Measurement of the free spectral range of the laser cavity based on multi-longitudinal mode laser self-mixing vibrator

被引：14
|
作者：
Zhao, Yunkun [1 ]
Zhou, Junfeng [1 ]
Lu, Liang [1 ,2 ]
机构：
[1] Anhui Univ, Minist Educ, Key Lab Optoelect Informat Acquisit & Manipulat, Jiulong Rd 111, Hefei 230601, Anhui, Peoples R China
[2] Anhui Univ, Inst Phys Sci & Informat Technol, Hefei, Anhui, Peoples R China
来源：
MEASUREMENT | 2019年 / 135卷
基金：
中国国家自然科学基金;
关键词：
Self-mixing; The free spectral range; Multi-longitudinal mode; Vibrator; OPTICAL FEEDBACK; SENSOR; DISPLACEMENTS; GENERATION; RESOLUTION; DIODE;
D O I：
10.1016/j.measurement.2018.11.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A method by tracing the multi-longitudinal mode laser self-mixing vibrator waveform with adjusting of the external cavity length based on the laser self-mixing effect is proposed to measure the free spectral range of the laser cavity. According to the variation period of the external cavity, the free spectral range of the He-Ne laser cavity is calculated to be 0.633 GHz with the resolution of 2.67 MHz. Simultaneously, we further investigate the relationship between the waveform separation degree and the phase delay of two adjacent peaks caused by the superimposed self-mixing vibration signal waveforms of different modes. The experimental results have been demonstrated that this strategy is appropriate for the measurement of the free spectral range of the laser cavity duo to the significant merits of general complexity and cost, and non-contact measurement. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：467 / 472
页数：6
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