欢迎来到麦多课文档分享! | 帮助中心 海量文档,免费浏览,给你所需,享你所想!
麦多课文档分享
全部分类
  • 标准规范>
  • 教学课件>
  • 考试资料>
  • 办公文档>
  • 学术论文>
  • 行业资料>
  • 易语言源码>
  • ImageVerifierCode 换一换
    首页 麦多课文档分享 > 资源分类 > PPT文档下载
    分享到微信 分享到微博 分享到QQ空间

    Beam propagation in anizotropic crystals.ppt

    • 资源ID:378880       资源大小:656KB        全文页数:9页
    • 资源格式: PPT        下载积分:2000积分
    快捷下载 游客一键下载
    账号登录下载
    微信登录下载
    二维码
    微信扫一扫登录
    下载资源需要2000积分(如需开发票,请勿充值!)
    邮箱/手机:
    温馨提示:
    如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
    如需开发票,请勿充值!如填写123,账号就是123,密码也是123。
    支付方式: 支付宝扫码支付    微信扫码支付   
    验证码:   换一换

    加入VIP,交流精品资源
     
    账号:
    密码:
    验证码:   换一换
      忘记密码?
        
    友情提示
    2、PDF文件下载后,可能会被浏览器默认打开,此种情况可以点击浏览器菜单,保存网页到桌面,就可以正常下载了。
    3、本站不支持迅雷下载,请使用电脑自带的IE浏览器,或者360浏览器、谷歌浏览器下载即可。
    4、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰。
    5、试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。

    Beam propagation in anizotropic crystals.ppt

    1、Beam propagation in anizotropic crystals,Optic axis of a crystal is the direction in which a ray of transmitted light suffers no birefringence (double refraction). Light propagates along that axis with a speed independent of its polarization,However, if the light beam is not parallel to the optical

    2、axis, then, when passing through the crystal the beam is split into two rays: the ordinary and extraordinary, to be mutually perpendicular polarized.,A crystal which has only one optic axis is called uniaxial crystal. An uniaxial crystal is isotropic within the plane orthogonal to the optical axis o

    3、f the crystal. A crystal which has only two optic axis is called biaxial crystal.,The refractive index of the ordinary ray is constant for any direction in the crystal, and of the extraordinary ray is variable and depends on the direction. In a uniaxial crystal for the direction parallel to the opti

    4、cal axis the refractive indices are equal.,Positive birefringence,Negative birefringence,BBO is negative uniaxial crystal,Fast Axis Direction having a low refractive index is the fast axis; at right angles to it is the slow axis, with a high index of refraction.,Type I cut,kp =ks +ki,npwp=2nswscosqs

    5、,Index of refraction of BBO (negative uniaxial crystal): blue solid curve: ordinary polarization; red/dash-dot curve: full extraordinary polarization; green/dash curve: extraordinary polarization at the phase matching angle (29o),for ws = wp/2,np=nscosqs,For collinear down-conversion the index of re

    6、fraction at wavelengths differing by a factor of two must be equal. For isotropic material it is impossible, but by using birefringent material we can achieve this condition via the different indices of refraction of orthogonal linear polarizations.,Calculating Characteristics of Noncollinear Phase

    7、Matching in Uniaxial and Biaxial Crystals N. Boeuf, D. Branning, I. Chaperot, E. Dauler, S. Gurin, G. Jaeger, A. Muller, A. Migdall Originally published in: Opt. Eng. 39(4), 1016-1024 (April 2000).,http:/units.nist.gov/Divisions/Div844/facilities/cprad/index.html,Polarization of light,Malus law, whi

    8、ch is named after Etienne-Louis Malus(1775 1812) , says that when a perfect polarizer is placed in a polarized beam of light, the intensity, I, of the light that passes through is given bywhere I0 is the initial intensity, and i is the angle between the lights initial polarization direction and the

    9、axis of the polarizer.,His discovery of the polarisation of light by reflection was published in 1809 and his theory of double refraction of light in crystals, in 1810.,RetardersA retarder, or waveplate, is an optical device that resolves a light wave into two orthogonal linear polarization componen

    10、ts and produces a phase shift between them. The resulting light wave generally is of a different polarization form. Ideally, retarders do not polarize, nor do they induce an intensity change in the light beam. They simply change its polarization form. Retarders are used in applications where control

    11、 or analysis of polarization states is required.,Half wave plate A retarder that produces a /2 phase shift is known as a half wave retarder. Half wave retarders can rotate the polarization of linearly polarized light to twice the angle between the retarder fast axis and the plane of polarization. Pl

    12、acing the fast axis of a half wave retarder at 45 to the polarization plane results in a polarization rotation of 90. Passing circularly polarized light through a half wave plate changes the “handedness“ of the polarization.,Quarter waveplate,If the orthogonal electric field components are equivalen

    13、t, a phase shift /4 in one component will result in circularly polarized light. Retarders that cause this shift are known as quarter wave retarders. They have the unique property of turning elliptically polarized light into linearly polarized light or of transforming linearly polarized light into circularly polarized light when the fast axis of the quarter wave plate at 45 to the incoming polarization plane. (Light polarized along the direction with the smaller index travels faster and thus this axis is termed the fast axis. The other axis is the slow axis).,


    注意事项

    本文(Beam propagation in anizotropic crystals.ppt)为本站会员(Iclinic170)主动上传,麦多课文档分享仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文档分享(点击联系客服),我们立即给予删除!




    关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服 - 联系我们

    copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
    备案/许可证编号:苏ICP备17064731号-1 

    收起
    展开