Polarization-insensitive asymmetric four-wave mixing using circularly polarized pumps in a twisted fiber.
Polarization-insensitive asymmetric four-wave mixing using circularly polarized pumps in a twisted fiber.
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DOI：
10.1364/opex.13.007497
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发表时间：
2005-09
期刊：
影响因子：
3.8
通讯作者：
Takuo Tanemura;K. Katoh;K. Kikuchi
中科院分区：
文献类型：
--
作者：
Takuo Tanemura;K. Katoh;K. Kikuchi
从理论和实验上证明了在扭转光纤中使用圆偏振泵浦光可以消除非对称非简并光纤四波混频的偏振敏感性。通过以15圈/米的速度扭转光纤并将泵浦波对准圆偏振态，我们成功地将偏振灵敏度从5.8 dB降低到0.9 dB。虽然扭转光纤的偏振模色散（PMD）限制了转换带宽，但由于扭转光纤的PMD较小，其影响相对较小。该方案是实现无偏振依赖的全光可调谐波长转换器和波长交换器件的一种简单有效的方法。
We show theoretically and experimentally that the polarization sensitivity of asymmetric nondegenerate fiber four-wave mixing can be eliminated by using circularly polarized pump waves in a twisted fiber. By twisting a fiber at 15 turns/m and aligning the pump waves to a circular state of polarization, we successfully reduce the polarization sensitivity from 5.8 dB to 0.9 dB. Although the polarization-mode dispersion (PMD) of the twisted fiber sets the limitation to the conversion bandwidth, its effect is relatively small owing to the small PMD of the twisted fiber. The demonstrated scheme should be a simple and efficient way of realizing all-optical tunable wavelength converters and wavelength-exchange devices without polarization dependence.