We describe an experimental distributed temperature sensor that uses the temperature dependence of the Brillouin frequency shift. When a 22.2-km sensing length is used, we have observed a temperature resolution of 1°C and have obtained a spatial resolution of 10 m.
© 1993 Optical Society of America
Original Manuscript: December 15, 1992
Published: April 1, 1993
X. Bao, D. J. Webb, and D. A. Jackson, "22-km distributed temperature sensor using Brillouin gain in an optical fiber," Opt. Lett. 18, 552-554 (1993)