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Updated: Jun 20, 2026
Fabrication and Testing of Photonic Thermometers
Published on: October 24, 2018
Distributed temperature sensing based on birefringence effect on transient Brillouin grating in a
Yongkang Dong1, Xiaoyi Bao, Liang Chen
1Fiber Optical Group, Physics Department, University of Ottawa, Ottawa, Canada, K1N 6N5.
Abstract:
We demonstrate a time-domain distributed temperature sensing based on birefringence effect on transient Brillouin grating (TBG) in a polarization-maintaining photonic crystal fiber (PM-PCF), which uses two short pump pulses (2 ns) to excite a TBG and a long probe pulse (6 ns) to map the transient Brillouin grating spectrum (TBGS) associated with the birefringence. The 2 ns pump pulses defines a spatial resolution of 20 cm and a temperature measurement range of a few hundred degrees Celsius, and the long probe pulse provides a narrow TBGS with a temperature resolution of 0.07 degrees C.
