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Elimination of time-delay signature in an external cavity semiconductor laser by randomly modulating feedback phase

Zhang Jian-Zhong Wang An-Bang Zhang Ming-Jiang Li Xiao-Chun Wang Yun-Cai

Elimination of time-delay signature in an external cavity semiconductor laser by randomly modulating feedback phase

Zhang Jian-Zhong, Wang An-Bang, Zhang Ming-Jiang, Li Xiao-Chun, Wang Yun-Cai
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  • Received Date:  08 October 2010
  • Accepted Date:  23 November 2010
  • Published Online:  15 September 2011

Elimination of time-delay signature in an external cavity semiconductor laser by randomly modulating feedback phase

  • 1. Institute of Optoelectronic Engineering,Department of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China

Abstract: We propose and numerically demonstrate that the feedback induced time-delay signature in an external cavity semiconductor laser can be eliminated by randomly modulating feedback phase. We find that when the rate of the random modulation signal is within the range of 0.1—1 Gb/s, and the number of the random variation amplitudes reaches 5, the time-delay signature corresponding to the external cavity can be effectively suppressed in the parameter space of injection current (1.2—2.8Ith) and feedback rate (8—26 GHz).

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