光折变晶体中非相干光前向耦合及其对噪音栅擦除的研究  

Study of the Coupling of Mutually Incoherent Beams in Forward Direction and Fanning Reduction by Using Incoherent Erasure

作　　者：丁欣[1] 王鹏[1] 朱孟[1] 姚建铨[1] 王奎雄[2] 李卓[2] 禹宣伊 

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072 [2]长春光学精密机械学院应用理学分院,长春130022

出　　处：《中国激光》2000年第6期561-566,共6页Chinese Journal of Lasers

基　　金：教育部光电信息技术科学开放实验室资助项目

摘　　要：对光折变晶体 Ce:KNSBN中两束 e偏振简并非相干光的前向耦合进行了理论分析和实验研究 ,并通过非相干光耦合作用在实验上获得了亮环和暗环的衍射图样 ,从而获得了一种利用非相干光擦除来克服光折变晶体中扇形效应的简便方法。The coupling of two mutually incoherent beams of extraordinary polarization of degenerate wavelengths in the forward direction in photorefractive Ce∶KNSBN crystal is theoretically analyzed and experimentally demonstrated. The bright and dark rings due to coupling of two incoherent beams were observed and a new method of fanning reduction by using incoherent erasure are proposed in photorefractive crystal.

关 键 词：非相干光耦合 噪音栅擦除 光折变晶体 

分 类 号：O436[机械工程—光学工程] O734[理学—光学]