, nr 4, s. 734-736Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The inverse piezoelectric effect is used to produce high-resolution images of ferroelectric domains in periodically poled KTiOPO4 crystals on their nonpolar y-face using atomic force microscopy. We demonstrate that the technique is convenient for studying the nucleation and growth of domains in a periodically poled KTiOPO4 sample.

  • 41.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Advances in KTP-Family Materials2007Konferansepaper (Fagfellevurdert)
  • 42.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Fysik.
    Periodic poling of KTiOPO4: From micrometer to sub-micrometer domain gratings2006Inngår i: Ferroelectrics (Print), ISSN 0015-0193, E-ISSN 1563-5112, Vol. 340, nr 1, s. 27-47Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Some novel techniques to do periodic poling of KTP are described. Emphasis on ways to avoid domain broadening and merging of domains is presented with reference to the original properties of flux grown KTP. For sub-Am structures E-beam lithography and deep UV-laser lithography were used to pattern the samples, and chemical process to promote selective poling to obtain high quality domain gratings in up to 1 mm thick samples.

  • 43.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Periodical domains gratings go nano2009Konferansepaper (Fagfellevurdert)
  • 44.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Sub-µmperiodically poled KTiOPO42009Konferansepaper (Fagfellevurdert)
  • 45.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Grilli, Simonetta
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    De Natale, P.
    Ferraro, P.
    In situ visualization of domain kinetics in flux grown KTiOPO4 by digital holography2007Inngår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 102, nr 6, s. 064105-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The fast dynamic evolution of ferroelectric domains during electric field poling in flux grown KTiOPO4 crystals was investigated online by a digital holography based technique. The dependence of the ferroelectric domain kinetics on the electric field temporal wave form and poling history was studied. High-speed imaging by means of a complementary metal-oxide-semiconductor image sensor camera allowed in situ measurement of the domain wall propagation speed under different poling conditions. The results also give evidence of the strong influence of the dielectric surface layer in this material.

  • 46.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Nordlöf, M.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Domain engineering in KTiOPO4: from periodic poling to self-assembled2007Konferansepaper (Fagfellevurdert)
  • 47.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Strömqvist, Gustav
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Mirrorless optical parametric oscillators2010Inngår i: Nonlinear Photonics (NP) 2010, 2010Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We present the experimental implementation of a mirrorless optical parametric oscillator based on sub-μm periodically poled KTiOPO4. The poling process for sub-μm gratings and the unique properties of the device will be discussed.

  • 48.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Wang, Shunhua
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Nucleation and growth of periodic domains during electric field poling in flux-grown KTiOPO4 observed by atomic force microscopy2006Inngår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 88, nr 3, s. 032905-1-032905-3Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The domain structure of periodically poled KTiOPO4 crystals were studied on both the polar and nonpolar faces utilizing a voltage-modulated atomic force microscope. The measurements give information of domain nucleation, growth, and merging. Two different kind of overpoling behaviors have been observed depending on the magnitude of the applied field.

  • 49.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Zukauskas, Andrius
    Liljestrand, Charlotte
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Advances in QPM Devices Based on KTP Isomorphs2013Konferansepaper (Fagfellevurdert)
  • 50.
    Canalias, Carlota
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Zukauskas, Andrius
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Liljestrand, Charlotte
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Sub-wavelength domain engineering in KTP isomorphs: QPM devices with counter-propagating photons2013Inngår i: 2013 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR), New York: IEEE , 2013, s. 6600156-Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We review the recent advances in fabrication of ferroelectric-domain gratings of sub-μm periodicity in KTP and Rb-doped KTP for counter-propagating second-order nonlinear optical interactions. Their performance as QPM devices will be discussed.

1234567 1 - 50 of 489
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