J4 ›› 2012, Vol. 29 ›› Issue (3): 311-315.

• 激光技术与器件 • 上一篇    下一篇

光电反馈抑制掺铒光纤激光器的低频强度噪声

张飞,朱军,汪辉,杨珂,马良川,俞本立   

  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 230601
  • 收稿日期:2011-04-12 修回日期:2011-06-06 出版日期:2012-05-28 发布日期:2012-05-22
  • 通讯作者: 俞本立(1963-)安徽五河人,教授,博导,主要从事光纤有源/无源传感器的研究。 E-mail:benliyu@ahu.edu.cn
  • 作者简介:张飞 (1986-),安徽宿松人,研究生,从事光纤激光器的研究。E-mail:97063977@qq.com
  • 基金资助:

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

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

ZHANG Fei, ZHU Jun, WANG Hui, YANG Ke, MA Liang-chuan, YU Ben-li   

  1. Key Laboratory of Opto-electronic Information Acquisition and Manipulation, Ministry of Education, Anhui University, Hefei  230039, China
  • Received:2011-04-12 Revised:2011-06-06 Published:2012-05-28 Online:2012-05-22

摘要:

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。

关键词: 激光技术, 掺铒光纤激光器, 强度噪声, 光电反馈

Abstract:

The low and medium frequency intensity noise of the EDFL is suppressed by using optoelectronic feedback. The factors affect the intensity noise of the EDFL is analyzed by the rate equations, the importance of the phase of the feedback signal in noise suppression are discussed by simulating and optimizing the feedback circuits. The experiment result shows: the peak relaxation oscillation (about 30 KHz) was reduced to about 35dB, at the low frequency band (below 20 KHz) falls to about 10dB averagely and the relaxation oscillation peak moving to the higher frequency is suppressed. The excellent noise property indicates that the laser source has important applications in optical sensors.

Key words: laser techniques, EDFL, intensity noise, optoelectronic feedback

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