光电反馈抑制掺铒光纤激光器的低频强度噪声

量子电子学报 , 2012, 29(3): 311-315. doi: 10.3969/j.issn.1007-5461.2012.03.009

光电反馈抑制掺铒光纤激光器的低频强度噪声

张飞 ^1, , 朱军 ^2, , 汪辉 ^3, , 杨珂 ^4, , 马良川 ^5, , 俞本立 ^6,

1.安徽大学光电信息获取与控制教育部重点实验室,安徽合肥,230039

2.安徽大学光电信息获取与控制教育部重点实验室,安徽合肥,230039

3.安徽大学光电信息获取与控制教育部重点实验室,安徽合肥,230039

4.安徽大学光电信息获取与控制教育部重点实验室,安徽合肥,230039

5.安徽大学光电信息获取与控制教育部重点实验室,安徽合肥,230039

6.安徽大学光电信息获取与控制教育部重点实验室,安徽合肥,230039

基金项目: 高校省级优秀青年人才基金(2011SQRL015) 教育部博士点基金(20093401110002) 国家自然科学基金(60940022)

关键词：激光技术 , 掺铒光纤激光器 , 强度噪声 , 光电反馈

Intensity noise of erbium doped fiber laser at low frequency suppression through optoelectronic feedback

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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