title: A fiber loop mirror temperature sensor demodulation technique using a long-period grating in a photonic crystal fiber and a band-pass filter.
abstract: A fiber loop mirror (FLM) temperature sensor using a long-period grating (LPG) written in a photonic crystal fiber (PCF) and a band-pass filter as a demodulator is proposed. By utilizing the stable filtering function of the LPG in the PCF, the resonant wavelength variation of the FLM with temperature is transferred effectively to the intensity variation of the output light. By monitoring the light intensity of the band-pass of the filter, temperature applied on the FLM is deduced by an optical power meter. Experiment results show that the temperature sensitivity is high as ~1.742 dB/ °C when a filter with a full width at half maximum 3 nm and the center at 1545 nm is used.
authors.affiliation: Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China.
authors.forename: Yunpeng
authors.initials: Y
authors.lastname: Wang
authors.forename: Chun-Liu
authors.initials: CL
authors.lastname: Zhao
authors.forename: Xinyong
authors.initials: X
authors.lastname: Dong
authors.forename: Juan
authors.initials: J
authors.lastname: Kang
authors.forename: Shangzhong
authors.initials: S
authors.lastname: Jin