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Vol. 20, Special Issue, April 2013, pp.6-11

 

 

A Fast Responsive Refractometer Based on the Side-opened, Dual-core Photonic Crystal Fiber

 

1, a Jiang Jianhu, 1, b Jiao Wentan, 1, c Song Lijun

1 Dept. of Elc. & Auto, Luoyang Technology College, HeNan Luoyang, 471023

a jjh_0321@126.com, b wentanjiao@sina.com, c slj@lit.edu.cn

 

 

Received: 7 February 2013   /Accepted: 17 April 2013   /Published: 30 April 2013

Digital Sensors and Sensor Sysstems

 

Abstract: For enhancing the sensitivity properties and accelerating the responsive characteristics at the same time, a novel refractometer based on a side-opened, dual-core photonic crystal fiber and dual-beam coupling detecting mechanism is proposed and analyzed here. The improvement is replacing a part of air holes of conventional dual-core photonic crystal fiber by one large circular hole, while the laterial segment of this large circular hole is supposed to be side opened. This side-opened fiber configuration makes fast responsive characteristics by allowing fluidic target approaching one of the fiber cores laterally and quickly. The dual-beam coupling mechanism ensures a relative higher optical sensitivity. Numerical simulation results show that a sensitivity of 3.8e-5RIU could be achievable, which reflects its potential value on high sensitive and fast responsive detection applications. Besides, the relation of the optical sensitivity and the dynamic detected index range on this novel dual core photonic crystal fiber structure, optical mode polarization and the transmitting waveband is also analyzed.

 

Keywords: Dual core photonic crystal fiber, Fiber refractometer, Side opened, Dual beam coupling detection

 

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