A large scale passive laser gyroscope for Earth rotation sensing
| Autor: | Zhongwei Li, Kaixian Liu, Jun Luo, Junpei Zhang, Zequn Lu, Fan Zhang, Karl Ulrich Schreiber, K. Li, Xing Feng |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Time delay and integration
Physics - Instrumentation and Detectors FOS: Physical sciences 02 engineering and technology Rotation 01 natural sciences Noise (electronics) law.invention 010309 optics Amplitude modulation Optics law 0103 physical sciences Ring laser gyroscope Sensitivity (control systems) Earth's rotation Physics business.industry Gyroscope Instrumentation and Detectors (physics.ins-det) 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0210 nano-technology business Optics (physics.optics) Physics - Optics |
| Popis: | Earth rotation sensing has many applications in different disciplines such as the monitoring of ground motions, the establishment of UT1, and the testing of the relativistic Lense-Thirring effect on the ground. We report the development of a 1 m×1 m heterolithic passive resonant gyroscope (PRG). By locking a pair of laser beams to adjacent modes of the square ring cavity in the clockwise and counter-clockwise directions, we achieve a rotation resolution of about 2×10−9 rad/s at an integration time of 1000 s. The sensitivity of the PRG for rotations reaches a level of 2×10−9 rad/s/Hz in the 5–100 Hz region, currently limited by the detection noise, residual amplitude modulation, and mechanical instability of the cavity. Our initial results improve the reported rotation sensitivity of the PRGs and indicate that PRGs have a great potential for high-resolution earth rotation sensing. |
| Databáze: | OpenAIRE |
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