Multioscillator Ring Laser Gyro.

摘要

The reported study developed information on design and fabrication methods peculiar to the multioscillator (four-frequency) ring laser gyro, with study emphasis on gyro cavity sealing problems, and gain medium characterization. Sealing methods were studied for attachment of anode pins, cathode, and pumpout to the Cer-Vit block. With reasonably cautious procedures, a tri-metal metalization of the Cer-Vit, with pure tin solder, was found to be adequate. Experiments and analytic procedures were used to characterize the AC small signal behavior of the gain medium in terms of equivalent electronic circuits. This was done successfully for specific cases, but more work is needed to relate model parameters to actual gain medium parameters. Other experiments were done to relate power output and stability to various cavity parameters. An analysis was performed relating thermal effects and Fresnel-Fizeau drag as an error source. Verification data was taken on a particular ring laser gyro, showing scale factor linearity of 0.6 ppm, random drift of 0.003deg/hour 1/2, and turn-on repeatability of 0.05deg/hour. (Author)