面向21世纪的双频激光及相关测量科学技术

Dual Frequency Laser and Relative Measurement Technology in the 21st Century

测 2 1世纪初几种重要激光计量仪器的发展水平 :双频激光可输出近零赫兹到百吉赫兹的频差 ,频差的稳定性将达到 1 0 - 7,从而使相对测量干涉仪的测量速度获得提高 ;高精度、长距离的绝对测量得以实现 ;双频激光的发展使建立新的可溯源到光波长的波片测量基准成为可能 ;产生一种可直接传感位移的激光器 ,可在很大程度上取代电感测微仪 ;产生一种测角仪 ,可在几十度范围内达到 0 .0 1′分辨率 ;产生一种惯性振动测量仪器 ,分辨率达到纳米。

In the next century, dual frequency He-Ne laser can output the frequency difference close to 0MHz and a few hundred GHz. The stability of frequency difference will reach to 10 -7 .Therefore, the interferometers will be of higher measurement speed, higher accuracy and larger measurement range. A type of displacement sensing lasers will be produced with advantages of self-calibration, which will be strong competitor of inductance micrometers. New angle measurement instrument will be developed with 0.01 second resolution in tens of degrees measurement range.