High-birefringence fiber loop mirror sensor using a WDM fused fiber coupler

被引：5

作者：

Passos, D. J. ^{[1
,2
]}

Marques, Manuel J. ^{[1
,2
]}

Frazao, Orlando ^{[1
]}

机构：

[1] INESC Porto, P-4169007 Oporto, Portugal

[2] Univ Porto, Fac Ciencias, P-4169007 Oporto, Portugal

来源：

OPTICS LETTERS | 2013年 / 38卷 / 15期

关键词：

SAGNAC INTERFEROMETER; STRAIN;

D O I：

10.1364/OL.38.002927

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An intensity-based highly birefringent (Hi-Bi) fiber loop mirror (FLM) sensor is proposed which uses a wavelength-division multiplexing (WDM) fiber coupler. The effect of integrating the WDM coupler in a FLM configuration is first studied. A section of Hi-Bi (bow-tie) fiber of length 0.26 m is then placed in the fiber loop, making the spectral response of the device simultaneously dependent on the Hi-Bi fiber section and WDM coupler characteristics. When strain is applied to the sensing head, the spectral signal is modulated in amplitude, in contrast with the conventional Hi-Bi FLM sensors in which there are wavelength shifts. The sensor was characterized in strain and a sensitivity of (-2.2 +/- 0.4) x 10(-3) mu epsilon(-1) for a range of 300 mu epsilon was attained. The self-referenced character of the sensor is noted. (C) 2013 Optical Society of America

引用

页码：2927 / 2929

页数：3

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