Key Laboratory of Opto-electronics Information Technology, Ministry of Education, Tianjin University, Tianjin 300072, China.
CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, USA.
Sensors (Basel). 2019 Nov 28;19(23):5221. doi: 10.3390/s19235221.
Simultaneous measurement of temperature and strain was demonstrated using a polarization-maintaining few-mode Bragg grating (PM-FMF-FBG) based on the wavelength and phase modulation of the even L P 11 mode. The wavelength shift sensitivity and the interrogated phase sensitivity of the temperature and strain were measured to be 10 pm·°C and 0.73 pm·με and -3.2 × 10 rad·°C and 4 × 10 rad·με, respectively, with a discrimination efficiency of 98%. The polarization interference led to selective polarization excitation of the reflection spectra, and the calculated phase sensitivity agreed with the experimental results.
利用基于波长和相位调制的保偏少模布拉格光栅（PM-FMF-FBG），对温度和应变进行了同时测量，该光栅基于偶 LP11 模式。所测温度和应变的波长位移灵敏度和相位灵敏度分别为 10 pm·°C 和 0.73 pm·με，-3.2×10 rad·°C 和 4×10 rad·με，分辨效率为 98%。偏振干涉导致反射光谱的选择性偏振激发，计算出的相位灵敏度与实验结果相符。
