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 to excite a TBG and a long probe pulse to map the transient Brillouin grating spectrum (TBGS) associated with the birefringence. The pump pulses defines a spatial resolution of 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 .
© 2009 Optical Society of America
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