Dynamic performance of magneto-optical Bi-substituted rare-earth iron garnet  

作　　者：李世光 杨昌喜 章恩耀 金国藩 

机构地区：[1]State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua University, Beijing 100084

出　　处：《Chinese Optics Letters》2005年第1期38-41,共4页中国光学快报（英文版）

基　　金：ThisworkwasinpartsupportedbytheNational"863"ProjectofChina(No.2001AA312140)theTrans-CenturyTrainingProgrammeFoundationfortheTalentsbytheMinistryofEducationofChina.

摘　　要：The dynamic performances of magneto-optical Bi-substituted rare-earth iron garnet (BIG) under different external magnetic fields and at different frequencies are experimentally studied. The measurement data indicate that the Faraday rotation angle is almost proportional to the external magnetic field when the garnet is far less saturated, while there is good switch performance when it is saturated. The higher the working frequency is, the larger the saturation magnetic field and the phase delay of Faraday angle relative to the field. The saturation fields and the phase delays at different frequencies are measured. The dynamic performance of the BIG determines the performance of BIG-based optical devices. To get the better performance of such devices, the garnets with small dampness and large stiffness should be chosen elaborately.The dynamic performances of magneto-optical Bi-substituted rare-earth iron garnet (BIG) under different external magnetic fields and at different frequencies are experimentally studied. The measurement data indicate that the Faraday rotation angle is almost proportional to the external magnetic field when the garnet is far less saturated, while there is good switch performance when it is saturated. The higher the working frequency is, the larger the saturation magnetic field and the phase delay of Faraday angle relative to the field. The saturation fields and the phase delays at different frequencies are measured. The dynamic performance of the BIG determines the performance of BIG-based optical devices. To get the better performance of such devices, the garnets with small dampness and large stiffness should be chosen elaborately.

关 键 词：BISMUTH Faraday effect GARNETS Magnetooptical devices Optical rotation Rare earth compounds 

分 类 号：TM351[电气工程—电机]