Chinese Optics Letters, Vol. 18, Issue 7, 071202 (2020)
Multi-channel polarized low-coherence interference synchronous demodulation system based on a matrix charge-coupled device
Shuang Wang1,2,3,*, Jie Zhou1,2,3, Junfeng Jiang1,2,3,**, Kun Liu1,2,3, Qun Han1,2,3, Yanan Duan1,2,3, Rundong Wang1,2,3, and Tiegen Liu1,2,3
- 1School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China
- 2Key Laboratory of Opto-electronics Information Technology, Ministry of Education, Tianjin 300072, China
- 3Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin 300072, China
A multi-channel synchronous demodulation system of a polarized low-coherence interferometer (PLCI) based on a matrix charge-coupled-device (CCD) is proposed and demonstrated. By using special designs, the system allows the signals from different channels to be received and demodulated synchronously. Multichannel air pressure experiments were implemented to verify the effectiveness of the proposed system. The experiment results showed that the Fabry–Perot (F–P) sensors could be demodulated synchronously with a high tolerance for light sources and sensors, which indicated that any sensor and light source that can be demodulated by PLCI were allowed to be employed, leading to a wide application in the field of multichannel synchronous measurement.
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