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Temperature Dependence of Spectral Characteristics of Distributed-Feedback Resonators
KTH, School of Engineering Sciences (SCI), Applied Physics, Laser Physics.
KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
Univ Twente, MESA Inst, Opt Sci, NL-7500 AE Enschede, Netherlands..
Show others and affiliations
2018 (English)In: FIBER LASERS AND GLASS PHOTONICS: MATERIALS THROUGH APPLICATIONS / [ed] Taccheo, S Mackenzie, JI Ferrari, M, SPIE-INT SOC OPTICAL ENGINEERING , 2018, article id 106830BConference paper, Published paper (Refereed)
Abstract [en]

The spectral response of a distributed-feedback resonator with a thermal chirp is investigated. An Al2O3 channel waveguide with a surface Bragg grating inscribed into its SiO2 top cladding is studied. A linear temperature gradient along the resonator leads to a corresponding variation of the grating period. We characterize its spectral response with respect to wavelength and linewidth changes of the resonance peak. Simulated results show good agreement with the experimental data, indicating that the resonance wavelength is determined by the total accumulated phase shift. The calculated grating reflectivities at the resonance wavelength largely explain the observed changes of the resonance linewidth. This agreement demonstrates that the linewidth increase is caused by the increase of resonator outcoupling losses.

Place, publisher, year, edition, pages
SPIE-INT SOC OPTICAL ENGINEERING , 2018. article id 106830B
Series
Proceedings of SPIE, ISSN 0277-786X ; 10683
Keywords [en]
Distributed-feedback laser, Bragg grating, Thermal grating chirp, Resonance wavelength, Resonance linewidth
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-240042DOI: 10.1117/12.2307023ISI: 000450857500009Scopus ID: 2-s2.0-85049793405ISBN: 978-1-5106-1893-0 (print)OAI: oai:DiVA.org:kth-240042DiVA, id: diva2:1269231
Conference
Conference on Fiber Lasers and Glass Photonics - Materials through Applications, APR 22-26, 2018, Strasbourg, FRANCE
Note

QC 20181210

Available from: 2018-12-10 Created: 2018-12-10 Last updated: 2019-06-18Bibliographically approved

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Pollnau, Markus

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