학술논문
High Extinction Ratio Magneto-Optical Fiber Modulator Based on Nanoparticle Magnetic Fluids
Document Type
Periodical
Author
Source
IEEE Photonics Journal IEEE Photonics J. Photonics Journal, IEEE. 4(4):1140-1146 Aug, 2012
Subject
Language
ISSN
1943-0655
1943-0647
1943-0647
Abstract
A novel magneto-optical fiber modulator with a high extinction ratio (ER) based on a polarization interference structure is proposed. A magnetic fluid (MF) film and a section of a polarization-maintaining fiber (PMF) are inserted into the structure to generate a suitable sinusoidal interference spectrum for light modulation. The MF film leads to a spectrum shift under external magnetic field due to its magnetically controllable birefringence, whereas the PMF is used to control the period of the interference spectrum. In this experiment, magneto-optical modulation with a high ER of 38 dB is demonstrated.