NDLI: Theoretical study on linewidth characteristics of SGDBR lasers for coherent optical communications

Content Provider	IEEE Xplore Digital Library
Author	Wei Chen Yonglin Yu Jialin Zhao Kai Shi Barry, L.P.
Copyright Year	2013
Description	Author affiliation: Rince Inst., Dublin City Univ., Dublin, Ireland (Kai Shi; Barry, L.P.) \|\| Wuhan Nat. Lab. for Optoelectron., Huazhong Univ. of Sci. & Technol., Wuhan, China (Wei Chen; Yonglin Yu; Jialin Zhao)
Abstract	Summar form only given. Widely tunable lasers are expected to be used in coherent optical communications as primary laser sources for a more agile optical network. Sampled grating distributed Bragg reflector (SGDBR) lasers have been proven to be a good candidate for these applications. SGDBR lasers, which are multi-section lasers, exhibit a more complex linewidth broadening than fixed-wavelength semiconductor $lasers^{1}.$ To understand how the phase noise processes in the laser will affect the performance of coherent systems, it is important to be able to accurately model their linewidth. Besides spontaneous emission noise in the active section, shot noise in the passive sections results in a significant linewidth broadening when the tuning current is injected. This process when combined with the detuning of the cavity mode and super mode, consequently result in regular variations of the $linewidth^{2}.Based$ on TLLM we have developed a theoretical model for SGDBR lasers previously3. In this paper, we extend this model to investigate the linewidth of SGDBR lasers taking into account spontaneous emission noise in the active section and shot noise in the passive sections. The linewith of SGDBR lasers is successfully characterized with 1MHz frequency resolution by the developed model.
Sponsorship	Eur. Phys. Soc.
Starting Page	1
Ending Page	1
File Size	191381
Page Count	1
File Format	PDF
e-ISBN	9781479905942
DOI	10.1109/CLEOE-IQEC.2013.6801285
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-05-12
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Laser theory Semiconductor lasers Laser noise Laser modes Educational institutions Optical fiber communication
Content Type	Text
Resource Type	Article

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