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光电反馈抑制掺铒光纤激光器的低频强度噪声

, PP. 311-315

Keywords: 激光技术,掺铒光纤激光器,强度噪声,光电反馈

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Abstract:

通过光电反馈电路对掺铒光纤激光器的中低频噪声进行了抑制。根据速率方程理论,分析了影响掺铒光纤激光器强度噪声的因素,通过电路仿真分析优化反馈电路参数,重点讨论反馈信号的相位对噪声抑制的影响。实验表明激光器的低频(小于20KHz)强度噪声平均降低了10dB,中频弛豫振荡峰处(30KHz附近)抑制达35dB,并且克服了光电反馈抑制强度噪声使弛豫振荡峰向高频移动,导致高频噪声增大的问题。优异的噪声特性使光纤激光器在光传感领域具有很高的实用价值。

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