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Publications (10 of 590) Show all publications
Lindberg, R., Bogusławski, J., Pasternak, I., Przewłoka, A., Laurell, F., Pasiskevicius, V. & Sotor, J. (2018). Mapping Mode-Locking Regimes in a Polarization-Maintaining Er-Doped Fiber Laser. IEEE Journal of Selected Topics in Quantum Electronics, 24(3), 1-9.
Open this publication in new window or tab >>Mapping Mode-Locking Regimes in a Polarization-Maintaining Er-Doped Fiber Laser
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2018 (English)In: IEEE Journal of Selected Topics in Quantum Electronics, ISSN 1077-260X, E-ISSN 1558-4542, Vol. 24, no 3, 1-9 p.Article in journal (Refereed) Published
Abstract [en]

We present the performance of an all polarization-maintaining Erbium-doped fiber laser mode-locked by a multilayer graphene based saturable absorber. The cavity incorporates a Martinez-type compressor, based on a transmission grating, which allows for continuous tuning of the net cavity dispersion as well as spectral filtering. By adjusting the dispersion and the spectral bandwidth, we could operate the laser in the soliton, the dispersion managed soliton and the absorber-limited pulse regimes. The pulse durations from the laser ranged between 338 fs to 2.1 ps and the laser could be operated at nearly constant output powers in the anomalous and the normal dispersion regimes. We also conducted stability analyses based on dispersive Fourier transform measurements in the different operating regimes. Comparison of the collected spectra reveals that the soliton regime had the best overall stability.

National Category
Atom and Molecular Physics and Optics
Research subject
Physics
Identifiers
urn:nbn:se:kth:diva-221176 (URN)10.1109/JSTQE.2017.2769057 (DOI)
Note

QC 20180116

Available from: 2018-01-15 Created: 2018-01-15 Last updated: 2018-01-16Bibliographically approved
Lindberg, R., Jakub, B., Abramski, K., Laurell, F., Pasiskevicius, V. & Jaroslaw, S. (2017). All Polarization-maintaining Er-doped Fiber Laser Modelocked by a Graphene Saturable Absorber Employing an Intra-cavity Compressor for Dispersion Management. In: : . Paper presented at Workshop on Specialty Optical Fiber and Their Applications. .
Open this publication in new window or tab >>All Polarization-maintaining Er-doped Fiber Laser Modelocked by a Graphene Saturable Absorber Employing an Intra-cavity Compressor for Dispersion Management
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2017 (English)Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

The performance of a stable dispersion tunable Erbium doped fiber laser modelocked by multi-layer graphene is presented and discussed. The cavity is based on all PM fibers and a free-space Martinez compressor.

Keyword
Ultrafast lasers, Fiber lasers, Pulse shaping
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-217100 (URN)
Conference
Workshop on Specialty Optical Fiber and Their Applications
Note

QC 20180110

Available from: 2017-10-31 Created: 2017-10-31 Last updated: 2018-01-10Bibliographically approved
Tian, J., Yang, Y., Qiu, M., Laurell, F., Pasiskevicius, V. & Jang, H. (2017). All-dielectric KTiOPO4 metasurfaces based on multipolar resonances in the terahertz region. Optics Express, 25(20), 24068-24080.
Open this publication in new window or tab >>All-dielectric KTiOPO4 metasurfaces based on multipolar resonances in the terahertz region
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2017 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 25, no 20, 24068-24080 p.Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Optical Society of America, 2017
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-216615 (URN)10.1364/OE.25.024068 (DOI)000412048500059 ()2-s2.0-85030469912 (Scopus ID)
Note

QC 20171110

Available from: 2017-11-10 Created: 2017-11-10 Last updated: 2017-11-29Bibliographically approved
Lobov, G. S., Marinins, A., Etcheverry, S., Zhao, Y., Vasileva, E., Sugunan, A., . . . Popov, S. (2017). Direct birefringence and transmission modulation via dynamic alignment of P3HT nanofibers in an advanced opto-fluidic component. Optical Materials Express, 7(1), 52-61.
Open this publication in new window or tab >>Direct birefringence and transmission modulation via dynamic alignment of P3HT nanofibers in an advanced opto-fluidic component
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2017 (English)In: Optical Materials Express, ISSN 2159-3930, E-ISSN 2159-3930, Vol. 7, no 1, 52-61 p.Article in journal (Refereed) Published
Abstract [en]

Poly-3-hexylthiophene (P3HT) nanofibers are semiconducting high-aspect ratio nanostructures with anisotropic absorption and birefringence properties found at different regions of the optical spectrum. In addition, P3HT nanofibers possess an ability to be aligned by an external electric field, while being dispersed in a liquid. In this manuscript we show that such collective ordering of nanofibers, similar to liquid crystal material, significantly changes the properties of transmitted light. With a specially fabricated opto-fluidic component, we monitored the phase and transmission modulation of light propagating through the solution of P3HT nanofibers, being placed in the electric field with strength up to 0.1 V/mu m. This report describes a technique for light modulation, which can be implemented in optical fiber-based devices or on-chip integrated components.

Place, publisher, year, edition, pages
Optical Society of America, 2017
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-202445 (URN)10.1364/OME.7.000052 (DOI)000392205600007 ()2-s2.0-85008157720 (Scopus ID)
Funder
Swedish Research Council, VR-SRL 2012-4421Swedish Research Council, VR-SRL 2013-6780Swedish Foundation for Strategic Research , EM11-0002
Note

QC 20170306

Available from: 2017-03-06 Created: 2017-03-06 Last updated: 2017-11-29Bibliographically approved
Etcheverry, S., Faridi, M. A., Ramachandraiah, H., Kumar, T., Margulis, W., Laurell, F. & Russom, A. (2017). High performance micro-flow cytometer based on optical fibres. Scientific Reports, 7, Article ID 5628.
Open this publication in new window or tab >>High performance micro-flow cytometer based on optical fibres
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2017 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, 5628Article in journal (Refereed) Published
Abstract [en]

Flow cytometry is currently the gold standard for analysis of cells in the medical laboratory and biomedical research. Fuelled by the need of point-of-care diagnosis, a significant effort has been made to miniaturize and reduce cost of flow cytometers. However, despite recent advances, current microsystems remain less versatile and much slower than their large-scale counterparts. In this work, an all-silica fibre microflow cytometer is presented that measures fluorescence and scattering from particles and cells. It integrates cell transport in circular capillaries and light delivery by optical fibres. Single-stream cell focusing is performed by Elasto-inertial microfluidics to guarantee accurate and sensitive detection. The capability of this technique is extended to high flow rates (up to 800 mu l/min), enabling a throughput of 2500 particles/s. The robust, portable and low-cost system described here could be the basis for a point-of-care flow cytometer with a performance comparable to commercial systems.

Place, publisher, year, edition, pages
Nature Publishing Group, 2017
National Category
Biological Sciences
Identifiers
urn:nbn:se:kth:diva-211606 (URN)10.1038/s41598-017-05843-7 (DOI)000405677200013 ()2-s2.0-85025168074 (Scopus ID)
Funder
Science for Life Laboratory - a national resource center for high-throughput molecular bioscienceSwedish Research CouncilKnut and Alice Wallenberg FoundationSwedish Childhood Cancer Foundation
Note

QC 20170814

Available from: 2017-08-14 Created: 2017-08-14 Last updated: 2017-10-17Bibliographically approved
Malmström, M., Tarasenko, O., Margulis, W. & Laurell, F. (2016). All-Fiber Nanosecond Gating for Time-Resolved Spectral Analysis. IEEE Photonics Technology Letters, 28(8), 829-832.
Open this publication in new window or tab >>All-Fiber Nanosecond Gating for Time-Resolved Spectral Analysis
2016 (English)In: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 28, no 8, 829-832 p.Article in journal (Refereed) Published
Abstract [en]

We demonstrate the addition of time gating to a standard optical spectrum analyzer (OSA) operating in the spectral region similar to 1.06 mu m. This is accomplished by opening for 7 ns the optical input to the OSA with an electrically driven poled fiber in a Sagnac loop. The sequential interrogation with nanosecond resolution of the reflection from three fiber Bragg gratings along a piece of fiber allows distinguishing the spectral peaks created with a minimum separation of 85 cm. The passive extinction ratio of this device is >40 dB and returns to >40 dB from >23 dB on a 35-ns time scale directly after time gating.

Keyword
Electrooptic modulation, spectral analysis, optical fiber devices
National Category
Other Physics Topics
Identifiers
urn:nbn:se:kth:diva-185339 (URN)10.1109/LPT.2015.2513739 (DOI)000372637700002 ()2-s2.0-84963593144 (Scopus ID)
Funder
Swedish Research CouncilKnut and Alice Wallenberg FoundationEU, FP7, Seventh Framework Programme, FP7-288786Carl Tryggers foundation
Note

QC 20160421

Available from: 2016-04-21 Created: 2016-04-18 Last updated: 2017-11-30Bibliographically approved
Liljestrand, C., Laurell, F. & Canalias, C. (2016). Ion-Exchange Induced Coercive Field Gratings for QPM Devices in Rb-doped KTP. In: 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO): . Paper presented at Conference on Lasers and Electro-Optics (CLEO), JUN 05-10, 2016, San Jose, CA. IEEE conference proceedings.
Open this publication in new window or tab >>Ion-Exchange Induced Coercive Field Gratings for QPM Devices in Rb-doped KTP
2016 (English)In: 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), IEEE conference proceedings, 2016Conference paper, Published paper (Refereed)
Abstract [en]

We demonstrate 3.16 mu m periodic poling in RKTP using a coercive field grating induced by ion-exchange. The process results in a linear refractive index change over the sample thickness, adding extra tunability to the QPM device.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2016
Series
Conference on Lasers and Electro-Optics, ISSN 2160-9020
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-201286 (URN)000391286401460 ()2-s2.0-85010689201 (Scopus ID)978-1-9435-8011-8 (ISBN)
Conference
Conference on Lasers and Electro-Optics (CLEO), JUN 05-10, 2016, San Jose, CA
Note

QC 20170215

Available from: 2017-02-15 Created: 2017-02-15 Last updated: 2017-02-15Bibliographically approved
Etcheverry, S., Faridi, A., Ramachandraiah, H., Margulis, W., Laurell, F. & Russom, A. (2016). Optofludics in microstructured fibers combining particle elasto-inertial focusing and fluorescence. In: 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO): . Paper presented at Conference on Lasers and Electro-Optics (CLEO), JUN 05-10, 2016, San Jose, CA. IEEE conference proceedings.
Open this publication in new window or tab >>Optofludics in microstructured fibers combining particle elasto-inertial focusing and fluorescence
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2016 (English)In: 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), IEEE conference proceedings, 2016Conference paper, Published paper (Refereed)
Abstract [en]

Optofluidics is exploited in an all-fiber component to detect and identify through fluorescence particles flowing at high rate and inertially focused in a capillary. The system represents a first step towards an in-fiber flow cytometer.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2016
Series
Conference on Lasers and Electro-Optics, ISSN 2160-9020
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-201282 (URN)000391286403491 ()2-s2.0-85010651492 (Scopus ID)978-1-9435-8011-8 (ISBN)
Conference
Conference on Lasers and Electro-Optics (CLEO), JUN 05-10, 2016, San Jose, CA
Note

QC 20170215

Available from: 2017-02-15 Created: 2017-02-15 Last updated: 2017-05-17Bibliographically approved
Wu, M.-H., Chiu, Y.-C., Wang, T.-D., Zhao, G., Zukauskas, A., Huang, Y.-C. & Laurell, F. (2016). Terahertz parametric amplification using KTiOPO4. In: 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO): . Paper presented at Conference on Lasers and Electro-Optics (CLEO), JUN 05-10, 2016, San Jose, CA. IEEE conference proceedings.
Open this publication in new window or tab >>Terahertz parametric amplification using KTiOPO4
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2016 (English)In: 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), IEEE conference proceedings, 2016Conference paper, Published paper (Refereed)
Abstract [en]

We show superior terahertz parametric generation from potassium titanyl phosphate over lithium niobate and lithium tantalate, and demonstrate seeded terahertz parametric amplification in KTP at 5.7 THz.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2016
Series
Conference on Lasers and Electro-Optics, ISSN 2160-9020
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-201289 (URN)000391286401297 ()2-s2.0-85010679777 (Scopus ID)978-1-9435-8011-8 (ISBN)
Conference
Conference on Lasers and Electro-Optics (CLEO), JUN 05-10, 2016, San Jose, CA
Note

QC 20170215

Available from: 2017-02-15 Created: 2017-02-15 Last updated: 2017-02-15Bibliographically approved
Wu, M.-H., Chiu, Y.-C., Wang, T.-D., Zhao, G., Zakauskas, A., Laurell, F. & Huang, Y.-C. (2016). Terahertz parametric generation and amplification from potassium titanyl phosphate in comparison with lithium niobate and lithium tantalate. Optics Express, 24(23), 25964-25973.
Open this publication in new window or tab >>Terahertz parametric generation and amplification from potassium titanyl phosphate in comparison with lithium niobate and lithium tantalate
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2016 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 24, no 23, 25964-25973 p.Article in journal (Refereed) Published
Abstract [en]

We report superior terahertz parametric generation from potassium titanyl phosphate (KTP) over congruent-grown lithium niobate (CLN) and lithium tantalate (CLT) in terms of parametric gain and laser damage resistance. Under the same pump and crystal configurations, the signal emerged first from KTP, 5% Mg-doped CLN, CLN, and then finally from CLT. The signal growth rate in KTP was comparable to that in 5%-Mg-doped CLN, but the signal power from KTP reached a much higher value after all the other crystals were damaged by the pump laser. We further demonstrate seeded terahertz parametric amplification in an edge-cut KTP at 5.74 THz. The THz parametric amplifier (TPA) employs a 17-mm long KTP gain crystal, pumped by a passively Q-switched pump laser at 1064 nm and seeded by a continuous-wave diode laser tuned to the signal wavelength at 1086.2 nm. With 5.8-mJ energy in a 520-ps pump pulse and 100-mW seed signal power, we measured 5W peak-power THz output from the KTP TPA with 22% pump depletion. In comparison, we measured no detectable THz output power from a similar edge-cut CLN TPA under the same pump power, detection scheme, and crystal configuration, when tuning the seed laser wavelength to 1072.2 nm and attempting to generate a radiation at 2.1 THz.

Place, publisher, year, edition, pages
Optical Society of America, 2016
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-198570 (URN)10.1364/OE.24.025964 (DOI)000388414600007 ()27857335 (PubMedID)
Note

QC 20161219

Available from: 2016-12-19 Created: 2016-12-19 Last updated: 2017-11-29Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-7688-1367

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