Photonic Sensors, 2015, 5 (1): 79–83, Published Online: Jan. 20, 2015  

Nonlinear Refractive Index Measurement Utilizing Bistable Behavior of Double Coupling Optical Fiber Ring Resonator

Author Affiliations
Center for Information Photonics & Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu, 610031, China
Abstract
A novel approach for measuring the nonlinear refractive index of an optical fiber utlizing the bistable behavior of the double coupling optical fiber ring resonator was proposed and investigated. The switch-off or switch-on power decreases with an increase in the nonlinear refractive index n2 (m2/W), and the dependence of swith-off or switch-on power on the nonlinear refractive index was analyzed numerically. Simulation results showed that the switch-off power and switch-on power (in dBW) decreased linearly with 102log()n in a 100-m-length fiber ring resonator, when n2 changed from 3.2×10-20 m2/W to 2.5×10-17 m2/W or nearly n2=3.2×10-20 m2/W. These mean that high accuracy as well as large-scale nonlinear refractive index measurement can be achieved by the proposed approach.
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Lei YANG, Wei PAN, Bin LUO, Lianshan YAN. Nonlinear Refractive Index Measurement Utilizing Bistable Behavior of Double Coupling Optical Fiber Ring Resonator[J]. Photonic Sensors, 2015, 5(1): 79–83.

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