近红外可调式磁光隔离器  

Adjustable magneto-optical isolator in near-infrared region

作　　者：虞志强 宋慧德 张冬喜 刘公强 刘湘林[2] 傅方耀 

机构地区：[1]上海交通大学应用物理系 [2]中国科学院上海冶金研究所

出　　处：《中国激光》1990年第1期18-22,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金资助项目

摘　　要：研制了近红外可调式磁光隔离器。计算了亚铁磁性材料磁光旋转的色散关系;设计了可调式磁场系统。有效地改善了磁光晶体的温度特性,外界强磁场和时间老化等因素对磁光隔离器性能的影响;降低了晶体加工的精度要求,提高了磁光隔离器的实用价值。在入射光波长1.3μm和室温条件(27～25℃)下进行了器件性能测试,获得了正向插入损耗<1.8dB,反向隔离比>29dB的实验结果。A new adjustable magneto-optical isolator in near-infrared region is repotod. Based on the theoretical analysis an adjustable magnetic field system is designed for 45° Faraday rotator, getting a 1.0°-1.5° adjustable region under the condition of saturation, by which the characteristics of magneto-optical isolator are improved effectively that are influenced by the temperature characteristics of magneto-optical crystal, strong external magnetic firld, ageing effect of device and so on. The experimental results are obtained at 1.3μm and at room temperature(r=25℃).Its insertion loss is less than 1.8dB and isolation is over 29dB.

关 键 词：磁光隔离器 近红外 光纤通信 

分 类 号：TN929.1[电子电信—通信与信息系统]