Coupled-mode theory for magneto-optical fiber Bragg grating under non-uniform magnetic field  

作　　者：刘芬 武保剑 卢鑫 

机构地区：[1]Key Lab. of Broadband Optical Fiber Transmission and Communication Networks of Education Ministry of China, University of Electronic Science and Technology of China

出　　处：《Optoelectronics Letters》2011年第5期354-357,共4页光电子快报（英文版）

基　　金：supported by the National High Technology Research and Development Program of China (No.2009AA01Z216);the National Basic Research Program of China (No.2011CB301703);the Program for New Century Excellent Talents in University (No.NCET-2008)

摘　　要：According to the perturbation theory, the coupled-mode equations for guided optical waves in the magneto-optical fiber Bragg gratings （MFBGs） under non-uniform magnetic field are derived. The equivalent relation between the magnetically- induced non-uniform fiber Bragg grating （MuFBG） and the corresponding non-magnetic chirped grating is expressed and verified by the piecewise-uniform MFBG model under linear magnetic field. On the basis of the equivalent relation, the MnFBGs can be effectively investigated by means of simulations. The characteristics of the MnFBGs under three typical magnetic field distributions with application to optical pulse compression are simulated, and the minimal pulse width can be achieved for the same magneto-optical coupling parameter of 2.2 ×10^3 m^-1.

关 键 词：Magnetic fields Magnetos Perturbation techniques 

分 类 号：TN253[电子电信—物理电子学] O441[理学—电磁学]