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Sensors 2017, 17(2), 398; doi:10.3390/s17020398

Formation and Applications of the Secondary Fiber Bragg Grating

Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, China
This paper is an invited paper.
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Academic Editor: Christophe Caucheteur
Received: 15 December 2016 / Revised: 29 January 2017 / Accepted: 3 February 2017 / Published: 18 February 2017
(This article belongs to the Special Issue Recent Advances in Fiber Bragg Grating Sensing)
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Abstract

Being one of the most proven fiber optic devices, the fiber Bragg grating has developed continually to extend its applications, particularly in extreme environments. Accompanying the growth of Type-IIa Bragg gratings in some active fibers, a new resonance appears at the shorter wavelength. This new type of grating was named “secondary Bragg grating” (SBG). This paper describes the formation and applications of the SBGs. The formation of the SBG is attributed to the intracore Talbot-type-fringes as a result of multi-order diffractions of the inscribing beams. The SBG presents a variety of interesting characteristics, including dip merge, high-temperature resistance, distinct temperature response, and the strong higher-order harmonic reflection. These features enable its promising applications in fiber lasers and fiber sensing technology. View Full-Text
Keywords: fiber Bragg grating; photosensitivity; Talbot effect; distributed Bragg reflector fiber laser; high temperature resistance fiber Bragg grating; photosensitivity; Talbot effect; distributed Bragg reflector fiber laser; high temperature resistance
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Guan, B.-O.; Ran, Y.; Feng, F.-R.; Jin, L. Formation and Applications of the Secondary Fiber Bragg Grating. Sensors 2017, 17, 398.

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