Design of chirped-coupling sidewall Bragg gratings for narrow linewidth distributed feedback lasers

Di Gaetano, E. and Sorel, M. (2019) Design of chirped-coupling sidewall Bragg gratings for narrow linewidth distributed feedback lasers. Optics Letters, 44(7), pp. 1642-1645. (doi:10.1364/OL.44.001642)

Di Gaetano, E. and Sorel, M. (2019) Design of chirped-coupling sidewall Bragg gratings for narrow linewidth distributed feedback lasers. Optics Letters, 44(7), pp. 1642-1645. (doi:10.1364/OL.44.001642)

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Abstract

A chirped-coupling sidewall Bragg grating is proposed to mitigate the nonlinear effects that deteriorate the linewidth in DFB lasers operating at a high power and current regime. This novel grating geometry is analyzed and simulated to extract the optimal design parameters in terms of intra-cavity field distribution. Compared to lasers with uniform Bragg gratings, devices fabricated with a chirped-coupling grating are shown to operate in stable single mode operation over a wider current and power range and exhibit linewidth as narrow as 100 kHz.

Item Type:Articles
Additional Information:Funding: Defence Science and Technology Laboratory (DSTL) (Grant DSTL, 1000094844).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Di Gaetano, Eugenio and Sorel, Professor Marc
Authors: Di Gaetano, E., and Sorel, M.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Optics Letters
Publisher:Optical Society of America
ISSN:0146-9592
ISSN (Online):1539-4794
Published Online:05 March 2019
Copyright Holders:Copyright © 2019 Optical Society of America
First Published:First published in Optics Letters 44(7): 1642-1645
Publisher Policy:Reproduced in accordance with the publisher copyright policy
Data DOI:10.5525/gla.researchdata.759

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