波导光栅的衍射光谱分析与实验  

The diffraction spectra of the waveguide grating:analysis and experiment

作　　者：翟天瑞[1] 刘大禾[2] 张新平[1] 王丽[1] 

机构地区：[1]北京工业大学应用数理学院,北京100124 [2]北京师范大学物理系,北京100875

出　　处：《大学物理》2013年第3期1-3,7,共4页College Physics

基　　金：国家自然科学基金面上项目(11074024;11104007);北京市教委科技计划面上项目(KM201210005034)资助

摘　　要：推导了波导光栅衍射光谱的解析解;分析了光栅周期、波导厚度等结构参数对衍射光谱的影响:光栅周期每增大/减小1 nm,衍射光谱中的共振峰位增大/减小1 nm,波导厚度每增大/减小1 nm,衍射光谱中的共振峰位增大/减小0.125 nm;设计了相应的实验方案验证了解析解的可靠性,并讨论了波导光栅结构应用于激光腔和高方向性发射器件的可行性.The analytical solution of the diffraction spectra of waveguide grating is deduced. Then the influence of the thickness of the waveguide and the period of the grating on the diffraction spectra is studied by using the analytical solution. It is found that the resonance wavelength moves to the red with increasing the period of the grating （the thickness of the waveguide） , the tuning rate is measured to be about 1 nm （0. 125 nm） spectral shift per 1 nm increasing in grating period （the waveguide thickness）. The theoretical analysis is in well agreement with the experimental result. Some potential applications of the waveguide grating in the laser cavity and the highly directional emission device are also discussed.

关 键 词：光栅 波导 耦合输出 衍射光谱 

分 类 号：O436.1[机械工程—光学工程]