Laser Physics

, 18:1044

Inclination sensing based on a fiber-ring laser and a fiber-Bragg grating with a precise resolution

Fiber Optics

DOI: 10.1134/S1054660X08090089

Cite this article as:
Liaw, S.K. & Hong, K.L. Laser Phys. (2008) 18: 1044. doi:10.1134/S1054660X08090089

Abstract

We design an inclination-sensing system based on a fiber-ring laser integrated fiber-Bragg grating (FBG) whose peak wavelength is changed by the axial strain. By replacing a conventional broadband light source with the fiber-ring laser, we raise the sensing power to 3.1 dBm, the peak-to-noise ratio to 65.31 dB, and reduce the 3-dB bandwidth to 0.06 nm. Thus, the sensitivity and resolution of the proposed system are greatly improved. By using an FBG integrated with a pendulum ball used as a sensor head, the resolution of the angular inclination could reach 0.015 nm per degree. These specifications are qualified for the general practice of the pendulum-sensing system.

PACS numbers

42.55.Wd 42.81.Wg 42.81.Pa 

Copyright information

© Pleiades Publishing, Ltd. 2008

Authors and Affiliations

  1. 1.Department of Electronic EngineeringNational Taiwan University of Science and TechnologyTaipeiChina
  2. 2.Institute of Electro-Optical EngineeringNational Taiwan University of Science and TechnologyTaipeiChina

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