Kang, Kyumin Jang, Minsu Kim, Byung Kook Kim, Jun Sik Lim, Myo Taeg Kim, Jinseok 2024-01-19T17:00:40Z 2024-01-19T17:00:40Z 2021-09-02 2020-08-31 1094-4087 https://pubs.kist.re.kr/handle/201004/118236 In this study, a double-ring erbium-doped fiber (EDF) laser with an optical switch and a fiber Bragg grating (FBG)-referenced interrogating system was developed and demonstrated. This double-ring configuration can achieve high power amplified spontaneous emission, enabling laser oscillation even within the L-band. The output range and signal-to-noise ratio (SNR) of the double-ring EDF laser were measured to be 1512-1610 nm and 55 dB. In addition, the interrogating system using FBGs for reference resulted in precision improvement of similar to 25 pm over those achieved in previous studies, reaching a precision of about 7 pm. The high power, broad tuning range, and sufficiently high precision of the proposed interrogating system make it promising for use in FBG-based sensing applications. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement English OPTICAL SOC AMER WAVELENGTH-SWEPT LASER GRATING SENSOR SYSTEM STRAIN-SENSOR NM NONLINEARITY TEMPERATURE PERFORMANCE FBG-referenced interrogating system using a double-ring erbium-doped fiber laser for high power and broadband Article 10.1364/OE.403127 1 OPTICS EXPRESS, v.28, no.18, pp.26870 - 26881 OPTICS EXPRESS 28 18 26870 26881 scie scopus 000565713200101 2-s2.0-85090817160 Optics Optics Article WAVELENGTH-SWEPT LASER GRATING SENSOR SYSTEM STRAIN-SENSOR NM NONLINEARITY TEMPERATURE PERFORMANCE