Modulational instability and parametric amplification induced by loss dispersion in optical fibers.
Modulational instability and parametric amplification induced by loss dispersion in optical fibers.
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DOI：
10.1103/physrevlett.93.163902
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发表时间：
2004-10
影响因子：
8.6
通讯作者：
Takuo Tanemura;Y. Ozeki;K. Kikuchi
中科院分区：
文献类型：
--
作者：
Takuo Tanemura;Y. Ozeki;K. Kikuchi
我们表明，当光纤损耗（增益）随波长变化时，即使在光纤的正常群速度色散范围内，也可能出现调制不稳定性。获得了不稳定增益的简单解析表达式，表明损耗色散的奇数阶项是造成这种现象的原因。不稳定性增益是在光学参量放大配置中通过实验测量的。当我们在闲频波长处应用窄带损耗时，在非相位匹配状态下会产生大参数增益。
We show that modulational instability may arise even in the normal group-velocity dispersion regime of an optical fiber when the fiber loss (gain) varies depending on the wavelength. A simple analytical expression for the instability gain is obtained, which reveals that the odd-order terms of the loss dispersion are responsible for this phenomenon. The instability gain is measured experimentally in an optical-parametric-amplification configuration. Large parametric gain is induced in a non-phase-matched regime as we apply narrow band loss at the idler wavelength.