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    Wavelength selective optical couplers
    1.
    发明授权
    Wavelength selective optical couplers 失效
    波长选择光耦合器

    公开(公告)号：US06289699B1

    公开(公告)日：2001-09-18

    申请号：US09035919

    申请日：1998-03-06

    申请人： Anthony S. Kewitsch ,  George A. Rakuljic ,  Amnon Yariv

    发明人： Anthony S. Kewitsch ,  George A. Rakuljic ,  Amnon Yariv

    IPC分类号： C03B3715

    CPC分类号： G02B6/29334 ,  G02B6/02085 ,  G02B6/021 ,  G02B6/02109 ,  G02B6/02114 ,  G02B6/02133 ,  G02B6/02138 ,  G02B6/02152 ,  G02B6/022 ,  G02B6/02204 ,  G02B6/12007 ,  G02B6/2835 ,  G02B6/29383 ,  H04J14/0201 ,  H04J14/0206 ,  H04J14/0209 ,  H04J14/0213 ,  H04J14/0219

    摘要： A wavelength selective optical fiber coupler having various applications in the field of optical communications is disclosed. The coupler is composed of dissimilar waveguides in close proximity. A light induced, permanent index of refraction grating is recorded in the coupler waist The grating filters and transfers energy within a particular range of wavelengths from a first waveguide to a second waveguide. Transversely asymmetric gratings provide an efficient means of energy transfer. The coupler can be used to combine or multiplex a plurality of lasers operating at slightly different wavelengths into a single fiber. Other embodiments such as a dispersion compensator and gain flattening filter are disclosed.

    摘要翻译： 公开了一种在光通信领域具有各种应用的波长选择性光纤耦合器。 耦合器由相邻的不同波导组成。 光诱导的永久折射率光栅被记录在耦合器腰部中。光栅在从第一波导到第二波导的特定波长范围内过滤和传递能量。 横向不对称光栅提供了有效的能量传递手段。 耦合器可用于将以稍微不同的波长工作的多个激光器组合或多路复用到单个光纤中。 公开了诸如色散补偿器和增益平坦化滤光器的其它实施例。

    Self-trapping and self-focusing of optical beams in photopolymers
    2.
    发明授权
    Self-trapping and self-focusing of optical beams in photopolymers 有权
    光束在光聚合物中的自陷和自聚焦

    公开(公告)号：US06387593B1

    公开(公告)日：2002-05-14

    申请号：US09443035

    申请日：1999-11-18

    申请人： Anthony S. Kewitsch ,  Amnon Yariv

    发明人： Anthony S. Kewitsch ,  Amnon Yariv

    IPC分类号： G03C500

    CPC分类号： B82Y20/00 ,  G02B6/1221 ,  G02B6/1225 ,  G02B6/13 ,  G03F7/001 ,  G03F7/20 ,  Y10S430/146

    摘要： A polymer material is exposed to radiation of a type that changes some aspect of the polymer's radiation passing properties. The radiation that caused the property change is then contained by the material. The property change can be self-focusing or self-trapping light can be used. In that case, the same light that causes the photopolymerization is contained by the change in index of refraction that is caused by the polymerization.

    摘要翻译： 将聚合物材料暴露于改变聚合物辐射通过性能的一些方面的类型的辐射。 导致属性变化的辐射然后被材料所包含。 属性变化可以是自聚焦，也可以使用自拍光。 在这种情况下，引起光聚合的相同的光被聚合引起的折射率的变化所包含。

    Multiplexing and selective updatable fixing and erasing of volume holograms in photorefractive media and second harmonic generation in photorefractive media by optically induced periodic poling
    4.
    发明授权
    Multiplexing and selective updatable fixing and erasing of volume holograms in photorefractive media and second harmonic generation in photorefractive media by optically induced periodic poling 失效
    光折射介质中体积全息图的复用和选择性可更新固定和擦除，光折射介质中的二次谐波生成

    公开(公告)号：US5422873A

    公开(公告)日：1995-06-06

    申请号：US37076

    申请日：1993-03-25

    申请人： Anthony S. Kewitsch ,  Mordechai Segev ,  Amnon Yariv

    发明人： Anthony S. Kewitsch ,  Mordechai Segev ,  Amnon Yariv

    IPC分类号： G03H1/26 ,  G11C13/04 ,  G11B7/00

    CPC分类号： G11C13/042 ,  G03H1/2645 ,  G03H1/0248 ,  G03H2001/0268 ,  G03H2001/2615 ,  G03H2260/35

    摘要： New methods are presented for multiplexing volume holograms in electrooptic materials. Multiple volume holograms can be superimposed in a medium and be individually addressed by tuning the underlying refractive index of the medium or the crystal parameters, while keeping the external parameters (wavelength, angles) fixed. According to the presented methods, the refractive index and crystal parameters of the material can be varied via the electrooptic, elastooptic or piezoelectric effects, alone or in combination with each other, by tuning the value of an applied electric field, or by tuning an applied mechanical stress, or by changing the material temperature. Volume holograms that have been multiplexed by either wavelength or angle or electric field or mechanical stress or temperature can be individually addressed by any one of the same five parameters. Additionally, selective, updatable fixing and erasing of volume holograms in photorefractive media is described. Each holographic page may be fixed individually and overwritten without destroying the other fixed pages. Further, Second Harmonic Generation and Parametric Amplification by optically induced periodic poling in ferroelectric photorefractive materials is described.

    摘要翻译： 提出了新的电光学材料中多重体积全息图的方法。 多个体积全息图可以叠加在介质中，并通过调节介质的潜在折射率或晶体参数，同时保持外部参数（波长，角度）固定而单独寻址。 根据所提出的方法，材料的折射率和晶体参数可以通过电光，弹性或压电效应单独或彼此组合，通过调节所施加的电场的值，或通过调谐施加的 机械应力，或通过改变材料温度。 通过波长或角度或电场或机械应力或温度复用的体积全息图可以通过相同的五个参数中的任何一个来单独寻址。 另外，描述了在光折射介质中的体积全息图的选择性，可更新的固定和擦除。 每个全息页可以单独固定和重写，而不会破坏其他固定页。 此外，描述了在铁电光折变材料中的光诱导周期极化的第二谐波产生和参数放大。

    Self-trapping and self-focusing of optical beams in photopolymers
    5.
    发明授权
    Self-trapping and self-focusing of optical beams in photopolymers 失效
    光束在光聚合物中的自陷和自聚焦

    公开(公告)号：US06274288B1

    公开(公告)日：2001-08-14

    申请号：US08981181

    申请日：1998-07-16

    申请人： Anthony S. Kewitsch ,  Amnon Yariv

    发明人： Anthony S. Kewitsch ,  Amnon Yariv

    IPC分类号： G11B70045

    CPC分类号： B82Y20/00 ,  G02B6/1221 ,  G02B6/1225 ,  G02B6/13 ,  G03F7/001 ,  G03F7/20 ,  Y10S430/146

    摘要： A polymer material is exposed to radiation of a type that changes some aspect of the polymer's radiation passing properties. The radiation that caused the property change is then contained by the material. The property change can be self-focusing or self-trapping light can be used. In that case, the same light that causes the photopolymerization is contained by the change in index of refraction that is caused by the polymerization.

    摘要翻译： 将聚合物材料暴露于改变聚合物辐射通过性能的一些方面的类型的辐射。 导致属性变化的辐射然后被材料所包含。 属性变化可以是自聚焦，也可以使用自拍光。 在这种情况下，引起光聚合的相同的光被聚合引起的折射率的变化所包含。