19 November 2007 λ/4 phase-shifted distributed feedback lasers with chirped grating: dynamic single-mode and modulation characteristics analyses
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Proceedings Volume 6782, Optoelectronic Materials and Devices II; 678217 (2007) https://doi.org/10.1117/12.739673
Event: Asia-Pacific Optical Communications, 2007, Wuhan, China
Abstract
The dynamic single-mode and modulation performance of λ/4 phase-shifted distributed feedback laser diode with chirped grating (QWS-CG-DFB) are analyzed theoretically. The numerical simulation shows that, In contrast to purely QWS-DFB laser, the enhanced dynamic single-mode suppression ratio (SMSR) can be reached by QWS-CG-DFB laser; Under the smaller biasing current, the modulation band-width in presence of chirped grating is narrower, this difference shrinks for larger biasing current; For large signal modulation, the chirped grating is helpful to increase the output extinction ratio, but worsens the frequency chirping.
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Xin-Hong Jia, Zheng-Mao Wu, Guang-Qiong Xia, Dong-Zhou Zhong, Fei Wang, Jia-Gui Wu, Hai-Tao Chen, "λ/4 phase-shifted distributed feedback lasers with chirped grating: dynamic single-mode and modulation characteristics analyses", Proc. SPIE 6782, Optoelectronic Materials and Devices II, 678217 (19 November 2007); doi: 10.1117/12.739673; https://doi.org/10.1117/12.739673
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