Time-delay signature concealment of polarization-resolved chaos outputs in vertical-cavity surface-emitting lasers with variable-polarization filtered optical feedback
Time-delay signature concealment of polarization-resolved chaos outputs in vertical-cavity surface-emitting lasers with variable-polarization filtered optical feedback
复制标题
具有可变偏振滤波光反馈的垂直腔表面发射激光器中偏振分辨混沌输出的时延特征隐藏
DOI：
10.3788/col201513.091401
复制
发表时间：
2015-09
影响因子：
3.5
通讯作者：
Zheng-Mao Wu
中科院分区：
文献类型：
--
作者：
Zhu-Qiang Zhong;Jia-Gui Wu;Shun-Tian Wang;Zheng-Mao Wu
利用排列熵和自相关函数，从理论上计算了垂直腔面发射激光器(VCSEL)变偏振滤波光反馈(VPFOF)的时延特性。研究表明，反馈速率η、偏振器角度θp和滤光片带宽Λ对TDS有明显的影响。为了寻找具有弱TDS的混沌，模拟了TDS在参数空间(η，Λ)和(η，θp)中的演化映射。此外，与保偏滤波光反馈的VCSEL和变偏振镜反馈的VCSEL相比，这种VPFOF-VCSEL在抑制TDS方面具有优势。
Through employing permutation entropy and the self-correlation function, the time-delay signature (TDS) of a vertical-cavity surface-emitting laser (VCSEL) with variable-polarization filtered optical feedback (VPFOF) is evaluated theoretically. The work shows that the feedback rate η, polarizer angle θp, and filter bandwidth Λ have an obvious influence on the TDS. The evolution maps of the TDS in parameter space (η,Λ) and (η,θp) are simulated for searching the chaos with weak TDS. Furthermore, compared with a VCSEL with polarization-preserved filtered optical feedback and a VCSEL with variable-polarization mirror optical feedback, this VPFOF–VCSEL shows superiority in TDS suppression.