Evaluation of Errors in a Passive Ring Resonator Laser Gyroscope.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
Pagination or Media Count:
The passive ring resonator laser gyroscope is a new approach to measuring inertial rotation. This approach is based upon the Sagnac effect and uses a passive ring Fabry-Perot interferometer as the rotation sensing element. This report contains the results of a series of tests which were accomplished on a passive ring resonator laser gyroscope. The report contains a detailed description of this device plus a description of each est performed. These tests include noise measurements, inertial rotation measurements, and bias measurements. The test results show that the relationship between the output frequency and input rotation rate is linear and is consistent with previously published data indicating no lock-in problem. The output bias is shown to be affected by piezoelectric transducer position and by differences in intensity between the counter rotating light beams. Additionally, the difference in intensity also is shown to affect the noise content of the output. These significant new results lead to a recommendation to improve the performance of this new type of gyroscope via the addition of an intensity feedback control loop.
- Lasers and Masers