Brillouin-based fiber-optic distributed temperature sensor with optical preamplification

被引：16

作者：

De Souza, K ^{[1
]}

Newson, TP

机构：

[1] Univ W Indies, Dept Phys, St Augustine, Trinidad Tobago

[2] Univ Southampton, Dept Elect & Comp Sci, Southampton SO17 1BJ, Hants, England

来源：

OPTICS LETTERS | 2000年 / 25卷 / 18期

关键词：

D O I：

10.1364/OL.25.001331

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Optical preamplification has been used in a fiber-optic distributed temperature sensor based on spontaneous Brillouin scattering and the use of direct detection, resulting in improved signal-to-noise ratios. The fiber-based optical preamplifier system comprises a three-port circulator, an erbium-doped fiber amplifier with a small-signal gain of 27 dB, and a fiber Bragg grating with 47-GHz bandwidth. An improvement of 17 dB in the optical signal-to-noise ratio for the Brillouin signal is demonstrated in a 23-km sensor. The limit to the signal-to-noise ratio is attributed to spontaneous-spontaneous beat noise generated at the photodetector by amplified spontaneous emission from the optical amplifier. (C) 2000 Optical Society of America.

引用

页码：1331 / 1333

页数：3