方形波导激光器的反射耦合研究  

Research on Reflection Coupling of Square Waveguide Laser

作　　者：朱钧[1] 陈钰清[2] 王静环[2] 

机构地区：[1]清华大学精密仪器测试技术与仪器国家重点实验室,北京100084 [2]浙江大学近代光学仪器国家重点实验室,浙江杭州310027

出　　处：《中国激光》2006年第1期34-38,共5页Chinese Journal of Lasers

摘　　要：针对方形波导激光器的反射耦合问题提出了一种采用柱面反射镜的新型耦合方式。应用衍射理论详细推导了柱面反射镜和球面反射镜对方形波导激光器的耦合效率。通过数值计算分别得到采用球面反射镜时,EH11模和EH21模的耦合效率对反射镜曲率半径R的关系曲线,以及采用柱面反射镜时EH11模,EH21模和EH12模的耦合效率曲线。通过对比,得到波导口到反射镜距离d较小的时候,柱面反射镜对EH11模具有与球面反射镜接近的耦合效率。同时相对球面反射镜,柱面反射镜对EH21模和EH12模具有更强的抑制作用。在d较大时,相对球面反射镜柱面反射镜对EH21模的抑制作用将会变得更强,而对EH12模的抑制作用将会减弱。A new coupling mode using cylindrical mirror in square waveguide is presented in this paper. And the coupling efficiencies of the cylindrical mirror and the spherical mirror are studied and compared with diffraction theory. When the square mirror is used, the couple efficiency versus square mirror radius R for EH11 and EH21 mode are caculated numerically. In the same way, the couple efficiencies of EH11 , EH21 and EH12 modes are calculated when the cylindrical mirror is used. The results show that as the distance of waveguide to mirror is short, the couple efficiencies for EHu mode of the cylindrical mirror and the spherical mirror are similar but the cylindrical mirror has stronger restraining function on EH21 and EH12 modes, and as the distance of waveguide to mirror is long, the cylindrical mirror has more restraining function on EH21 mode and less restraining function on EH12 mode.

关 键 词：激光技术 反射耦合 衍射 波导激光器 正方形波导 柱面反射镜 

分 类 号：TN248.22[电子电信—物理电子学]