Title of article :
In-fiber Mach–Zehnder interferometer formed by large lateral offset fusion splicing for gases refractive index measurement with high sensitivity
Author/Authors :
Duan، نويسنده , , De-Wen and Rao، نويسنده , , Yun-Jiang and Xu، نويسنده , , Lai-Cai and Zhu، نويسنده , , Tao and Wu، نويسنده , , Di and Yao، نويسنده , , Jun، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
Abstract :
A versatile, compact and sensitive in-fiber open cavity Mach–Zehnder interferometer (MZI) gas refractive index (RI) sensor formed by fusion splicing a short section of single-mode fiber (SMF) between two sections of single-mode fibers with a large intentional lateral offset is demonstrated. The fabrication is easy, safe, and cost effective. Gas or other materials can contact with the light signal in the totally open cavity of sensor directly and easily, thus the ambient refractive index (RI) change can be detected very quickly. We discussed the fabrication and operation of the sensor, and we successfully used the sensor to monitor changes of refractive index of air as a function of pressure and obtained a sensitivity of over 3402 nm/RIU (refractive index unit) with good linearity and repeatability.
Keywords :
Refractive index , Fiber-optics sensors , GAS , Mach–Zehnder interferometer
Journal title :
Sensors and Actuators B: Chemical
Journal title :
Sensors and Actuators B: Chemical