Improved λ/4 phase-shifted DFB semiconductor laser with spatial hole burning compensation using grating chirp |
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| Authors: | Yuechun Shi Simin Li Yating Zhou Linlin Lu Lianyan Li Yijun Feng Xiangfei Chen |
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| Institution: | 1. Microwave-Photonics Technology Laboratory, Nanjing National Laboratory of Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu 210093, China;2. School of Electronic Science and Engineering, Nanjing University, Nanjing, Jiangsu 210093, China |
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| Abstract: | A λ/4 phase-shifted distributed feedback (DFB) semiconductor laser with a preformed chirped grating used to compensate the spatial hole burning (SHB) induced index change is proposed and analyzed. It shows that compared with the three phase shifted DFB laser which is known for its good performance to eliminate SHB, the proposed SHB compensated laser has better single longitudinal mode property, narrower spectral linewidth and better dynamic characteristics. |
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