实现宽光谱斜入射光束高效耦合的谐闪耀光栅研究  

Broadband Slanted-beam Coupling with High Efficiency by Harmonic Blazed Grating

作　　者：伊德尔[1] 刘海涛[1] 陆思[1] 谭峭峰[1] 严瑛白[1] 金国藩[1] 

机构地区：[1]清华大学精密测试技术及仪器国家重点实验室,北京100084

出　　处：《光电子．激光》2004年第6期633-636,共4页Journal of Optoelectronics·Laser

基　　金：国家重点基础研究"973"资助项目(G19990330);国家"863"高技术资助项目(863 804 2)

摘　　要：提出了谐闪耀光栅结构,可实现多波长或宽光谱斜入射光束的高效耦合。理论分析表明,谐闪耀光栅谐振波长数目随谐波数增加而增加,因此可用于多波长斜光束的高效耦合;当谐波数达到一定数值后,可实现宽光谱斜光束的高效耦合。针对可见光波段设计谐衍射光栅对大间隔离散三波长和宽光谱连续波长(500～600nm)斜入射光束分别实现了100%和大于80%的高效率耦合功能。A harmonic blazed grating was proposed.It can realize multi-wavelength or broadband slanted-beam coupling with high efficiency.Theoretical analysis shows that the number of working wavelength will increase with the increment of the harmonic number of the harmonic blazed grating.As a result,multi-wavelength beam coupling with high efficiency can be realized.If the harmonic number is large enough,broadband beam coupling with high efficiency can be realized.Multi-wavelength coupler and broadband coupler are designed through harmonic blazed gratings,respectively.The theoretical diffraction efficiency is 100% for multi-wavelength coupler and greater than 80% for broadband coupler.

关 键 词：谐闪耀光栅 斜光束耦合 谐振波长 谐衍射光栅 宽光谱 角谱理论 

分 类 号：O436.1[机械工程—光学工程]