Phase shift optimization of III/V-on-bulk-Si DFB LD for single-mode stability

A III/V-on-Bulk-Si DFB laser with a long phase shift section optimized for single-mode stability is presented. The optimized phase shift allows stable single-mode operations up to 20 times a threshold current. This mode stability is achieved by a gain difference between fundamental and higher modes...

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Bibliographic Details
Published inOptics express Vol. 31; no. 11; pp. 18265 - 18273
Main Authors Shin, Dongjae, Cha, Jungho, Shin, Yongwhack, Shin, Changgyun, Byun, Hyunil, Lee, Changbum, Kim, Woosung, Ha, Kyoungho
Format Journal Article
LanguageEnglish
Published United States 22.05.2023
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Summary:A III/V-on-Bulk-Si DFB laser with a long phase shift section optimized for single-mode stability is presented. The optimized phase shift allows stable single-mode operations up to 20 times a threshold current. This mode stability is achieved by a gain difference between fundamental and higher modes maximized by sub-wavelength-scale tuning of the phase shift section. In SMSR-based yield analyses, the long-phase-shifted DFB laser showed superior performance compared to the conventional λ/4-phase-shifted ones.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.485580