A Novel Structured Magnetic Field Sensor Based on Photonic Crystal Fiber Filled with Magnetic Fluid

Abstract

A novel structured magnetic field sensor based on dual-core photonic crystal fiber is proposed which has two elliptical central holes filled with magnetic fluid and some elliptical cladding air holes. The transmission characteristics of the dual-core photonic crystal fiber such as coupling length, birefringence, and coupling loss are analyzed with changing structural parameters. Enhanced birefringence is obtained by the novel structure of two elliptical central holes and some elliptical cladding air holes. The sensitivity of the magnetic sensor is calculated, and the numerical simulation result shows that the highest sensitivity of 1200 pm/Oe can be achieved.

Keywords

• magnetic field sensor
• magnetic fluids
• elliptical holes
• photonic crystal fiber