Wavelength locking of double FBG and its application in fiber sensing system

Ming Chang Shih; Shieh Yueh Yang; Yi Shen Chen; Yi Tung Shiu; Yi Chiun Shen; Tzung Yu Shei

doi:10.1117/12.662377

22 April 2006 Wavelength locking of double FBG and its application in fiber sensing system

Ming Chang Shih, Shieh Yueh Yang, Yi Shen Chen, Yi Tung Shiu, Yi Chiun Shen, Tzung Yu Shei

Proceedings Volume 6189, Optical Sensing II; 61890C (2006) https://doi.org/10.1117/12.662377
Event: SPIE Photonics Europe, 2006, Strasbourg, France

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.

Citation Download Citation

Ming Chang Shih, Shieh Yueh Yang, Yi Shen Chen, Yi Tung Shiu, Yi Chiun Shen, and Tzung Yu Shei "Wavelength locking of double FBG and its application in fiber sensing system", Proc. SPIE 6189, Optical Sensing II, 61890C (22 April 2006); https://doi.org/10.1117/12.662377

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