Direct Writing of Long Period Fiber Gratings on Multi-core Fiber and Its Sensing Application

• DOI: 10.1364/isst.2019.jw4a.6
• Publication Date: 2020-02-25T10:38:48Z
• Authors: Jie Wang; Chao Jiang; Di Cheng; Hangyu Dong; Changning Liu; Jibing Liu; Simei Sun
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

Long period fiber gratings were written directly on multi-core fiber (MCF) with high frequency CO2laser. The two resonant depths offer the capabilities for achieving measurement of temperature and strain. The maximum temperature sensitivity was 70.3 pm/℃ and the strain sensitivity was 0.00307 dB/μe. The measurement matrix obtained by resonant depth (dip 2) can avoid cross sensitivity and realize the simultaneous measurement of temperature or strain.