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Publications (5 of 5) Show all publications
Kores, C. C., Ismail, N., Geskus, D., Dijkstra, M., Bernhardi, E. H. & Pollnau, M. (2018). Spectral broadening in distributed-feedback resonators due to thermal chirp. In: Optics InfoBase Conference Papers: . Paper presented at Bragg Gratings, Photosensitivity and Poling in Glass Waveguides and Materials, BGPPM 2018, Zurich, Switzerland, 2 July 2018 through 5 July 2018. Optical Society of America
Open this publication in new window or tab >>Spectral broadening in distributed-feedback resonators due to thermal chirp
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2018 (English)In: Optics InfoBase Conference Papers, Optical Society of America, 2018Conference paper, Published paper (Refereed)
Abstract [en]

We investigate the spectral response of an unpumped distributed-feedback waveguide resonator, subject to thermal chirp. Experimental and simulated results indicate that such chirp causes an increase in outcoupling losses and, therefore, in the resonance linewidth.

Place, publisher, year, edition, pages
Optical Society of America, 2018
National Category
Other Engineering and Technologies
Identifiers
urn:nbn:se:kth:diva-238392 (URN)10.1364/BGPPM.2018.BTh3A.4 (DOI)2-s2.0-85051244033 (Scopus ID)9781557528209 (ISBN)
Conference
Bragg Gratings, Photosensitivity and Poling in Glass Waveguides and Materials, BGPPM 2018, Zurich, Switzerland, 2 July 2018 through 5 July 2018
Note

QC 20181108

Available from: 2018-11-08 Created: 2018-11-08 Last updated: 2018-11-08Bibliographically approved
Kores, C. C., Geskus, D., Pask, H. M. & Wetter, N. U. (2015). Diode side pumped, quasi-CW Nd:YVO4 self-Raman laser operating at 1176 nm. In: Progress in Biomedical Optics and Imaging - Proceedings of SPIE: . Paper presented at Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIV; San Francisco; United States; 9 February 2015 through 12 February 2015 (pp. 934718-1-934718-6).
Open this publication in new window or tab >>Diode side pumped, quasi-CW Nd:YVO4 self-Raman laser operating at 1176 nm
2015 (English)In: Progress in Biomedical Optics and Imaging - Proceedings of SPIE, 2015, p. 934718-1-934718-6Conference paper, Published paper (Refereed)
Abstract [en]

In this work we demonstrate for the first time, to the best of our knowledge, quasi-continuous wave (qcw) laser operation of a diode-side-pumped Nd:YVO<inf>4</inf> self-Raman laser operating at 1176 nm. The double beam mode controlling (DBMC) technique used in this work allows fundamental mode laser oscillation, resulting in a beam quality M2 of 2.42 and 2.18 in the horizontal and vertical directions, respectively. More than 3.5 W of peak output power at 1176 nm was achieved with TEM<inf>00</inf> laser mode, corresponding to an optical conversion efficiency of 5.4%. With multimode operation, more than 8W of peak output power was achieved, corresponding to 11.7% optical conversion efficiency.

Keywords
DBMC technique, Nd:YVO4, Raman lasers, Self-Raman Lasers, Side-pumped Raman Lasers
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-167369 (URN)10.1117/12.2077976 (DOI)000354360500028 ()2-s2.0-84928528271 (Scopus ID)9781628414370 (ISBN)
Conference
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIV; San Francisco; United States; 9 February 2015 through 12 February 2015
Note

QC 20150608

Available from: 2015-06-02 Created: 2015-05-22 Last updated: 2015-06-08Bibliographically approved
Kores, C. C., Jakutis-Neto, J., Geskus, D., Pask, H. M. & Wetter, N. U. (2015). Diode-side-pumped continuous wave Nd3+: YVO4 self-Raman laser at 1176 nm. Optics Letters, 40(15), 3524-3527
Open this publication in new window or tab >>Diode-side-pumped continuous wave Nd3+: YVO4 self-Raman laser at 1176 nm
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2015 (English)In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 40, no 15, p. 3524-3527Article in journal (Refereed) Published
Abstract [en]

Here we report, to the best of our knowledge, the first diode-side-pumped continuous wave (cw) Nd+3: YVO4 self-Raman laser operating at 1176 nm. The compact cavity design is based on the total internal reflection of the laser beam at the pumped side of the Nd+3: YVO4 crystal. Configurations with a single bounce and a double bounce of the laser beam at the pumped faced have been characterized, providing a quasi-cw peak output power of more than 8 W (multimode) with an optical conversion efficiency of 11.5% and 3.7 W (TEM00) having an optical conversion efficiency of 5.4%, respectively. Cw output power of 1.8 W has been demonstrated.

National Category
Other Physics Topics
Identifiers
urn:nbn:se:kth:diva-172705 (URN)10.1364/OL.40.003524 (DOI)000358802800023 ()26258348 (PubMedID)2-s2.0-84943178168 (Scopus ID)
Note

QC 20150831

Available from: 2015-08-31 Created: 2015-08-27 Last updated: 2017-12-04Bibliographically approved
Reijn, S.-M., Pinheiro, F. A., Geskus, D. & Wetter, N. U. (2015). Enabling focusing around the corner in multiple scattering media. Applied Optics, 54(25), 7740-7746
Open this publication in new window or tab >>Enabling focusing around the corner in multiple scattering media
2015 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 54, no 25, p. 7740-7746Article in journal (Refereed) Published
Abstract [en]

We report an alternative experimental setup to laterally focus light at an angle of 90 deg relative to turbid, multiple scattering media, using preprocessing wavefront shaping. We compare the measured image quality to one obtained in the usual configuration for focusing light through turbid media, where focusing occurs behind the scattering sample. We demonstrate that the depth of focus in the lateral configuration is of the same order of the usual transversal one because both setups are designed to operate in the deep Fresnel zone. This result shows that this novel, versatile lateral configuration allows for effectively focusing around corners through multiple scattering samples.

National Category
Other Physics Topics
Identifiers
urn:nbn:se:kth:diva-173761 (URN)10.1364/AO.54.007740 (DOI)000360344200037 ()2-s2.0-84942374401 (Scopus ID)
Note

QC 20150923

Available from: 2015-09-23 Created: 2015-09-18 Last updated: 2017-12-01Bibliographically approved
Geskus, D., Jakutis-Neto, J., Spence, D. J., Pask, H. M. & Wetter, N. U. (2015). Extreme Linewidth Broadening in a Nd:YLiF4-KGW Intracavity Raman Laser. In: : . Paper presented at CLEO/Europe-EQEC 2015, Conference on Lasers and Electro-Optics/Europe, 21-25 June, Munich, Germany.
Open this publication in new window or tab >>Extreme Linewidth Broadening in a Nd:YLiF4-KGW Intracavity Raman Laser
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2015 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Linewidth broadening of up to 4 nm of the fundamentaleld has been observed in a intracavity Nd:YLF-KGW Ramanlaser. Nine laser congurations have been analyzedto identify the responsible processes using a mathematicalmodel.

National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:kth:diva-165824 (URN)
Conference
CLEO/Europe-EQEC 2015, Conference on Lasers and Electro-Optics/Europe, 21-25 June, Munich, Germany
Note

QS 2015

Available from: 2015-04-29 Created: 2015-04-29 Last updated: 2015-04-30Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-7895-1808

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