Research on fiber sensor demodulating technique using tilted fiber Bragg gratings
Tilted fibre Bragg grating (TFBG) belongs to short-period gratings family; there is core mode and a lot of cladding modes in the transmission spectrum. According to the special structure and coupling characteristic of the TFBG, we propose a novel method of edge filter linear demodulation using tilted fiber Bragg gratings in a fiber sensor system. The results show that the widely linear range of katabatic edge (1505nm~1535nm) and an assurgent edge (1545nm~1565nm) can be used in edge filtering; the thermal characteristic of the core mode and cladding modes is similar to FBG’s. Therefore, it can compensate dynamically the temperature shift of the FBG and the effect of temperature noise on the strain or other sensing signals is eliminated. The advantages of this simple system are an all-fiber design, quasi static and dynamic operation, high stability and lower cost.
Yinping Miao Bo Liu Weihua Zhang Qida Zhao
Key laboratory of Opto-electronic Information and Technology,Ministry of Education,Institute of Modern Optics,Nankai University,weijin road 94,Tianjin 300071,China.
国际会议
2008亚太光通信会议(Asia-Pacific Optical Communications 2008)
杭州
英文
2008-10-26（万方平台首次上网日期，不代表论文的发表时间）