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 (2ns) to excite a TBG and a long probe pulse (6ns) to map the transient Brillouin grating spectrum (TBGS) associated with the birefringence. The 2ns pump pulses defines a spatial resolution of 20cm 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°C.

© 2009 Optical Society of America

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