Temperature sensing using frequency beating technique from single-longitudinal mode fiber laser

Ahmad, Harith and Abdul Latif, Amirah 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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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 (Journal)
Additional Information:	8870/84325
Uncontrolled Keywords:	Dual-wavelength pulse, erbium-doped fiber, frequency generation, saturable absorber
Subjects:	Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Physics
Depositing User:	Dr M Z Zulkifli
Date Deposited:	24 Nov 2020 21:08
Last Modified:	24 Nov 2020 21:08
URI:	http://irep.iium.edu.my/id/eprint/84325

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