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Temperature dependence of spectral characteristics of distributed feedback resonators
Author(s): C. C. Kores; N. Ismail; D. Geskus; M. Dijkstra; E. H. Bernhardi; M. Pollnau
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Paper Abstract

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.

Paper Details

Date Published: 17 May 2018
PDF: 6 pages
Proc. SPIE 10683, Fiber Lasers and Glass Photonics: Materials through Applications, 106830B (17 May 2018); doi: 10.1117/12.2307023
Show Author Affiliations
C. C. Kores, KTH Royal Institute of Technology (Sweden)
N. Ismail, KTH Royal Institute of Technology (Sweden)
D. Geskus, KTH Royal Institute of Technology (Sweden)
M. Dijkstra, Univ. Twente (Netherlands)
E. H. Bernhardi, KTH Royal Institute of Technology (Sweden)
M. Pollnau, KTH-Royal Institute of Technology (Sweden)
Univ. of Surrey (United Kingdom)


Published in SPIE Proceedings Vol. 10683:
Fiber Lasers and Glass Photonics: Materials through Applications
Stefano Taccheo; Jacob I. Mackenzie; Maurizio Ferrari, Editor(s)

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