用于冷原子研究的小型集成化法拉第磁光隔离器

量子电子学报 , 2014, 31(5): 547-553. doi: 10.3969/j.issn.1007-5461.2014.05.006

用于冷原子研究的小型集成化法拉第磁光隔离器

张龙毅 ^1, , 李诗哲 ^2, , 李辰 ^3, , 林斌 ^4, , 杨仕锋 ^5, , 马兆远 ^6, , 陈徐宗 ^7, , 齐向晖 ^8,

1.北京大学信息科学技术学院,北京 100871

2.北京大学信息科学技术学院,北京 100871

3.北京大学信息科学技术学院,北京 100871

4.北京大学信息科学技术学院,北京 100871

5.北京大学信息科学技术学院,北京 100871

6.中国科学院上海光学精密机械研究所,上海 201800

7.北京大学信息科学技术学院,北京 100871

8.北京大学信息科学技术学院,北京 100871

基金项目: Supported by the National Natural Science Foundation of China(61027016,61078026,10934010) and the National Fundamental Research Program of China (2011CB921501)

关键词：激光器件 , 法拉第磁光隔离器 , 数值模拟 , 玻色-爱因斯坦凝聚 , 冷原子

Small and integrated Faraday optical isolator for cold atom research

Keywords： laser devices , Faraday optical isolator , numerical simulation , Bose-Einstein condensation , cold atom

研制了一种高均匀性、小型化的法拉第磁光隔离器,用于780 nm波长的光路中,并对设计方案进行了数值模拟和验证.采用了新颖的三段式“π”形磁体的组合设计方案,提高了剩磁利用率.隔离器整体体积为52 cm3,其中磁体体积为18 cm3,是相当小的.它的通光孔径为5 mm,隔离比为34.6 dB,透过率为90.9％.与之类似的“Ⅱ”型磁体体积更小,磁场均匀性稍差,也是可行的设计方案.成品隔离器比商用隔离器磁场均匀度更高,体积更小,隔离比更高,可以有效满足研发中的冷原子平台的小型化、高精度需求.

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