Laser & Optoelectronics Progress, Volume. 58, Issue 17, 1714003(2021)
Experimental Study on Time-Delay Characteristic and Effective Bandwidth for Chaotic Semiconductor Lasers
The time-delay characteristic and effective bandwidth of semiconductor lasers produced by dual modulation of external optical injection and feedback are numerically and experimentally investigated. The experimental results show that the dual-modulated laser system has large bandwidth, and the time-delay characteristic is weakened compared with the single-modulated laser system. The experimental results have been compared to verify the obtained numerical results, indicating that the proposed scheme can improve the security performance of chaotic laser-based secure communication. Besides, more effective bandwidth and less time-delay characteristic can be obtained in the negative frequency-detuning region. The delay characteristic suppression will deteriorate in the positive frequency-detuning region.
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Pengbo Liu, Shenghai Zhang, Zhengtong Wei, Tian'an Wu, Xiaoxu Zhang, Wenbo Chen. Experimental Study on Time-Delay Characteristic and Effective Bandwidth for Chaotic Semiconductor Lasers[J]. Laser & Optoelectronics Progress, 2021, 58(17): 1714003
Category: Lasers and Laser Optics
Received: Dec. 5, 2020
Accepted: Jan. 11, 2021
Published Online: Sep. 14, 2021
The Author Email: Zhang Shenghai (ccstshz@163.com)