A fiber ring laser for temperature sensing based on in-fiber Mach-Zehnder interferometer

Xudong Zhang; Jiping Liu; Liangtao Hou; Lingling Ran; Jiuru Yang

doi:10.1117/12.2504740

15 November 2018 A fiber ring laser for temperature sensing based on in-fiber Mach-Zehnder interferometer

Xudong Zhang, Jiping Liu, Liangtao Hou, Lingling Ran, Jiuru Yang

Proceedings Volume 10964, Tenth International Conference on Information Optics and Photonics; 109640W (2018) https://doi.org/10.1117/12.2504740
Event: Tenth International Conference on Information Optics and Photonics (CIOP 2018), 2018, Beijing, China

Abstract

In this paper, a novel fiber ring laser (FRL) is proposed and investigated based on modal interference. Through core-offset splicing technique, an in-fiber Mach-Zehnder interferometer (MZI) is fabricated based on thin-core fiber and single mode fibers. Its distribution of light filed is comprehensively analyzed by beam propagation method. The FRL is then setup, in which the fabricated MZI is used as a band-pass filter. The output of laser is controlled and optimized by accurately adjusting the state of polarization controller. The experimental results show that, the extinction ratio of lasing wavelength reaches 39.8 dB, and the line width is less than 0.1 nm. Moreover, the proposed FRL is applied in temperature sensing, and the tested sensitivity reaches 122.7 pm/°C with the linearity of 0.9982. In addition, by calculation, the amplitude noise and the spectrum resolution are 8.84×10^-3 nm and 2.89×10^-3 nm, respectively. Therefore the detection limit in this laser sensor is about 0.07°C, which is obviously higher than that in passive fiber optic sensor.

Citation Download Citation

Xudong Zhang, Jiping Liu, Liangtao Hou, Lingling Ran, and Jiuru Yang "A fiber ring laser for temperature sensing based on in-fiber Mach-Zehnder interferometer", Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 109640W (15 November 2018); https://doi.org/10.1117/12.2504740

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KEYWORDS

Fiber lasers

Single mode fibers

Refractive index

Fiber optics sensors

Interferometers

Mach-Zehnder interferometers

Beam propagation method

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