Temperature Sensing Using Frequency Beating Technique From Single-Longitudinal Mode Fiber Laser

Ahmad, Harith and Latif, Amirah Abdul and Zulkifli, Mohd Zamani and Awang, Noor Azura and Harun, Sulaiman Wadi (2012) Temperature Sensing Using Frequency Beating Technique From Single-Longitudinal Mode Fiber Laser. IEEE Sensors Journal, 12 (7). pp. 2496-2500. ISSN 1530-437X

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Official URL: https://doi.org/10.1109/JSEN.2012.2191401

Abstract

In this paper, a high-resolution fiber temperature sensor is proposed and demonstrated using the frequency beating technique. The sensor uses a constant wavelength (CW) at 1539.96 nm as the reference signal for the frequency beating technique. The sensor signal is provided by a fiber Bragg grating (FBG) tuned single-longitudinal mode (SLM) fiber laser, which consists of a 0.5-m long highly doped Zirconium-Erbium doped with an erbium concentration of 3000 ppm as the gain medium. The signal of the SLM, which is generated by the FBG in response to external temperature changes, is mixed with the CW signal using a 3-dB fused coupler into a 6-GHz photodetector to generate frequency beating. The typical response of the system is about 1.3 GHz/°C, with nominal temperature measurement resolutions of 0.0023 °C being achieved, taking into account the resolution bandwidth of 3 MHz of the radio frequency spectrum analyzer.

Item Type: Article
Uncontrolled Keywords: Dual-wavelength pulse; Erbium-doped fiber; Frequency generation; Saturable absorber
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 07 Jan 2019 04:43
Last Modified: 07 Jan 2019 04:43
URI: http://eprints.um.edu.my/id/eprint/19915

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