摘要
为了减小四频差动激光陀螺（DILAG）的磁灵敏度,提出了一种工作点控制方法,并比较了同一陀螺分别采用传统光强差稳频和新设计的工作点控制方法时磁灵敏度的差异。对两个异面腔四频差动激光陀螺进行的实验研究表明,在0~0.06 mT的磁感应强度范围内,采用传统光强差稳频时,两个陀螺的磁灵敏度分别为62.7和111.3（°）/（h.mT）。改用工作点控制电路后,两个陀螺的磁灵敏度分别改善到0.9和1.6（°）/（h.mT）。表明电子控制装置对陀螺的磁灵敏度有重要影响。四频差动激光陀螺残余磁灵敏度可能来自于横磁场导致的非互易性,详细物理机理尚需进一步研究。
To reduce magnetic sensitivity of four-frequency differential laser gyro（DILAG）,an operating point control method is proposed.Moreover,the magnetic sensitivities of the same gyro with conventional frequency stabilization using light intensity comparison and with the new operating point control method are compared.In the range of 0～0.06 mT,the magnetic sensitivities of two experimental gyros are 62.7 and 111.3（°）/（h·mT）,respectively,when the gyros are controlled with conventional frequency stabilization method.However,the magnetic sensitivities are improved to 0.9 and 1.6（°）/（h·mT） respectively,when they are controlled with a new operating point control method.The results indicate that electronic control means are of significance to the magnetic sensitivity.The residual magnetic sensitivity maybe arises from nonreciprocal effects induced by transverse magnetic field,which is going to be investigated in future work.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2010年第3期713-717,共5页
Chinese Journal of Lasers
关键词
测量
四频差动激光陀螺
磁灵敏度
工作点
零偏
measurement
four-frequency differential laser gyro
magnetic sensitivity
operating point
bias
