电磁感应涡流加热稳频系统设计
杨威，黄伟，陈祖洋，钟瑞卿
（四川大学 制造科学与工程学院，四川 成都 610065）
摘要：针对在线测量需要强抗干扰能力以及高速测量的需要，利用新式He-Ne激光器采用金属管颈的特点，采用电磁感应涡流加热方法实现热稳频。该方法改变的谐振腔部分（激光管管颈）不被放电管外的玻璃管包围，所以散热条件好，其热变形不受约束，使系统具有预热时间短、响应速度快、抗干扰能力强、频率稳定性好等优点。经实验证明，此方法使激光器输出激光频率稳定度在恒温条件为时可达10-9，在有强冷、热气流吹拂时，也能保证不低于10-7的频率稳定度。同时双频激光频差大于500 MHz，使测量速度进一步提高。
关键词：激光稳频；电磁感应；涡流稳频；稳频精度；抗干扰
中图分类号：O441.3 文献标识码：A 文章编号：1006－0316 (2013) 06－0053－04
The system design of using electro-magnetic induction heating toperform the laser frequency stabilized
YANG Wei，HUANG Wei，CHEN Zu-yang，ZHONG Rui-qing
( School of Manufacturing Engineering, Sichuan University, Chengdu 610065, China )
Abstract：In order to meet the requirements of online measurement in high anti-interference ability and the needs of the high-speed measurements, this article provides a new system which used induction heating to perform frequency-stabilized of double longitude modes laser. The neck of laser tube based on this method is exposed in air with very good thermal dispersion conditions, so the system has a short warm-up time, rapid response speed, strong anti-interference ability and good frequency stability. Experiments have demonstrated that, under the condition of constant temperature, the frequency error of double-frequency laser interferometer with two longitudinal modes could be controlled within 10-9. Even with conditions such as with cool or hot air blowing, it can still be kept within 10-7. While its modal difference (i.e. carrier frequency) is large than 500 MHz, the measurement speed is further improved.
Key words：laser frequency stabilization; electro-magnetic induction；eddy；accuracy；anti-interference
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收稿日期：2012－12－03
作者简介：杨威（1986－），男，河南开封人，硕士研究生，主要研究方向为仪器仪表工程。
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