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Proceedings Paper

Wavelength locking of double FBG and its application in fiber sensing system
Author(s): Ming Chang Shih; Shieh Yueh Yang; Yi Shen Chen; Yi Tung Shiu; Yi Chiun Shen; Tzung Yu Shei
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Paper Abstract

In this paper we demonstrated a fiber sensing system using the method of wavelength locking of two nearly identical fiber Bragg gratings (FBG) to interrogate the wavelength shift by directly measuring the intensity of the reflection from the sampling FBG. The light source of the sensing system is based on a fiber ring laser structure in which a reference FBG is used for locking the wavelength of the fiber ring laser pumped by a 980 nm laser diode to achieve lasing at 1555.85 nm. The wavelength locking method is able to an effective way of interrogating the wavelength shifting of a FBG by the intensity of the reflection from the sampling FBG, and is able to achieve real time sensing of the physical perturbations. In addition, the characteristics of the fiber sensing system for dynamic vibration and the key factors to acquire stable sensing are discussed.

Paper Details

Date Published: 22 April 2006
PDF: 7 pages
Proc. SPIE 6189, Optical Sensing II, 61890C (22 April 2006);
Show Author Affiliations
Ming Chang Shih, National Univ. of Kaohsiung (Taiwan)
Shieh Yueh Yang, National Taiwan Normal Univ. (Taiwan)
Yi Shen Chen, National Univ. of Kaohsiung (Taiwan)
Yi Tung Shiu, National Univ. of Kaohsiung (Taiwan)
Yi Chiun Shen, National Univ. of Kaohsiung (Taiwan)
Tzung Yu Shei, National Univ. of Kaohsiung (Taiwan)


Published in SPIE Proceedings Vol. 6189:
Optical Sensing II
Brian Culshaw; Anna G. Mignani; Hartmut Bartelt; Leszek R. Jaroszewicz, Editor(s)

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