光子学报, 2017, 46 (11): 1106001, 网络出版: 2017-12-08  

宽频调谐的光纤耦合声光调制系统

Fiber-Coupled Acousto-Optic Modulator System with Wide Frequency Tuning
陈江 1,2,3,*阮军 1,2刘丹丹 1,2,3王心亮 1,2,3王鑫 1,2张首刚 1,2
作者单位
1 中国科学院国家授时中心, 西安 710600
2 中国科学院时间频率基准重点实验室, 西安 710600
3 中国科学院大学, 北京 100039
摘要
采用双次通过声光调制器和“猫眼”结构, 消除频率调制带来的光路偏转并增大激光频率的调谐范围, 使用射频驱动功率反馈调节法实现了激光功率的稳定.理论计算和实验验证表明, 选择焦距为40 mm透镜方案, 激光频率调谐在160 MHz时, 系统整体光纤耦合效率达到了56.8%.在保证系统光利用率大于15%时, 系统的有效频率调谐范围为100 MHz.通过功率稳定系统, 在频率调谐60 MHz的变化范围内, 输出光功率波动控制在±0.07%以内并能保持长期稳定工作.
Abstract
The system adopts the scheme of double pass acousto-optic modulator configuration and "cat′s eye" structure, which eliminates the optical path deflection caused by frequency modulation and increases the tuning range of the laser frequency. Meanwhile, for the purpose of reducing the power fluctuations, we have constituted a feedback loop by using the method of radio frequency drive power. Through the theoretical calculation and experimental verification, the system chooses the lens with the focal length of 40 mm. When the laser frequency is tuned at 160 MHz, the overall fiber coupling efficiency is 56.8%. To ensure that the overall system utilization of laser is greater than 15%, the system′s effective frequency tuning range of 100 MHz.Through the power stabilization system, we have achieved the stability of ±0.07% with the frequency tuning range of 60 MHz and can maintain long-term stable operation.

陈江, 阮军, 刘丹丹, 王心亮, 王鑫, 张首刚. 宽频调谐的光纤耦合声光调制系统[J]. 光子学报, 2017, 46(11): 1106001. CHEN Jiang, RUAN Jun, LIU Dan-dan, WANG Xin-liang, WANG Xin, ZHANG Shou-gang. Fiber-Coupled Acousto-Optic Modulator System with Wide Frequency Tuning[J]. ACTA PHOTONICA SINICA, 2017, 46(11): 1106001.

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