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27 November 2023 Wavelength tunable broadband optical frequency comb generation based on a gain-switched weak-resonant-cavity Fabry-Perot laser diode subject to external optical injection
Ying-Dong Liu, Guang-Qiong Xia, Fei Wang, Jun-Hui Zhang, Zheng-Mao Wu
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Proceedings Volume 12761, Semiconductor Lasers and Applications XIII; 127610C (2023) https://doi.org/10.1117/12.2686694
Event: SPIE/COS Photonics Asia, 2023, Beijing, China
Abstract
We propose a scheme to generate wavelength-tunable broadband Optical Frequency Combs (OFCs) based on an optical injection gain-switched Weak-Resonant-Cavity Fabry-Perot Laser Diode (WRC-FPLD). Firstly, a sinusoidal signal with frequency of 1.6 GHz and power of 19 dBm is utilized to drive the WRC-FPLD into the gain-switched state. Then, external optical injection is introduced into the gain-switched WRC-FPLD for generating wavelength-tunable broadband OFCs. The experimental results demonstrate that, when the wavelength of injected light is in the middle of the two modes, the OFCs with larger bandwidth can be obtained. When the wavelength and power of the injection light are 1545.6522 nm and 3.397 μW, respectively, the maximum bandwidth of generated OFC can arrive at 76.8 GHz (49 comb lines), and the single sideband phase noise for the fundamental frequency of the beat signal is as low as -125.5 dBc/Hz@10 kHz. The coherence of comb lines increases with the decrease of modulation frequency. Through varying the wavelength of injection light and selecting the matched injection power, the central wavelength of OFC can be adjusted within the range of (1525 nm, 1565 nm).
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Ying-Dong Liu, Guang-Qiong Xia, Fei Wang, Jun-Hui Zhang, and Zheng-Mao Wu "Wavelength tunable broadband optical frequency comb generation based on a gain-switched weak-resonant-cavity Fabry-Perot laser diode subject to external optical injection", Proc. SPIE 12761, Semiconductor Lasers and Applications XIII, 127610C (27 November 2023); https://doi.org/10.1117/12.2686694
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KEYWORDS
Fabry–Perot interferometers
Frequency combs
Semiconductor lasers
Interference (communication)
Wavelength tuning
Laser frequency
Singular optics
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