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    • 3. 发明公开
    • WAVEGUIDE-TYPE POLARIZATION BEAM SPLITTER
    • 极地食品麻省理工学院
    • EP2669722A1
    • 2013-12-04
    • EP12739739.6
    • 2012-01-25
    • Nippon Telegraph And Telephone Corporation
    • SAIDA, TakashiNASU, YusukeMIZUNO, TakayukiKASAHARA, Ryoichi
    • G02B6/126
    • G02B6/126G02B6/2793G02B6/2813G02B2006/12116G02B2006/1215
    • Provided is a waveguide-type polarization beam splitter in which deterioration of a polarization extinction ratio due to temperature change and wavelength change is suppressed. The waveguide-type polarization beam splitter includes: an input optical waveguides (11); a first optical coupler (12) coupled to the input optical waveguides (11); a pair of optical waveguide arms (13a, 13b) coupled to outputs of the first optical coupler; and a second optical coupler (18) coupled to the pair of optical waveguide arms (13a, 13b). A groove (15) is formed to extend across the pair of optical waveguide arms (13a, 13b) and two quarter wave plates (16a, 16b) are provided in the groove (15) to extend respectively across the arms (13a, 13b). Polarization axes of the quarter wave plates (16a, 16b) are orthogonal to each other. The first optical coupler (12) which gives a phase difference of 0° or 180° between coupled or split light beams and the second optical coupler (18) which gives a phase difference of 90° or -90° between coupled or split light beams are used in combination.
    • 提供了抑制由于温度变化和波长变化引起的偏振消光比的劣化的波导型偏振分束器。 波导型偏振分束器包括:输入光波导(11); 耦合到所述输入光波导(11)的第一光耦合器(12); 耦合到所述第一光耦合器的输出的一对光波导臂(13a,13b); 以及耦合到所述一对光波导臂(13a,13b)的第二光耦合器(18)。 形成一个沟槽(15),跨越一对光波导臂(13a,13b)延伸,并且两个四分之一波片(16a,16b)设置在槽(15)中,分别延伸穿过臂(13a,13b) 。 四分之一波片(16a,16b)的极化轴彼此正交。 第一光耦合器(12)在耦合或分离光束之间给出0°或180°的相位差,并且在耦合或分束光束之间给出90°或-90°的相位差的第二光耦合器(18) 被组合使用。
    • 9. 发明公开
    • DIFFRACTIVE FOURIER OPTICS FOR OPTICAL COMMUNICATIONS
    • BEUGENDE FOURIER-OPTIKFÜRDIE OPTISCHE KOMMUNIKATION
    • EP1413078A4
    • 2005-11-09
    • EP02747944
    • 2002-07-03
    • ARROYO OPTICS INC
    • RAKULJIC GEORGE AKEWITSCH ANTHONY SLEYVA VICTOR
    • G02B6/32G02B6/34G02B6/35H04J14/02H04Q11/00
    • G02B6/2931G02B6/2713G02B6/2793G02B6/29311G02B6/29313G02B6/29391G02B6/29395G02B6/29398G02B6/32H04J14/02H04J14/0221
    • Systems and methods for modifying, switching, rearranging or otherwise controlling the individual wavelength components of DWDM optical signals are described, which employ compact refolding and reshaping of these dimensionally patterned beams within a confined volume. The wavelength components of the beam are diffractively dispersed (3) with high diffraction efficiency, and then reversely converged to beam waists (4) incident on different ones of an array of control elements such as liquid crystal cells, MEMs and other spatial light modulators, or fixed distributed patterns. With reflective control elements the wavelength components may be reversely refolded along reciprocal paths with rediffraction, to form a reconstituted and revised DWDM output signal. If the control elements transmit at least one of the wavelength components, a separate, adjacent three dimensional beam refolding path, with rediffraction, is used to feed recombined signals to a separate output.
    • 描述了用于修改,切换,重新布置或以其它方式控制DWDM光信号的各个波长分量的系统和方法,其在限制体积内采用紧凑的重折叠和这些尺寸图案化的束的重新成形。 光束的波长分量以高的衍射效率衍射(3),然后反向会聚到入射到诸如液晶单元,MEM和其它空间光调制器的控制元件阵列上的不同阵列上的波束(4) 或固定的分布式模式。 利用反射控制元件,波长分量可以沿着具有红移的相反路径反向重折叠,以形成重构和修改的DWDM输出信号。 如果控制元件发射至少一个波长分量,则使用具有红移的单独的相邻的三维光束重折叠路径将重新组合的信号馈送到单独的输出。