Design and implementation of continuous weak grating demodulation system

Zhaohui Wang; Shan Jiang; Kai Li

doi:10.1117/12.2504743

12 December 2018 Design and implementation of continuous weak grating demodulation system

Zhaohui Wang, Shan Jiang, Kai Li

Proceedings Volume 10846, Optical Sensing and Imaging Technologies and Applications; 108461H (2018) https://doi.org/10.1117/12.2504743
Event: International Symposium on Optoelectronic Technology and Application 2018, 2018, Beijing, China

Abstract

At present, the distributed detection system based on Bragg grating as sensor has become a hot spot at home and abroad due to its high precision, good long-term stability and easy detection. In ordering to improve the grating multiplexing capacity in grating sensor array, this paper proposes a new distributed the weak reflected Bragg grating temperature sensing network. The system is mainly composed of light source module, photoelectric conversion module, data acquisition module and data processing module, which combine the wavelength division multiplexing (WDM) with optical timedomain reflectometer (OTDR). And it has achieved simultaneous online monitoring of weak gratings at various central wavelengths through its homemade tunable multiwavelength light source. Due to the principle of grating reflection, the detection cycle of the system is about 1s without energy accumulation, shorter than the traditional sensing system. Because of using the OTDR, it can break through the limitation of light scanning bandwidth, and its single-channel measurement can be up to kilometers. As above, the system has many advantages, such as good real-time performance, large capacity, short response time, being able to adapt to a variety of work environment, etc.

Citation Download Citation

Zhaohui Wang, Shan Jiang, and Kai Li "Design and implementation of continuous weak grating demodulation system", Proc. SPIE 10846, Optical Sensing and Imaging Technologies and Applications, 108461H (12 December 2018); https://doi.org/10.1117/12.2504743

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