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A wide temperature tunable fibre laser using a chirped grating and a type IIA fibre Bragg grating

Mandal, Jharna and Sun, Tong and Grattan, Kenneth and Augousti, Andreas and Wade, Scott A and Collins, Stephen F and Baxter, Gregory W and Dussardier, Bernard and Monom, Gerard (2004) A wide temperature tunable fibre laser using a chirped grating and a type IIA fibre Bragg grating. Measurement science & technology, 15 (6). pp. 1113-1119. ISSN 0957-0233

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Abstract

A fibre laser sensor has been developed to operate over a wide temperature range from room temperature to 440 °C, where the laser cavity has been formed using a combination of a chirped grating and a type IIA fibre Bragg grating (FBG), enclosing a length of erbium doped fibre as the active gain medium. A FBG stabilized 1480 nm laser diode was employed as the pump source to achieve laser oscillation associated with the type IIA Bragg grating wavelength on the wavelength band around 1550 nm. The broadband-chirped grating was used as one of the cavity end reflectors to achieve temperature-tunable laser action for sensing applications over a wide range. The sensitivity of the sensor was found to be 13.94 pm °C−1 with a root mean square error of 8.85 °C. The primary advantage of this laser-based sensor over passive optical fibre sensors is the significant improvement in both the signal-to-noise ratio and the narrow linewidth of the laser signal, making it especially well suited to multiplexing situations.

Item Type: Article
Uncontrolled Keywords: ResPubID: 7449, fibre-laser sensors, temperature sensing, fibre Bragg gratings (FBGs), chirped and normal type IIA gratings, high germanium–erbium co-doped fibre, erbium-doped fibre
Subjects: FOR Classification > 0906 Electrical and Electronic Engineering
Faculty/School/Research Centre/Department > School of Engineering and Science
Depositing User: VUIR
Date Deposited: 04 Dec 2009 04:39
Last Modified: 19 Jul 2011 02:15
URI: http://vuir.vu.edu.au/id/eprint/2122
DOI: 10.1088/0957-0233/15/6/010
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Citations in Scopus: 6 - View on Scopus

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