伪随机二进制序列
相位调制
光学
混乱的
计算机科学
调制(音乐)
物理
相位噪声
电子工程
二进制数
带宽(计算)
电信
声学
数学
工程类
算术
人工智能
作者
Pengbo Liu,Shenghai Zhang,Xiaoxu Zhang,Tian'an Wu
出处
期刊:Applied Optics
[The Optical Society]
日期:2021-06-10
卷期号:60 (17): 5245-5245
被引量:1
摘要
We experimentally reveal the potential security risks for chaotic semiconductor lasers caused by time-delay signature (TDS). In order to eliminate TDS and enhance effective bandwidth, we propose a new scheme by introducing phase-modulation injection using Gaussian noise or pseudo-random binary sequence (PRBS) as phase-modulation signals. Our numerical results indicate that TDS elimination and bandwidth enhancement are obtained over a wide-parameter region of injection strength and frequency detuning. We further improve the scheme by using two channels of chaotic lasers to generate phase-modulation signals. Numerical simulation results show that the improved scheme is feasible, and TDS cancellation quality is always excellent in wide phase-modulation depth ranges.
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