北京航空航天大学学报 ›› 2015, Vol. 41 ›› Issue (10): 1836-1841.doi: 10.13700/j.bh.1001-5965.2014.0780

• 电磁理论与应用 • 上一篇    下一篇

谐振式集成光学陀螺中电流调谐致强度噪声研究

郅银周, 冯丽爽, 王俊杰, 唐依创   

  1. 北京航空航天大学仪器科学与光电工程学院, 北京 100191
  • 收稿日期:2014-12-12 修回日期:2015-02-25 出版日期:2015-10-20 发布日期:2015-11-02
  • 通讯作者: 冯丽爽(1968-),女,河北辛集人,研究员,fenglishuang@buaa.edu.cn,主要研究方向为微光机电系统、先进光纤传感技术. E-mail:fenglishuang@buaa.edu.cn
  • 作者简介:郅银周(1986-),男,河南开封人,博士研究生,zhiyinzhou@163.com
  • 基金资助:
    国家自然科学基金(61171004);北京航空航天大学博士研究生创新基金(YWF-14-YJSY-039)

Study on current-tuning-induced intensity noise in resonator integrated optic gyro

ZHI Yinzhou, FENG Lishuang, WANG Junjie, TANG Yichuang   

  1. School of Instrumentation Science and Opto-to-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2014-12-12 Revised:2015-02-25 Online:2015-10-20 Published:2015-11-02

摘要: 采用半导体激光器(LD)是谐振式集成光学陀螺(RIOG)小型化发展的重要趋势,但是LD的电流调谐特性会引入强度噪声.理论分析了电流调谐致强度噪声对开环RIOG性能的影响,得到频率锁定位置与LD输出光强之间为线性关系.随后,提出了基于频率锁定位置的强度噪声抑制方案,通过频率锁定位置实时监测LD输出光强的变化,根据监测值得到补偿系数,并补偿陀螺输出.建立了抑制电流调谐致强度噪声的理论模型,并进行了实验验证,RIOG的零偏稳定性由0.768(°)/s提高到0.103(°)/s.

关键词: 谐振式集成光学陀螺(RIOG), 半导体激光器(LD), 电流调谐, 强度噪声, 补偿

Abstract: Resonator integrated optic gyro (RIOG) employing laser diode (LD) is beneficial to miniaturization developing. However, when the frequency of the LD is tuned by current, accompany intensity noise is produced. Influence of current-tuning-induced intensity noise on the open-loop RIOG was theoretically analyzed; linear relationship between frequency locking position and output intensity of the LD was obtained. Subsequently, method of the intensity noise elimination was proposed based on the frequency locking position. Intensity fluctuation of the LD was monitored in real time by the frequency locking position. Compensation coefficients were calculated according to the monitor values, and they were used to compensate the gyro output. Finally, theoretical model that suppressing the current-tuning-induced intensity noise was set up, and the experiments were demonstrated, in which the bias stability of the RIOG was improved from 0.768(°)/s to 0.103(°)/s.

Key words: resonator integrated optic gyro (RIOG), laser diode (LD), current-tuning, intensity noise, compensation

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