| 部分相干脉冲高斯光束在远场的光谱异常行为 |
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| 引用本文： | 赵太福.部分相干脉冲高斯光束在远场的光谱异常行为[J].洛阳师范学院学报,2009,28(5):32-37. |
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| 作者姓名： | 赵太福 |
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| 作者单位： | 洛阳市广播电视大学,河南洛阳,471000 |
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| 摘 要： | 基于瑞利-索未菲衍射积分理论,推导出了部分相干脉冲高斯光束经光阑衍射后光谱的解析表达式,在此基础上研究了部分相干脉冲高斯光束在远场位相奇点附近出现的光谱异常行为及激光脉冲宽度T,截断参数δ,相干参数Δ对光谱开关和谱移的影响.结果表明,在临界衍射角θc附近光谱开关出现.激光束的脉冲宽度T,截断参数δ,相干参数Δ均影响衍射脉冲的远场光谱行为.通过改变脉冲周期T和截断参数δ及相干参数Δ可使光谱从红移到蓝移发生变化,这在信息编码中有潜在的应用.
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| 关 键 词： | 部分相干 高斯光束 光谱移动 光谱开关 |
Partial Coherent Pulse of The Gaussian Beam in the Far Field of Abnormal Behavior Spectrum |
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| ZHAO Tai-fu.Partial Coherent Pulse of The Gaussian Beam in the Far Field of Abnormal Behavior Spectrum[J].Journal of Luoyang Teachers College,2009,28(5):32-37. |
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| Authors: | ZHAO Tai-fu |
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| Institution: | Luoyang Broadcasting and TV University;Luoyang 471000;China |
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| Abstract: | Based on Rayleigh-Sommerfeld diffraction integral theory,this article deduces the spectrum analytic formula after parts of coherent pulse Gaussian beam diffracted by aperture diffraction,and on the basis of this study,researches some of coherent pulse Gaussian beam which is located in the vicinity of singular point appearing spectrum abnormal behavior,and obtains an influence of spectrum switch and spectrum shift caused by laser pulse width T,cut-off parameters,coherent parameters.The results show that spec... |
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| Keywords: | partial coherent Gauss beam spectral shift spectrum switch |
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