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Suppressing longitudinal spatial hole burning with dual assisted phase shifts in pitch-modulated DFB lasers

周期调制DFB半导体激光器的双辅助相移对空间烧孔效应的抑制作用

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  • Physics & Astronomy
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Science Bulletin

Abstract

An equivalent corrugation pitch-modulated (ECPM) distributed feedback (DFB) semiconductor laser with two equivalently assisted phase shifts (EAPS) was theoretically studied and experimentally demonstrated. The simulated results showed that the longitudinal photon density distribution of the ECPM + EAPS DFB lasers was much more uniform than that of a sole ECPM DFB laser without EAPS, and the longitudinal spatial hole burning was therefore suppressed more effectively. The results of experiment showed that good single longitudinal mode operation was achieved, with side mode suppression ratio (SMSR) being over 35 dB, and the wavelength range was from 1,559.64 to 1,563.02 nm when the operation current was from 50 to 160 mA at the temperature of 25 °C, and the SMSR increased to 46.29 dB when the injection current was 130 mA.

摘要

由于分布反馈式(DFB)半导体激光器具有结构简单、频谱稳定等优点,在光通信领域具有十分广泛的应用。传统的DFB激光器在大电流条件下容易产生空间烧孔效应,从而造成单模特性不稳定。为了抑制空间烧孔效应,本文基于重构等效啁啾技术设计了具有双辅助相移的周期调制光栅结构,并从理论和实验两个方面进行了研究,理论仿真和实验结果吻合。另外仿真计算了激光器谐振腔中光场分布的平坦因子,利用双辅助相移周期调制光栅结构的DFB激光器,其腔内光场分布平坦程度得到明显提高。实验结果表明:温度25 °C,注入电流50-160 mA时,激光器边模抑制比均超过35 dB,单模特性保持稳定。因此,本文论述的DFB激光器对空间烧孔效应具有明显抑制作用。

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (61306068 and 61435014), the Natural Science Foundation of Jiangsu Province of China (BK20130585 and BK20140414), the National High Technology Research and Development Program (SS2015AA012302) and the Applied Basic Research Project of Suzhou City (SYG201309).

Conflict of interest

The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. National Laboratory of Solid State Microstructure, College of Engineering and Applied Sciences, Microwave-Photonics Technology Laboratory, Nanjing University, Nanjing, 210093, China

    Renjia Guo, Junshou Zheng, Yunshan Zhang, Yuechun Shi, Lianyan Li & Xiangfei Chen

  2. Nanjing University (Suzhou) High-Tech Institute, Suzhou, 215123, China

    Yunshan Zhang

  3. Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China

    Bocang Qiu

  4. Jiangsu Posts and Telecommunications Planning and Designing Institute Co. LTD, Nanjing, 210019, China

    Linlin Lu

Authors
  1. Renjia Guo
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  2. Junshou Zheng
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  4. Yuechun Shi
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  5. Lianyan Li
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  7. Linlin Lu
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Corresponding author

Correspondence to Yunshan Zhang.

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Guo, R., Zheng, J., Zhang, Y. et al. Suppressing longitudinal spatial hole burning with dual assisted phase shifts in pitch-modulated DFB lasers. Sci. Bull. 60, 1026–1032 (2015). https://doi.org/10.1007/s11434-015-0807-y

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  • DOI: https://doi.org/10.1007/s11434-015-0807-y

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