Fiber Bragg grating temperature sensor coated with graphene thin film

Huisong Zhang; Li Wang; Xueqiong Su; Huanhuan Yan; Jin Wang; Peng Cheng

doi:10.1117/12.2547299

18 December 2019 Fiber Bragg grating temperature sensor coated with graphene thin film

Huisong Zhang, Li Wang, Xueqiong Su, Huanhuan Yan, Jin Wang, Peng Cheng

Proceedings Volume 11340, AOPC 2019: Optical Fiber Sensors and Communication; 113400W (2019) https://doi.org/10.1117/12.2547299
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

Abstract

As a key research material, graphene has high thermal expansion coefficient and heat conductivity. FBG with cladding by coated graphene can effectively improve temperature sensing characteristics according to the temperature sensing principle of FBG. Firstly, after removing the coating on FBG surface with acetone and stripping pliers, graphene nanosheets were deposited on the cladding material of FBG by a simple evaporative deposition method. The temperature sensing sensitivity 13.05 pm/°C was obtained in experiment after linear fitting of data, which was about 67% higher than that of bare FBG of 7.82pm/°C. Secondly, in order to improve the purity, compactness and controllable thickness of the coatings, we deposit graphene films of FBG cladding with coating process in vacuum by pulsed laser deposition (PLD) technology. Finally, the temperature sensing sensitivity of the FBG sensor coated with graphene thin film by PLD reached 17.31 pm/°C, which was about 120% higher than that before deposition. Moreover, the whole temperature sensing system of FBG with cladding graphene film has simple structure and high practicability

Citation Download Citation

Huisong Zhang, Li Wang, Xueqiong Su, Huanhuan Yan, Jin Wang, and Peng Cheng "Fiber Bragg grating temperature sensor coated with graphene thin film", Proc. SPIE 11340, AOPC 2019: Optical Fiber Sensors and Communication, 113400W (18 December 2019); https://doi.org/10.1117/12.2547299

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