Real-time displacement measurement by using EDF sigma laser with double-pass cascaded-chirped long-period fiber grating

K. Fukushima; A. Wada; M. Okano; S. Tanaka; F. Ito

doi:10.1117/12.2619921

17 May 2022 Real-time displacement measurement by using EDF sigma laser with double-pass cascaded-chirped long-period fiber grating

K. Fukushima, A. Wada, M. Okano, S. Tanaka, F. Ito

Author Affiliations +

Proceedings Volume 12139, Optical Sensing and Detection VII; 121391A (2022) https://doi.org/10.1117/12.2619921
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Conference Poster

Abstract

A novel Erbium-doped fiber laser sensor based on a sigma-type cavity configuration using a double-pass cascadedchirped long-period fiber grating (C-CLPG) as a reflective sensor section is proposed for a real-time displacement sensor, in which the double-pass C-CLPG is provided by returning the transmitted light of the C-CLPG with a Faraday rotator mirror (FRM) in the σ-branch of the cavity. The σ-branch with FRM-reflection realizes a compensation effect for the polarization fluctuations in the sensor section, a stable oscillation output during the sensing operation, and a suitable arrangement for remote sensing. In the experiment, we have successfully demonstrated a real-time displacement measurement based on bending characteristics of the C-CLPG, taking advantage of laser-type sensors.

Citation Download Citation

K. Fukushima, A. Wada, M. Okano, S. Tanaka, and F. Ito "Real-time displacement measurement by using EDF sigma laser with double-pass cascaded-chirped long-period fiber grating", Proc. SPIE 12139, Optical Sensing and Detection VII, 121391A (17 May 2022); https://doi.org/10.1117/12.2619921

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