Measurement Technology of Laser Relative Intensity Noise at Low Frequency for Space-Based Gravitational Wave Detection

Hailin Hu; Yihang Yu; Dijun Chen; Guangwei Sun; Kangwen Yang; Fang Wei; Fei Yang

doi:10.3788/CJL230701

Chinese Journal of Lasers, Volume. 50, Issue 23, 2301009(2023)

Measurement Technology of Laser Relative Intensity Noise at Low Frequency for Space-Based Gravitational Wave Detection

Hailin Hu¹, Yihang Yu², Dijun Chen², Guangwei Sun², Kangwen Yang¹, Fang Wei^2、*, and Fei Yang^2、**

¹School of Optical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai , 200093, China

²Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

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Figures & Tables(12)

Fig. 1. Laser RIN evaluation system at low frequency

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Fig. 2. Schematic diagram of Smooth algorithm

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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

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Fig. 4. Photodetector. (a) Internal structure; (b) temperature and vibration isolation package

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Fig. 5. PD background noise test. (a) PD voltage fluctuations in the time domain; (b) PD background noise

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Fig. 6. Comparison of background noise before and after the addition of LNA in the test system (b)

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Fig. 7. RIN and error rate of the laser at different sampling time

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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

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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 1. Requirements of space-based gravitational wave detection on RIN of laser^[12]
Frequency RIN /（dBc·Hz^-1）
0.1 mHz‒10 kHz -80
10 kHz‒100 kHz -100
100 kHz‒700 kHz -80
700 kHz‒5 MHz -130.4
5 MHz‒50 MHz -80
50 MHz‒5 GHz -86

Table 2. Noise performance of DMM
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Table 2. Noise performance of DMM
Integration time /s Resolution /10^-6 Sampling rate /（Sa·s^-1）
1 0.30 50
2 0.20 25
10 0.10 5
100 0.03 0.5

Table 3. Error rate of RIN test with different sampling time
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Table 3. Error rate of RIN test with different sampling time
Sampling time /s Error rate /%
10000 uncalculable
20000 70.72
30000 50.00
40000 40.82
50000 35.35
60000 31.73
70000 28.87
80000 26.73

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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

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Paper Information

Category: laser devices and laser physics

Received: Mar. 11, 2023

Accepted: Apr. 25, 2023

Published Online: Nov. 27, 2023

The Author Email: Wei Fang (weifang@siom.ac.cn), Yang Fei (fyang@siom.ac.cn)

DOI:10.3788/CJL230701

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Requirements of space-based gravitational wave detection on RIN of laser[12]

Table 1. Requirements of space-based gravitational wave detection on RIN of laser[12]

Table 2. Noise performance of DMM

Table 2. Noise performance of DMM

Table 3. Error rate of RIN test with different sampling time

Table 3. Error rate of RIN test with different sampling time

Table 1. Requirements of space-based gravitational wave detection on RIN of laser^[12]

Table 1. Requirements of space-based gravitational wave detection on RIN of laser^[12]