Dynamic population gratings formed by two‐wave mixing in an erbium‐doped fiber amplifier are reported. One of the counter‐propagating fields is intensity‐modulated to distinguish reflection from the grating from amplified transmission fields. The modulation‐frequency dependence of the reflection is studied under single‐wavelength and two‐wavelength input conditions to separate reflection from transient gain. The results are analyzed by measuring the gain saturation and recovery times using self‐probe and pump–probe techniques.

中文翻译：

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掺b光纤放大器中通过两波混合形成的动态人口光栅的观察和评估

据报道，在掺do光纤放大器中通过两波混合形成的动态人口光栅。对向传播场之一经过强度调制，以区分来自放大透射场的光栅反射。在单波长和双波长输入条件下研究反射的调制频率依赖性，以将反射与瞬态增益分开。通过使用自探测和泵探测技术测量增益饱和度和恢复时间来分析结果。