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Miniature optical fiber current sensor based on a graphene membrane
Author(s) -
Zheng BiCai,
Yan ShaoCheng,
Chen JinHui,
Cui GuoXin,
Xu Fei,
Lu YanQing
Publication year - 2015
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201500077
Subject(s) - graphene , materials science , nanoelectromechanical systems , optoelectronics , optical fiber , fiber optic sensor , current (fluid) , response time , sensitivity (control systems) , fiber , electrode , nanotechnology , optics , electronic engineering , electrical engineering , computer science , composite material , nanomedicine , chemistry , physics , computer graphics (images) , engineering , nanoparticle
The unique electronic and mechanical properties, of graphene make it an ideal material for nanoelectromechanical system (NEMS) applications. Here, a miniature optical fiber current sensor based on a quasistatic graphene NEMS with a graphene membrane covering the hole on a pre‐etched fiber tip and two gold electrodes on opposite sides of the tip has been demonstrated. The sensor overcomes the shortcomings of conventional optical fiber current sensors based on thermal effects, such as relatively low sensitivity, long response time, and huge device size; it has simultaneously a high sensitivity of 2.2 × 10 5 nm/A 2 , a short response time of ∼0.25 s and a compact device size of ∼15 μm, and has found practical application. Using a smaller graphene membrane with better quality can reduce the response time to submillisecond levels with a more precise measurement system. The sensor presented in this paper may pave the way for the practical usage of optical fiber current sensors based on thermal effects.