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    • 3. 发明申请
    • OPTICAL ADD DROP MULTIPLEXER DEVICE WITH AN ELECTRICALLY SWITCHABLE BRAGG GRATING
    • 具有电动切换布拉格光栅的光学添加多路复用器件
    • WO2005047963A1
    • 2005-05-26
    • PCT/IB2004/001945
    • 2004-05-11
    • HOYA CORPORATIONGUNTHER, John, Edward
    • GUNTHER, John, Edward
    • G02F1/01
    • G02F1/1326G02B6/12007G02F1/3132G02F2201/307G02F2203/585
    • An optical add-drop mutiplexer device with low polarization dependent loss and polarization mode dispersion for use in optical communications systems comprises: a through optical waveguide, a' coupling circuit element and an add/drop circuit element comprising at least one of an input waveguide and an output waveguide. The coupling lightwave circuit element is optically coupled to the add/drop circuit element and the through optical waveguide by means of electrically variable gratings. Typically, the optical signal is a multi-channel WDM signal. Preferably, the variable grating is an electrically switchable Bragg grating. Each grating is overlaid by an electrode arrangement applied to a cover glass. Each electrode arrangement has first and second portions spaced from one another in the direction of light propagation. The electrodes provide electric fields that are generally orthogonal to one another and transverse to the direction of light propagation, thereby minimizing the effects of PDL and PMD.
    • 一种用于光通信系统的具有低偏振相关损耗和偏振模色散的光分插复用器装置包括:通孔光波导,耦合电路元件和加/减电路元件,其包括输入波导和 输出波导。 耦合光波电路元件通过电可变光栅光耦合到分插电路元件和通孔光波导。 通常,光信号是多信道WDM信号。 优选地,可变光栅是电可开关布拉格光栅。 每个光栅由施加到盖玻璃的电极布置覆盖。 每个电极装置具有在光传播方向上彼此间隔开的第一和第二部分。 电极提供通常彼此正交并且横向于光传播方向的电场,从而最小化PDL和PMD的影响。
    • 4. 发明申请
    • 導波路型液晶可変光減衰器
    • 波形类型液晶可变光衰减器
    • WO2004013685A1
    • 2004-02-12
    • PCT/JP2003/008932
    • 2003-07-14
    • 日本板硝子株式会社河本 眞司岩瀬 世彦
    • 河本 眞司岩瀬 世彦
    • G02F1/13
    • G02F1/1326G02F2203/48
    • A waveguide type liquid crystal variable light attenuator (10) used in the optical communication field. It is possible to provide an array at a low cost, have a high reliability without any movable portion, and suppress the power consumption and polarization dependent loss (PDL) to a low value. The waveguide type liquid crystal variable light attenuator (10) includes an optical waveguide having a main core (1) for inputting and outputting light and a sub-core (4) filled with nematic liquid crystal and arranged in the vicinity of the main core (1). By changing the refraction factor of the sub-core (4), the light propagating in the main core (1) is attenuated.
    • 一种在光通信领域中使用的波导型液晶可变光衰减器(10)。 可以以低成本提供阵列,在没有任何可移动部分的情况下具有高可靠性,并且将功耗和偏振相关损耗(PDL)抑制到低值。 波导型液晶可变光衰减器(10)包括具有用于输入和输出光的主芯(1)和填充有向列型液晶的子芯(4)并布置在主芯附近的光波导( 1)。 通过改变子芯(4)的折射系数,在主芯(1)中传播的光被衰减。
    • 7. 发明申请
    • FOLDED LIQUID-CRYSTAL VARIABLE OPTICAL ATTENUATOR
    • 折叠液晶可变光学衰减器
    • WO0244800A3
    • 2003-02-13
    • PCT/US0151142
    • 2001-11-02
    • CAMBRIDGE RES & INSTRMNT INCHOYT CLIFFORD CMILLER PETER J
    • HOYT CLIFFORD CMILLER PETER J
    • G02F1/133G02F1/1333G02F1/1335
    • G02F1/1326G02F1/13318G02F2201/17G02F2203/06G02F2203/48
    • A variable optical attenuator including: a birefringent element positioned to separate an input optical signal into two spatially separated, orthogonally polarized beams; a liquid crystal (LC) modulator positioned to receive the orthogonally polarized beams and selectively alter their polarizations; a reflective element positioned to reflect the beams back through the LC modulator and the birefringent element, wherein the birefringent element recombines orthogonally polarized components of the reflected beams to produce an output optical signal; and a controller coupled to the LC modulator to selectively cause the LC modulator to alter the polarizations of the orthogonally polarized beams, wherein during operation the controller is responsive to a request to variably attenuate the intensity of the output optical signal relative to the intensity of the input optical signal to one of multiple non-zero attenuation settings.
    • 一种可变光衰减器,包括:双折射元件,定位成将输入光信号分离成两个空间分离的正交偏振光束; 定位为接收正交偏振光束并选择性地改变其偏振的液晶(LC)调制器; 反射元件,定位成将光束反射通过LC调制器和双折射元件,其中双折射元件将反射光束的正交极化分量重新组合以产生输出光信号; 以及控制器,其耦合到所述LC调制器以选择性地使所述LC调制器改变所述正交偏振光束的极化,其中在操作期间,所述控制器响应于相对于所述LC调制器的强度可变地衰减所述输出光信号的强度的请求 输入光信号到多个非零衰减设置之一。
    • 10. 发明申请
    • LIQUID CRYSTAL OPTICAL SWITCH WITH BURNT-IN CONTROL
    • 液晶光学开关具有盲目控制
    • WO0196938A3
    • 2002-05-23
    • PCT/FR0101874
    • 2001-06-15
    • FRANCE TELECOMVINOUZE BRUNOWOLFFER NICOLELEVER ROGERGRAVEY PHILIPPE
    • VINOUZE BRUNOWOLFFER NICOLELEVER ROGERGRAVEY PHILIPPE
    • G02B6/35G02F1/1333G02F1/29G02F1/31G02B6/42
    • G02F1/31G02F1/1326G02F1/292
    • The invention concerns a switch for optical beams comprising a series of optical input channels (110. , 150) and a series of optical output channels (410, , 450), two liquid crystal cells, respectively adapted to deflect an optical beam coming out of an input channel (110, , 150) or arriving onto an output channel (410, , 450), said two cells comprising each a series of electrodes adapted to orient liquid crystals when one such electrode is subjected to a supply voltage, said electrodes being distributed in zones (210, , 250, 310, , 350), each zone corresponding to a single input channel (110, , 150) or a single output channel (410, , 450), the switch further comprising means for supplying the electrodes with selected voltages. The invention is characterised in that it comprises a series of separate electronic circuits, each being connected to at least a different zone (210, 250) of a given cell, said circuits being each capable of transforming a respective control signal indicating a channel to be coupled to the channel of said zone (210, , 250, 310, , 350) into a series of supply voltages for the electrodes of the zone (210, , 250, 310, , 350).
    • 本发明涉及一种用于光束的开关,其包括一系列光输入通道(110.,150)和一系列光输出通道(410,450),两个液晶单元分别适于偏转出来的光束 输入通道(110,150)或到达输出通道(410,450),所述两个单元包括一系列电极,其适于在一个这样的电极经受电源电压时定向液晶,所述电极为 分布在区域(210,22,310,350)中,每个区域对应于单个输入通道(110,150)或单个输出通道(410,450),所述开关还包括用于提供电极 选择电压。 本发明的特征在于它包括一系列单独的电子电路,每个电子电路连接到给定单元的至少不同区域(210,250),所述电路各自能够将指示频道的相应控制信号变换为 耦合到所述区域(210,...,250,310,350)的通道,以形成用于区域(210,,250,310,350)的电极的一系列电源电压。