To investigate the discharge parameters of the prism laser gyro under high-frequency excitation, a finite element simulation model is developed using a prism gyro structure with an optical length of 0.28 m. The optimal high-frequency excitation parameters were determined by simulating the effects of high-frequency discharge, voltage, size of the electrode plates, and horizontal displacement of the electrode plates on the gas discharge: high-frequency voltage is 6.5 to 7.5 V, frequency is 130±5 MHz, flat electrode discharge structure is used, and upper and lower electrode plates are 16×5×2 mm3 and 12×5×2 mm3, respectively. It is preferable that the center positions of both upper and lower plates be as symmetrical as possible. Finally, the experimental results validate the accuracy of the finite element analysis.
The refractive indexes of prisms are affected by temperature, hence the optical characteristics of triangular prisms ring cavity is disturbed enough to affect the stability of the laser gyro. Considering the temperature perturbation, the transmission matrices of the reflected and refracted beams on the prism surfaces have been modified. The modified results are the old 2×2 beam transfer matrices are corrected to new 3×3 matrices and the temperature perturbations are added. According to the self-consistent theory of the laser ring cavity, a physical model of the ring cavity light transmission with the temperature disturbance has been established. The theoretical analysis shows that when the temperature varies from -40℃ to 70℃, the changes of the optical cavity-length, frequency offset, and scale factor are 49μm, 0.011MHz and 1.96×10-10, respectively. An experimental system of the prism laser gyroscope has been established whose temperature can be changed, and the experimental results agree with the theoretical values.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.