All-Fiber Dual-Parameter Sensor Based on Cascaded Long Period Fiber Grating Pair Fabricated by Femtosecond Laser and CO2 Laser. Issue 2 (4th March 2018)

• Record Type: Journal Article
• Authors: Zhang, Wen; Hao, Jiaqi; Lou, Xiaoping; Dong, Mingli; Zhu, Lianqing
• Is Part Of: Fiber and integrated optics. Volume 37:Issue 2(2018)
• Page Start: 66
• Page End: 78
• Publication Date: 2018-03-04
• Subjects: Dual-parameter measurement -- femtosecond laser micromachining -- long period fiber grating pair -- strain characterization -- temperature characterization; Fiber optics -- Periodicals; Integrated optics -- Periodicals; Optical communications -- Periodicals; 621.3692
• DOI: 10.1080/01468030.2018.1444826
• Languages: English
• ISSNs: 0146-8030

Abstract

ABSTRACT: An all-fiber dual-parameter sensor based on cascaded long period grating pair fabricated by femtosecond laser and CO2 laser has been proposed and realized both theoretically and experimentally. The resonant wavelengths of LPFGs are 1557.80 nm and 1590.88 nm. In the strain range of 0–400 με, strain sensitivities are −7.2 pm/με for C-LPFG and −1.6 pm/με for F-LPFG. In the temperature range of 30–70°C, temperature sensitivities are −41.1 pm/°C for C-LPFG and −21.2 pm/°C for F-LPFG. By analyzing the resonant wavelength characterization, the proposed sensor can be efficiently used for dual-parameters measurement with promising application prospect and great research reference value.