Influence of Signal Optical Power on Minimum Measurable Displacement in High‐Order ModeOptical Small Displacement Measurement System

Yonglang Lai; Chaoxia Zhang; Yazhe Cheng; Zhe Liu; Jing Zhang; Kui Liu; Hengxin Sun; Rongguo Yang

doi:10.3788/CJL220715

Chinese Journal of Lasers, Volume. 50, Issue 5, 0512003(2023)

Influence of Signal Optical Power on Minimum Measurable Displacement in High‐Order ModeOptical Small Displacement Measurement System

Yonglang Lai^1,2, Chaoxia Zhang^1,2,3, Yazhe Cheng¹, Zhe Liu⁴, Jing Zhang^1,2,3, Kui Liu^2,3, Hengxin Sun^2,3, and Rongguo Yang^1,2,3、*

Author Affiliations

¹College of Physics and Electronic Engineering, Shanxi University, Taiyuan 030006, Shanxi , China

²State Key Laboratory of Quantum Optics and Quantum Optics Devices, Taiyuan 030006, Shanxi , China

³Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, Shanxi , China

⁴Center of Information Management and Development, Taiyuan University of Technology, Taiyuan 030024, Shanxi , China

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Figures & Tables(13)

Fig. 1. Generation of beam lateral displacement

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Fig. 2. Diagram of balanced homodyne detection system

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Fig. 3. Diagram of experimental setup

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Fig. 4. Noise power spectra in 0-1 MHz band

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Fig. 5. Noise power spectra in 0-3 MHz band

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Fig. 6. Minimum measurable displacement in 0-1 MHz band

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Fig. 7. Noise power spectra for noise 3 dB-7 dB higher than shot noise limit

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Fig. 8. Displacements of piezoelectric ceramics under different driving voltages

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Fig. 9. Noise power spectra when signal optical power is 50-90 $μ W$

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Fig. 10. Noise power spectra when signal optical power and driving voltage are changed simultaneously

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Table 1. Driving voltages required for measurable minimum displacement in 600 kHz-3 MHz band
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Table 1. Driving voltages required for measurable minimum displacement in 600 kHz-3 MHz band
Frequency /MHz 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
Driving voltage /V 0.6 0.4 0.8 0.8 2.1 2.9 1.45 1.9 8.51 20.0 7.0 8.5 5.0

Table 2. Voltage amplitudes corresponding to different SNRs
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Table 2. Voltage amplitudes corresponding to different SNRs
SNR 1.0 1.5 2.2 3.0 4.0
Driving voltage /mV 1900 2400 2820 3300 3800
Displacement/（10^-10 m） 2.36 2.91 3.48 4.09 4.74

Table 3. Minimum measurable displacements when signal optical power is 50-90 $μ W$
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Table 3. Minimum measurable displacements when signal optical power is 50-90 $μ W$
Signal power / $μ W$ 50 60 70 80 90
Displacement /（10^-10 m） 2.36 2.15 2.00 1.87 1.76

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Yonglang Lai, Chaoxia Zhang, Yazhe Cheng, Zhe Liu, Jing Zhang, Kui Liu, Hengxin Sun, Rongguo Yang. Influence of Signal Optical Power on Minimum Measurable Displacement in High‐Order ModeOptical Small Displacement Measurement System[J]. Chinese Journal of Lasers, 2023, 50(5): 0512003

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Paper Information

Category: quantum optics

Received: Mar. 29, 2022

Accepted: Jun. 22, 2022

Published Online: Feb. 28, 2023

The Author Email: Yang Rongguo (yrg@sxu.edu.cn)

DOI:10.3788/CJL220715

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Driving voltages required for measurable minimum displacement in 600 kHz-3 MHz band

Table 1. Driving voltages required for measurable minimum displacement in 600 kHz-3 MHz band

Table 2. Voltage amplitudes corresponding to different SNRs

Table 2. Voltage amplitudes corresponding to different SNRs

Table 3. Minimum measurable displacements when signal optical power is 50-90 μW

Table 3. Minimum measurable displacements when signal optical power is 50-90 μW

Table 3. Minimum measurable displacements when signal optical power is 50-90 $μ W$

Table 3. Minimum measurable displacements when signal optical power is 50-90 $μ W$