一种利用光子晶体光纤中的长周期光栅和带通滤波器的光纤环形镜温度传感器解调技术。

A fiber loop mirror temperature sensor demodulation technique using a long-period grating in a photonic crystal fiber and a band-pass filter.

作者信息

Wang Yunpeng, Zhao Chun-Liu, Dong Xinyong, Kang Juan, Jin Shangzhong

机构信息

Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, People's Republic of China.

出版信息

Rev Sci Instrum. 2011 Jul;82(7):073101. doi: 10.1063/1.3606432.

DOI:10.1063/1.3606432

PMID:21806166

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.

摘要

提出了一种基于光子晶体光纤（PCF）中写入的长周期光栅（LPG）和带通滤波器作为解调器的光纤环形镜（FLM）温度传感器。通过利用PCF中LPG的稳定滤波功能，FLM的谐振波长随温度的变化被有效地转换为输出光的强度变化。通过监测滤波器带通的光强度，用功率计推导出施加在FLM上的温度。实验结果表明，当使用半高宽为3nm、中心波长为1545nm的滤波器时，温度灵敏度高达~1.742dB/°C。