Acta Optica Sinica, Volume. 35, Issue 4, 406005(2015)
Fiber-Optic Humidity Sensing Based on Graphene
A novel fiber-optic humidity sensor is fabricated by using a side-polished fiber (SPF) coated with a film of reduced graphene oxide (rGO). The sensor can achieve power variation of up to 6.9 dB in the high humidity range [the relative humidity (RH) is 70% to 95% ], and display linear response with correlation coefficient of 98.2% , sensitivity of 0.31 dB/(%RH), response speed of faster than 0.13 (%RH)/s, and good repeatability in RH from 75% to 95%. Theoretical analysis of sensing mechanism can explain the experimental results, and reveal the broad applying prospect of the sensor for other kinds of chemical vapor detections. Relying on novel sensing mechanism, this graphene-based optical sensor provides a beneficial complement to graphene-based electrical chemical ones, and can promote the employment of graphene in chemical sensing techniques.
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Xiao Yi, Zhang Jun, Cai Xiang, Tan Shaozao, Chen Zhe, Yu Jianhui, Lu Huihui, Liao Guozhen, Li Shiping, Tang Jieyuan, Luo Yunhan. Fiber-Optic Humidity Sensing Based on Graphene[J]. Acta Optica Sinica, 2015, 35(4): 406005
Category: Fiber Optics and Optical Communications
Received: Nov. 10, 2014
Accepted: --
Published Online: Apr. 3, 2015
The Author Email: Yi Xiao (xiaoy109@sina.com)