三纵模激光自混合系统测量
激光器自由光谱范围研究

量子电子学报 ›› 2020, Vol. 37 ›› Issue (6): 669-676.

三纵模激光自混合系统测量激光器自由光谱范围研究

陈由泽,张辰,赵云坤,吕亮

安徽大学物理与材料科学学院, 安徽合肥230601

收稿日期:2019-10-25 修回日期:2020-01-18 出版日期:2020-11-28 发布日期:2020-11-28
通讯作者: E-mail: lianglu@ahu.edu.cn E-mail:lianglv@ahu.edu.cn
作者简介:陈由泽( 1994 - ), 安徽铜陵人, 研究生, 主要从事激光自混合干涉技术方面的研究。E-mail: 2427472112@qq.com
基金资助:
Supported by National Natural Science Foundation of China (国家自然科学基金, 61307098, 61275165, 61741501), Foundation for Scientific Research and Technical Leaders in Anhui Province (安徽省学术带头人基金资助项目, 2017H124)

Measurement of laser free spectral range based on three-longitudinal mode laser self-mixing sensing system

CHEN Youze, ZHANG Chen, ZHAO Yunkun, LV liang

School of Physics and Material Science, Anhui University, Hefei 230601, China

Received:2019-10-25 Revised:2020-01-18 Published:2020-11-28 Online:2020-11-28
Contact: Liang .Lu E-mail:lianglv@ahu.edu.cn

摘要/Abstract

摘要： 激光自混合干涉技术具有灵敏度高、易准直、可以实现非接触测量等优点。基于多纵模激光自混合干涉系统中自混合信号波形随外腔长度发生周期性变化的物理现象, 提出一种利用三纵模激光自混合振动传感系统测量激光器自由光谱范围(FSR) 的新方案。结合干涉混频理论和三镜腔理论, 首次建立了三纵模激光自混合振动传感系统测量激光器FSR 的理论模型并进行了仿真模拟。实验结果表明尾纤半导体激光器FSR 受外部环境影响, 其变化范围为163.93 ∼ 175.64 GHz, 对应测量系统的位移分辨率和频率分辨率分别为0.01 mm 和1.91 GHz。所研究的激光器FSR 测量系统具备分辨率高、系统紧凑、成本低廉等优势, 可适用于不同类型激光器自由光谱范围测量。

关键词: 激光技术, 激光自混合干涉技术, 自由光谱范围, 振动信号, 波形分立, 三纵模

Abstract: Laser self-mixing technique has the advantages of high sensitivity, easy collimation and noncontact measurement. In a multi-longitudinal mode laser self-mixing interference system, the self-mixing signal waveform changes periodically with the external cavity length. According to this physical phenomenon, a novel scheme for measuring the free spectral range (FSR) of laser using a three-longitudinal mode laser self-mixing vibration sensing system is proposed. Combined with the interference mixing theory and three-mirror cavity theory, the theoretical model of measuring laser FSR based on a three longitudinal mode laser self-mixing vibration sensing system is established for the first time, and the corresponding numerical simulation is carried out. Results show that the FSR of the pigtailed laser diode is affected by the external environment, and its variation range is from 163.93 GHz to 175.64 GHz. The displacement resolution and frequency resolution of the system is 0.01 mm and 1.91 GHz respectively. Due to the excellent merits of high resolution, compactness and low-cost, it is expected that the system can be applied to FSR measurement of various types of lasers.

Key words: laser techniques, laser self-mixing technique, free spectral range, vibration signal, waveform separation, three-longitudinal mode

中图分类号:

TN248

陈由泽张辰赵云坤吕亮. 三纵模激光自混合系统测量激光器自由光谱范围研究[J]. 量子电子学报, 2020, 37(6): 669-676.

CHEN Youze, ZHANG Chen, ZHAO Yunkun, LV liang. Measurement of laser free spectral range based on three-longitudinal mode laser self-mixing sensing system[J]. Chinese Journal of Quantum Electronics, 2020, 37(6): 669-676.

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