Entity

Time filter

Source Type


Liang K.,AVIC Xian Flight Automatic Control Research Institution | Han Z.,AVIC Xian Flight Automatic Control Research Institution | Chen L.,AVIC Xian Flight Automatic Control Research Institution | Fu X.,AVIC Xian Flight Automatic Control Research Institution
Guangxue Xuebao/Acta Optica Sinica | Year: 2014

Since the asymmetry of laser gain leads to the unequal of scale factor corrections between left circularly polarized and right circularly polarized gyros in the cavity, zero-lock laser gyro (ZLG) bias is sensitive to magnetic field when frequency stabilization point is not matched with magnetic insensitive point, which degrades the precision and limits work condition of ZLG. The relation between scale factor corrections and gain-to-loss ratio is analyzed according to Lamb semiclassical theory, as well as the relation between magnetic insensitive point and discharge current. The influence of discharge current changing on control signal is eliminated from signal processing system and experimental verification is performed. It is proved by both theoretical calculation and experimental results that the magnetic insensitive point varies linearly with gain-to-loss ratio as the discharge current changes linearly, which means that the magnetic sensitivity can be reduced by changing discharge current. Source


Yu W.,AVIC Xian Flight Automatic Control Research Institution | Wang J.,AVIC Xian Flight Automatic Control Research Institution | Chen L.,AVIC Xian Flight Automatic Control Research Institution | Zhang M.,AVIC Xian Flight Automatic Control Research Institution
Guangxue Xuebao/Acta Optica Sinica | Year: 2015

Ellipticity of modes in resonator and magnetic fields are two necessary conditions for magnetic sensitivity of ring laser gyroscope. Reducing ellipticity of modes is one of approaches to reduce magnetic sensitivity of ring laser gyroscope. Based on theory of resonator by Jones matrix,the positional principle of establishing selfconsistent equation is given, the method of choosing modes which exists is given, a theory of calculation on ellipticity of modes is formed. The mechanism of the effect of reflectors' parameters and angle of folding plane of ring laser on ellipticity of modes in resonator are analyzed by analytical method of numerical value. Two new approaches to reduce ellipticity of modes are advanced, they are achieved by collocating the reflection-inducedretardances of mirrors. The results of research have important significance for study of engineering on reducing magnetic sensitivity of ring laser gyroscope. ©, 2015, Chinese Optical Society. All right reserved. Source

Discover hidden collaborations