3 December 2014 Detection of optical circulator crosstalk based on signal modulation
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Abstract
A novel method based on piezoelectric transducer (PZT) modulation for detecting the crosstalk of optical circulator has been demonstrated. In the experiment, the lightwave emitted from a low-noise single-frequency laser passed through the circulator, reflected on the surface of the PZT, and returned to the circulator again. The PZT can modulate the frequency of the lightwave reflected on it due to the Doppler effect. Then the crosstalk of the circulator is obtained by measuring the induced optical difference frequency based on a difference-frequency detection technology. The results show that this method is very effective in detecting weak crosstalk of circulator.
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Qiu-feng Shao, Qian Zhang, Rui Yang, Heng Zhang, "Detection of optical circulator crosstalk based on signal modulation", Proc. SPIE 9297, International Symposium on Optoelectronic Technology and Application 2014: Laser and Optical Measurement Technology; and Fiber Optic Sensors, 929739 (3 December 2014); doi: 10.1117/12.2075188; https://doi.org/10.1117/12.2075188
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