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    • 1. 发明授权
    • Method and system for maintaining and controlling the signal-to-noise
ratio of hologams recorded in ferroelectric photorefractive materials
    • 用于维持和控制记录在铁电光折变材料中的全息图的信噪比的方法和系统
    • US5684612A
    • 1997-11-04
    • US528748
    • 1995-09-15
    • Jeffrey P. WildeLambertus Hesselink
    • Jeffrey P. WildeLambertus Hesselink
    • G02F1/03G02F1/31G11B7/0065G11C7/00G11C13/04G03H1/02
    • G02F1/31G02F1/0338G11C13/042G11C7/005G03H1/182G03H1/265G03H2001/026G03H2001/0268G03H2001/2675G03H2240/53G03H2270/54G11B7/0065
    • A hologram with a dynamically controlled diffraction efficiency and enhanced signal-to-noise ratio is recorded in ferroelectric photorefractive materials, such as strontium barium niobate (Sr.sub.x Ba.sub.1-x Nb.sub.2 O.sub.6) (SBN), BSTN, SCNN, PBN, BSKNN, BaTiO.sub.3, LiNbO.sub.3, KNbO.sub.3, KTN, PLZT and the tungsten bronze family. The diffraction efficiency of the hologram is dynamically controlled by applying an electric field along the polar axis of the ferroelectric photorefractive recording medium. Electrically controlled diffraction is used in conjunction with hologram fixing and operation of the material at a temperature in the vicinity of or above its Curie temperature to additionally provide prolonged, low-noise readout. The general methods for recording and reconstructing a hologram (or a set of multiplexed holograms) using these techniques is disclosed. A plurality of configurations employing the improved hologram are disclosed, including an optical crossbar switch in guided-wave and free-space formats that can function as a component in a variety of parallel optical processing systems, a reconfigurable dynamic wavelength filter, and a page-based holographic data storage system.
    • 具有动态控制的衍射效率和增强的信噪比的全息图被记录在铁电光折变材料中,例如铌酸钡锶钡(SbxBa1-xNb2O6)(SBN),BSTN,SCNN,PBN,BSKNN,BaTiO3,LiNbO3,KNbO3 ,KTN,PLZT和钨青铜家族。 通过沿着铁电型光折射记录介质的极轴施加电场来动态地控制全息图的衍射效率。 电子衍射与全息图固定和材料的操作结合使用,其温度在其居里温度附近或更高的温度下,另外提供延长的低噪声读数。 公开了使用这些技术记录和重建全息图(或一组多路复用全息图)的一般方法。 公开了采用改进的全息图的多种配置,包括导波和自由空间格式的光学交叉开关,其可以用作各种并行光学处理系统中的组件,可重新配置的动态波长滤波器和页面 - 基于全息数据存储系统。
    • 3. 发明授权
    • Optical spectral power monitors employing polarization deversity scheme
    • 采用偏振方向的光谱功率监视器
    • US06804428B1
    • 2004-10-12
    • US10022303
    • 2001-12-14
    • Mark H. GarrettJeffrey P. WildePavel G. Polynkin
    • Mark H. GarrettJeffrey P. WildePavel G. Polynkin
    • G02B612
    • G01J3/447G01J3/0224G01J3/2803G01J2003/2866G02B6/2713G02B6/2793G02B6/2931G02B6/4215
    • This invention provides a method and apparatus for spectral power monitoring by use of a polarization diversity scheme. In the present invention, a multi-wavelength optical signal is first decomposed into first and second polarization components, and the second polarization component is subsequently rotated by 90-degrees, prior to impinging onto a diffraction grating that provides a higher diffraction efficiency for the first polarization component. The diffraction grating separates the first and second polarization components by wavelength respectively into first and second sets of optical beams, impinging onto an array of optical power sensors. The inventive optical spectral power monitoring apparatus thus is able to minimize the insertion loss, while providing enhanced spectral resolution. Further, by modulating the first and second sets of optical beams prior to impinging onto the optical power sensor array, the present invention enables an optical power spectrum associated with each polarization component in the multi-wavelength optical signal to be separately determined.
    • 本发明提供了一种通过使用偏振分集方案进行光谱功率监测的方法和装置。 在本发明中,首先将多波长光信号分解为第一和第二偏振分量,然后在撞击衍射光栅之前第二偏振分量随后旋转90度,该衍射光栅为第一和第二偏振分量提供较高的衍射效率 偏振分量。 衍射光栅将波长的第一和第二偏振分量分别分离成第一和第二组光束,入射到光功率传感器阵列上。 因此,本发明的光谱功率监测装置能够最小化插入损耗,同时提供增强的光谱分辨率。 此外,通过在入射到光功率传感器阵列之前调制第一和第二组光束,本发明使得能够分开地确定与多波长光信号中的每个偏振分量相关联的光功率谱。
    • 5. 发明授权
    • Method and apparatus for servo-based spectral array alignment in optical systems
    • 光学系统中基于伺服的光谱阵列对准的方法和装置
    • US06507685B1
    • 2003-01-14
    • US09961565
    • 2001-09-20
    • Pavel G. PolynkinJeffrey P. Wilde
    • Pavel G. PolynkinJeffrey P. Wilde
    • G02B626
    • G02B6/4215G01J3/0224G01J3/2803G01J3/447G01J2003/2866G02B6/2713G02B6/2793G02B6/2931G02B6/4213G02B6/4225G02B6/4227
    • This invention provides a novel method and apparatus which use a wavelength-dispersing means such as a diffraction grating to spatially separate a multi-wavelength optical signal along with a reference signal by wavelength into multiple spectral channels and a reference spectral component in a spectral array with a predetermined relative alignment. By aligning the reference spectral component at a predetermined location, the spectral channels simultaneously impinge onto designated locations, e.g., on an array of beam-receiving elements positioned in accordance with the spectral array. The reference spectral component may be further maintained at the predetermined location by way of servo-control, thereby ensuring that the spectral channels stay aligned at the designated locations. The present invention can be used to construct a new line of servo-based optical systems, including spectral power monitors and optical multiplexers/demultiplexers, for WDM optical networking applications.
    • 本发明提供了一种新颖的方法和装置,其使用诸如衍射光栅的波长分散装置将多波长光信号与参考信号一起通过波长空间分离成多个光谱通道和光谱阵列中的参考光谱分量, 预定的相对对准。 通过在预定位置对准参考光谱分量,光谱通道同时撞击到指定位置,例如在根据光谱阵列定位的波束接收元件的阵列上。 参考频谱分量可以通过伺服控制进一步保持在预定位置,从而确保频谱信道在指定位置保持对准。 本发明可用于构建用于WDM光网络应用的基于伺服的光学系统的新系列,包括光功率监视器和光复用器/解复用器。
    • 8. 发明授权
    • Free-space dynamic wavelength routing systems with interleaved channels for enhanced performance
    • 具有交错通道的自由空间动态波长路由系统,以提高性能
    • US07164859B2
    • 2007-01-16
    • US10229922
    • 2002-08-28
    • Karl Arnold BelserMasud MansuripurJeffrey P. Wilde
    • Karl Arnold BelserMasud MansuripurJeffrey P. Wilde
    • H04B14/02G02F6/32G02F6/34G02F6/35G02F26/08
    • G02B6/29386G02B6/266G02B6/2931G02B6/29313G02B6/34H04J14/0206H04J14/0208H04J14/021H04J14/0213
    • A novel wavelength routing apparatus is disclosed, which uses a diffraction grating to separate a multi-wavelength optical signal from an input port into multiple spectral channels; a channel-interleaving assembly (e.g., an array of prisms) to interleave the spectral channels into two channel groups; and an “augmented relay system” to relay the interleaved channel groups onto two separate arrays of channel micromirrors, respectively. The channel micromirrors are individually controllable and pivotable to reflect the spectral channels into multiple output ports. As such, the inventive wavelength routing apparatus is capable of routing the spectral channels on a channel-by-channel basis and coupling any spectral channel into any one of the output ports. Further, the channel-interleaving scheme thus devised effectively “enlarges” the channel spacing and thereby allows the channel micromirrors in each array to be made considerably larger and more reliable, thereby significantly improving the channel filtering characteristics and ensuring more robust performance.
    • 公开了一种新颖的波长路由设备,其使用衍射光栅将多波长光信号与输入端口分离成多个光谱通道; 信道交织组件(例如,棱镜阵列)将频谱信道交织成两个信道组; 以及“增强中继系统”,分别将交织的信道组中继到两个独立的信道微镜阵列上。 通道微镜可独立控制和可枢转,以将光谱通道反射到多个输出端口。 因此,本发明的波长路由设备能够在逐个信道的基础上路由频谱信道,并将任何频谱信道耦合到任何一个输出端口。 此外,由此设计的信道交织方案有效地“扩大”信道间隔,从而允许将每个阵列中的信道微镜做得相当大和更可靠,从而显着提高信道滤波特性并确保更强的性能。