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首页> 外文会议>Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications V >Polarization properties of nonlinear optical loop mirror with twisted fiber and birefringence bias in the loop
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Polarization properties of nonlinear optical loop mirror with twisted fiber and birefringence bias in the loop

机译：具有双折射和扭曲光纤的非线性光学环形镜的偏振特性

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摘要

We discussed a nonlinear optical loop mirror (NOLM) device using a symmetrical coupler, highly twisted fiber, and a quarter-wave (QW) retarder introducing the polarization asymmetry in the loop. We have shown high contrast operation, flexibility of characteristics, and stability in time. We analyze theoretically and study experimentally the transmission behavior for different input polarization considering as well different output polarizations. The nonlinear characteristics depend on the QW retarder plate angle, but also on the polarization state at the NOLM input. Experiments were carry out with the NOLM consisted of a 500-m length SMF-28 fiber with twist rate of 7 turns/meter. Experiments show a good agreement with our theoretical approach. Appropriate choice of the input and output polarizations allows very high contrast, at least higher than 5000. Experiments show flexibility and stability of characteristics. Adjustment of the QW retarder and input polarization allows tuning the critical power over a wide range.
机译：我们讨论了使用对称耦合器，高扭曲光纤和四分之一波（QW）延迟器的非线性光学环路镜（NOLM）器件，该延迟器在环路中引入了偏振不对称性。我们展示了高对比度的操作，特性的灵活性以及时间的稳定性。我们从理论上进行分析，并通过实验研究了考虑到不同输出极化的不同输入极化的传输行为。非线性特性取决于QW延迟片的角度，还取决于NOLM输入处的偏振态。实验是使用长度为500米的SMF-28光纤，扭曲速率为7转/米的NOLM进行的。实验表明与我们的理论方法非常吻合。输入和输出偏振的适当选择可以提供非常高的对比度，至少要高于5000。实验显示出特性的灵活性和稳定性。调节QW延迟器和输入极化可以在很宽的范围内调节临界功率。

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