Experimental Study of Time-Delay Signatures in Vertical-Cavity Surface-Emitting Lasers Subject to Double-Cavity Polarization-Rotated Optical Feedback
Experimental Study of Time-Delay Signatures in Vertical-Cavity Surface-Emitting Lasers Subject to Double-Cavity Polarization-Rotated Optical Feedback
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DOI：
10.1109/jlt.2014.2315519
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发表时间：
2014-05
影响因子：
4.7
通讯作者：
Hong Lin;Yanhua Hong;K. A. Shore
中科院分区：
文献类型：
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作者：
Hong Lin;Yanhua Hong;K. A. Shore
实验验证了双腔偏振旋转光反馈对垂直腔面发射激光器延时信号的抑制作用。在激光的两个正交偏振方向上测量了TD特征，该特征由外腔中延迟时间的自相关系数表示。结果表明，在相同的实验参数下，双腔反馈的TD信号比单腔反馈的弱22% ~ 35%。对于适当的反馈极化，TD信号变得不可见。这与理论预测相吻合。结果还表明，在大偏振角范围内，反馈强度越高，对TD信号的抑制效果越好。
Suppression of time-delay (TD) signature in a vertical-cavity surface-emitting laser subject to double-cavity polarization-rotated optical feedback has been verified experimentally. The TD signature, represented by the autocorrelation coefficient at the delay time in the external cavity, is measured in the two orthogonal polarizations of the laser. The results show that TD signatures with double-cavity feedback can be 22% to 35% weaker than those with single cavity feedback for the same experimental parameters. For appropriate feedback polarization, TD signatures become invisible. This is in good agreement with the theoretical prediction. Our results also show that higher feedback strength results in greater suppression in TD signatures in a wide range of polarization angle.