Fiber-Optic Four-Channel Dual-Balanced Heterodyne Phase Detection

Shi Jianbo; Zhang Juan; Liu Dean

doi:10.3788/CJL201946.0904005

Chinese Journal of Lasers, Volume. 46, Issue 9, 904005(2019)

Fiber-Optic Four-Channel Dual-Balanced Heterodyne Phase Detection

Shi Jianbo^1,2, Zhang Juan¹, and Liu Dean^2,3

¹Key Laboratory of Specialty Fiber Optics and Optical Access Networks, School of Communication & Information Engineering, Shanghai University, Shanghai 200444, China

²National Laboratory of High Power Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

³Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences,Beijing 100049, China

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Figures & Tables(9)

Fig. 1. Schematic of fiber-optic four-channel dual-balanced heterodyne phase detection

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Fig. 2. Phase detection values at 500.5 kHz

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Fig. 3. Difference frequency signal diagrams at different frequencies. (a) 900.5 Hz; (b) 100.5 KHz; (c) 2.05 MHz

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Fig. 4. Phase values at different modulation frequencies

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Fig. 5. Phase values at different fiber splitting ratios and 700.5 kHz

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Fig. 6. Trend graph of different fiber splitting ratios and standard deviations at 700.5 kHz

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Fig. 7. Signal intensity as a function of receiving angle

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Table 1. Phase detection accuracy at different frequencies
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Table 1. Phase detection accuracy at different frequencies
Frequency /kHz RMS /(°) Standard deviation /(°)
40.5 88.9 0.5
100.5 89.0 0.5
500.5 89.1 0.3
700.5 89.1 0.3
1550.5 89.1 0.3

Table 2. Phase detection accuracy at different fiber splitting ratios and 700.5 kHz
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Table 2. Phase detection accuracy at different fiber splitting ratios and 700.5 kHz
Splitting ratio RMS /(°) Standard deviation
5∶95 88.8 0.4
20∶80 89.0 0.4
40∶60 89.1 0.3

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Shi Jianbo, Zhang Juan, Liu Dean. Fiber-Optic Four-Channel Dual-Balanced Heterodyne Phase Detection[J]. Chinese Journal of Lasers, 2019, 46(9): 904005

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