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Modulation bandwidth enhancement in monolithic integrated two-section DFB lasers based on the detuned loading effect

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Journal of Semiconductors 2023年第11期44卷 52-58页

作者： Yunshan Zhang Yifan Xu Shijian Guan Jilin Zheng Hongming Gu Lianyan Li Rulei Xiao Tao Fang Hui Zou Xiangfei Chen College of Electronic and Optical Engineering and College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China College of Engineering and Applied Sciences Nanjing UniversityNanjing 210023China College of Communications Engineering PLA Army Engineering UniversityNanjing 210007China

Modulation bandwidth enhancement in a directly modulated two-section distributed feedback(TS-DFB)laser based on a detuned loading effect is investigated and experimentally *** results show that the 3-dB bandwidth of the TS-DFB laser is increased to 17.6 GHz and that chirp parameter can be reduced to *** to the absence of a detuned loading effect,there is a 4.6 GHz increase and a 2.45 reduction,*** transmitting a 10 Gb/s non-return-to-zero(NRZ)signal through a 5-km fiber,the modulation eye diagram still achieves a large ***-channel laser arrays with precise wavelength spacing are *** TS-DFB laser in the array has side mode suppression ratios(SMSR)>49.093 dB and the maximum wavelength residual<0.316 nm.

关键词： distributed feedback(DFB)laser detuned loading effect direct modulation

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High-speed directly modulated distributed feedback laser based on detuned loading and photon-photon resonance effect

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Chinese Physics B 2023年第9期32卷 274-281页

作者：张云山徐逸帆郑吉林李连艳方涛陈向飞 College of Electronic and Optical Engineering&College of Flexible Electronics Nanjing University of Posts and TelecommunicationsNanjing 210023China College of Communications Engineering PLA Army Engineering UniversityNanjing 210007China College of Engineering and Applied Sciences Nanjing UniversityNanjing 210023China

A monolithic integrated two-section distributed feedback(TS-DFB)semiconductor laser for high-speed direct modulation is proposed and analyzed *** grating structure of the TS-DFB laser is designed by the reconstructionequivalent-chirp(REC)technique,which can reduce the manufacturing cost and difficulty,and achieve high wavelength controlling *** detuned loading effect and the photon-photon resonance(PPR)effect are utilized to enhance the modulation bandwidth of the TS-DFB laser,exceeding 37 GHz,while that of the conventional one-section DFB laser is only 16 *** the bit rate of the non-return-to-zero(NRZ)signal reaches 55 Gb/s,a clear eye diagram with large opening can still be *** results show that the proposed method can enhance the modulation bandwidth of DFB laser significantly.

关键词： directly modulated laser(DML) detuned loading effect photon-photon resonance(PPR)effect reconstruction-equivalent-chirp(REC)technique

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