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Polarization switching bistability and dynamics in vertical-cavity surface-emitting laser under orthogonal optical injection

机译：正交注入光下垂直腔面发射激光器的偏振转换双稳态和动力学

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摘要

Bistability as well as dynamics associated to polarization switching in a vertical-cavity surface-emitting laser (VCSEL) submitted to orthogonal optical injection from an external master laser are investigated. Intensity-polarization switching bistability is studied by increasing and decreasing the intensity of the injected beam and for a fixed frequency detuning, i.e. the frequency offset between master and the free running VCSEL. Depending on the frequency detuning, bistable switching is experimentally found to occur with or without injection locking of the fundamental mode to the master laser frequency. For large positive detuning, injection locking of the first-order transverse mode with a strong depression of the fundamental mode has been observed. The case of frequency-polarization switching bistability, i.e. when the frequency detuning is first decreased and then increased for a fixed injected power, has also been theoretically analyzed. Qualitative comparison with previous experimental work is presented for the dependence of the width of the bistable switching region on the injection strength level. Finally we show an experimental result of complicated dynamics including period doubling route to chaos that accompany polarization switching and which motivates future theoretical investigations.
机译：研究了垂直腔表面发射激光器（VCSEL）中的偏振稳定性和与双极性切换相关的动力学，该激光器从外部主激光器进行正交光学注入。通过增加和减小注入光束的强度以及固定频率失谐（即主控和自由运行VCSEL之间的频率偏移）来研究强度-偏振切换双稳态。根据频率失谐，在实验中发现在将基本模式注入锁定或不注入锁定到主激光器频率的情况下都会发生双稳态切换。对于大的正失谐，已经观察到一阶横向模的注入锁定，同时基本模的强烈下移。理论上也分析了频率极化切换双稳态的情况，即当频率失谐首先减小然后增加的情况。与以前的实验工作进行了定性比较，以证明双稳态开关区域的宽度与注入强度水平有关。最后，我们给出了一个复杂的动力学实验结果，其中包括周期倍增的路径到伴随极化切换的混沌，并激发了未来的理论研究。

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