Hailin Hu, Yihang Yu, Dijun Chen, Guangwei Sun, Kangwen Yang, Fang Wei, Fei Yang. Measurement Technology of Laser Relative Intensity Noise at Low Frequency for Space-Based Gravitational Wave Detection[J]. Chinese Journal of Lasers, 2023, 50(23): 2301009
- Chinese Journal of Lasers
- Vol. 50, Issue 23, 2301009 (2023)
Fig. 1. Laser RIN evaluation system at low frequency
Fig. 2. Schematic diagram of Smooth algorithm
Fig. 3. DMM background noise test. (a) Voltage fluctuation in the time domain of DMM; (b) background noise after FFT and Smooth processing; (c) background noise after WOSA and Smooth processing; (d) comparison of test results with DMM stabilization and without stabilization
Fig. 4. Photodetector. (a) Internal structure; (b) temperature and vibration isolation package
Fig. 5. PD background noise test. (a) PD voltage fluctuations in the time domain; (b) PD background noise
Fig. 6. Comparison of background noise before and after the addition of LNA in the test system (b)
Fig. 7. RIN and error rate of the laser at different sampling time
Fig. 8. RIN test results. (a) RIN of different frequency bands measured by DMM and SR770; (b) RIN of laser in 0.1 mHz~100 kHz frequency band
Fig. 9. RIN of different types of lasers at low frequency
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Table 1. Requirements of space-based gravitational wave detection on RIN of laser[12]
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Table 2. Noise performance of DMM
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Table 3. Error rate of RIN test with different sampling time
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