| 基于透射型体布拉格光栅衍射效率的研究 |
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| 引用本文： | 李松柏,杨敏.基于透射型体布拉格光栅衍射效率的研究[J].西南农业大学学报,2011,33(9). |
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| 作者姓名： | 李松柏 杨敏 |
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| 作者单位： | 长江师范学院物理学与电子工程学院; |
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| 基金项目： | 重庆市教委科技基金资助项目(KJ091307) |
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| 摘 要： | 基于Kogelnik耦合波理论,推导了透射体布拉格光栅的衍射效率方程,数值仿真分析了折射率调制幅度、晶体厚度、相位失配参量、角度偏移量和波长偏移量等光栅写入参数对体光栅衍射效率的影响.结果表明:当入射波和衍射波没有发生相位失配时,衍射效率最大;当以布拉格角入射时,衍射效率将随介质的厚度和折射率的空间调制幅度的增加而增加;当入射光满足布拉格条件时,不同厚度和折射率调制幅度的体光栅衍射效率为100%;只要入射光偏离布拉格条件一个很小的量,体光栅衍射效率就会迅速下降;当偏离量超出一定范围,衍射效率就降低为0.同时,并非是体光栅折射率的空间调制幅度越深,衍射效率越高.
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| 关 键 词： | 透射体光栅 耦合波理论 光栅参数 衍射效率 |
Study of Diffraction Efficiency Based on Transmitting Volume Bragg Gratings |
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| LI Song-bai,YANG Min School of Physics & Electronics Engineering,Yangtze Normal University,Fuling Chongqing ,China.Study of Diffraction Efficiency Based on Transmitting Volume Bragg Gratings[J].Journal of Southwest Agricultural University,2011,33(9). |
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| Authors: | LI Song-bai YANG Min School of Physics & Electronics Engineering Yangtze Normal University Fuling Chongqing China |
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| Institution: | LI Song-bai,YANG Min School of Physics & Electronics Engineering,Yangtze Normal University,Fuling Chongqing 408100,China |
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| Abstract: | Based on Kogelnik's coupled-wave theory,Bragg grating diffraction efficiency equation of transmission body was derived.By numerical simulation,the effects on the grating diffraction of amplitude modulation of refractive index,crystal thickness,phase-mismatching parameters,offsets of angles and wavelengths were analyzed.The results showed that the maximal diffraction efficiency was obtained when phase-mismatching did not occur between the incident waves and the diffraction waves,and the diffraction efficienc... |
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| Keywords: | transmitting volume Bragg grating coupled wave theory grating parameter diffraction efficiency |
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