z-logo
open-access-imgOpen Access
Intracavity interrogation of an array of fiber Bragg gratings
Author(s) -
Walter Margulis,
Robert Lindberg,
Fredrik Laurell,
Gunnar Hedin
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.414094
Subject(s) - fiber bragg grating , optics , materials science , laser linewidth , interrogation , phosfos , grating , optoelectronics , optical amplifier , fiber optic sensor , long period fiber grating , laser , fiber laser , optical fiber , wavelength , dispersion shifted fiber , physics , archaeology , history
In this work, we explore the interrogation of an array of fiber Bragg gratings as part of a laser cavity. A semiconductor optical amplifier in a sigma-shaped fiber cavity provides gain and is gated periodically at a rate that matches the roundtrip time associated with each grating of the array. The interrogator exhibits clear laser properties such as a threshold and linewidth narrowing. Besides improving the signal-to-noise ratio and enabling the re-use of wavelengths, it is found that this interrogation scheme enables monitoring of weak gratings spaced by less than 1 cm. Intracavity grating interrogation studied here is found to be a simple and powerful way to increase the number of sensor points for industrial applications.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.
Having issues? You can contact us here