Chinese Optics, Volume. 18, Issue 3, 622(2025)
Phase measurement technique based on MHz-lever depth frequency modulated laser interferometry
Fig. 3. Comparison of the modulation phase calculation results using two methods
Fig. 5. CIC filter amplitude-frequency response and mixed signal spectrum. (a) First stage-160-fold extraction; (b) second stage-160-fold extraction; (c) third stage-50-fold extraction
Fig. 6. Phasemeter test hardware environment. (a) Signal generator (top) and programmable power supply (bottom); (b) 16-channel phasemeter
Fig. 9. ASD of the readout phase noise at different amplitude levels
Fig. 10. ASD of readout phase noise under dynamic amplitude and equivalent tuning angle depths
Table 1. Evaluation parameters of fitted curves in dynamic test
View tableView in ArticleTable 1. Evaluation parameters of fitted curves in dynamic test
相位变化频率(Hz) $ f(x) = {p_1}t + {p_2} $ SSE R-square Adjusted R-square RMSE $ {p_1} $ $ {p_2} $ 0.01 3.6001 -0.0896 46.5577 1.0000 1.0000 0.0682 0.02 7.2002 0.0045 6.7390 1.0000 1.0000 0.0367 0.04 14.4001 0.0109 3.2861 1.0000 1.0000 0.0363 0.08 28.8006 -0.0727 1.6601 1.0000 1.0000 0.0364
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Xi-qian FAN, He-shan LIU, Zi-ren LUO, Zi-heng ZHANG. Phase measurement technique based on MHz-lever depth frequency modulated laser interferometry[J]. Chinese Optics, 2025, 18(3): 622
Category: Special Column on Space-based Gravitational Wave Detection
Received: Sep. 4, 2024
Accepted: Oct. 28, 2024
Published Online: Jun. 16, 2025
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