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Improving measurement sensitivity of the Raman gain coefficient in optical fibres using pump/signal simultaneous lock-in detection

机译:通过泵浦/信号同时锁定检测提高光纤拉曼增益系数的测量灵敏度

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摘要

A highly sensitive method for measuring the Raman gain coefficient using short lengths of optical fibre is demonstrated. Square-wave modulation is applied to both the pump and the signal, and lock-in detection is performed at the sum modulation frequency. A Raman on/off gain as small as 0.0015 dB can be readily measured.
机译:演示了一种使用短光纤测量拉曼增益系数的高灵敏度方法。将方波调制应用于泵和信号,并以总调制频率执行锁定检测。拉曼开/关增益小至0.0015 dB即可轻松测量。

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