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    • 14. 发明授权
    • Reflection type variable optical attenuator
    • 反射型可变光衰减器
    • US08854716B2
    • 2014-10-07
    • US13811043
    • 2011-06-27
    • Hiroaki OnoHidenori NakadaHirotaka KawaiYuko OtaTaro Nakamura
    • Hiroaki OnoHidenori NakadaHirotaka KawaiYuko OtaTaro Nakamura
    • G02F1/09G02B27/28
    • G02F1/09G02B27/28G02F2203/02G02F2203/48
    • An input/output port, a birefringent element, variable polarization rotator, and a reflector are arranged along an optical axis in the order named. The variable polarization rotator includes permanent magnets for applying a fixed magnetic field to a Faraday rotator in an in-plane direction to magnetically saturate the Faraday rotator and a solenoid coil for applying a variable magnetic field to the Faraday rotator in a direction of the optical axis. A fixed magnetic field is applied in the direction, in which the Faraday rotator is likely to be magnetically saturated. The Faraday rotator can be saturated with a low magnetic field of about 100 Oe. The permanent magnets may employ ferrite permanent magnets, which have weak magnetic forces. A variable magnetic field may also be reduced. Therefore, an air-core coil can be used.
    • 输入/输出端口,双折射元件,可变偏振旋转器和反射器按照所述顺序沿光轴布置。 可变偏振旋转器包括用于在面内方向上向法拉第旋转器施加固定磁场的永磁体,以使法拉第旋转器磁饱和;以及螺线管线圈,用于向法拉第旋转器沿光轴方向施加可变磁场 。 在<211>方向施加固定磁场,其中法拉第转子可能是磁饱和的。 法拉第转子可以用约100 Oe的低磁场饱和。 永磁体可以使用具有弱磁力的铁氧体永磁体。 也可以减小可变磁场。 因此,可以使用空心线圈。
    • 18. 发明授权
    • Large aperture polymer electro-optic shutter device and method of manufacturing same
    • 大孔聚合物电光快门装置及其制造方法
    • US08159738B2
    • 2012-04-17
    • US12816417
    • 2010-06-16
    • Robert C. HoffmanTimothy Pritchett
    • Robert C. HoffmanTimothy Pritchett
    • G02F1/03
    • G02F1/0338G02F1/061G02F2203/48Y10S359/90
    • A large-aperture direct-view high-speed electro-optic shutter includes an electro-optic polymer material constructed to form a Pockels cell and an integrated photoconducting semiconductor switch. A chromophore-doped polymer material or chromophore copolymer, wherein the chromophore is oriented within the polymer material, exhibits a linear electro-optic effect when an electric field is applied to the device. In one embodiment, the polymer host material comprises one or more of a polycarbonate, amorphous polycarbonate, or polymethylmethacrylate polymer hosts. The optically active chromophore comprising one or more coumarin and coumarin derivatives, stilbene or tolane derivatives is incorporated within the polymer host, forming a guest-host polymer. In another embodiment, the chromophore is chemically bonded to the monomer that forms the polymer, resulting in an optically active copolymer. The electro-optic shutter device is then activated by incident light through the photoconducting semiconductor switch, rendering the Pockels cell to have an optical density of at least 3.0.
    • 大孔径直视高速电光快门包括构成为形成普克尔斯(Pockels)单元和集成光导半导体开关的电光聚合物材料。 发色团掺杂的聚合物材料或发色团共聚物,其中发色团定向在聚合物材料内,当电场施加到该装置时呈现线性电光效应。 在一个实施方案中,聚合物主体材料包含聚碳酸酯,无定形聚碳酸酯或聚甲基丙烯酸甲酯聚合物主体中的一种或多种。 包含一种或多种香豆素和香豆素衍生物的光学活性发色团,二苯乙烯或甲苯衍生物掺入聚合物主体内,形成客体 - 聚合物。 在另一个实施方案中,发色团与形成聚合物的单体化学键合,得到光学活性共聚物。 然后通过入射光通过光电半导体开关激活电光快门装置,使得普克尔斯细胞具有至少3.0的光密度。
    • 19. 发明申请
    • VARIABLE OPTICAL ATTENUATOR (VOA)
    • 可变光学衰减器(VOA)
    • US20120081625A1
    • 2012-04-05
    • US13250180
    • 2011-09-30
    • Seong Woo SUH
    • Seong Woo SUH
    • G02F1/133G02B6/00
    • G02B6/266G02B6/3594G02F1/1326G02F2203/48
    • A variable optical attenuator includes a collimating unit that collimates an incident light beam, a polarization splitting member that separates the collimated light beam into a first polarized light beam having a first polarization and a second polarized light beam having a second polarization, a birefringence control unit through which the first and second polarized light beams pass, the birefringence control unit including a liquid crystal cell having a birefringence is controlled by a voltage or current, wherein the birefringence of the liquid crystal cell is substantially zero when no voltage or current is applied thereto, and a reflection member that reflects the first and second polarized light beams output from the birefringence control unit. The variable optical attenuator has high stability, high precision, and low volume.
    • 可变光衰减器包括准直入射光束的准直单元,将准直光束分离为具有第一偏振的第一偏振光束和具有第二偏振的第二偏振光束的偏振分束构件,双折射控制单元 通过第一和第二偏振光束通过的双折射控制单元,包括具有双折射性的液晶单元的双折射控制单元由电压或电流控制,其中当不施加电压或电流时液晶单元的双折射基本上为零 以及反射从双折射控制单元输出的第一和第二偏振光的反射构件。 可变光衰减器稳定性高,精度高,体积小。
    • 20. 发明授权
    • Optical receiver for use with range of signal strengths
    • 用于信号强度范围的光接收机
    • US07599596B1
    • 2009-10-06
    • US12077068
    • 2008-03-13
    • Dazeng FengMehdi AsghariDaniel C. Lee
    • Dazeng FengMehdi AsghariDaniel C. Lee
    • G02B6/10H04B10/00
    • G02B6/122G02B6/30G02B6/4204G02B2006/12097G02F1/0121G02F1/025G02F2201/58G02F2203/48
    • A receiver includes a waveguide defined in a layer of silicon positioned on a base. The waveguide is immobilized relative to the base along the length of the waveguide. The waveguide is unbranched and is a multi-mode waveguide. The receiver also includes a groove configured to receive an optical fiber. The groove is positioned such that when the optical fiber is positioned in the groove the waveguide receives a light signal that exits a facet of the optical fiber. The receiver also includes a light sensor configured to receive the light signal from the waveguide after the light signal is received by the waveguide, is guided through the waveguide, and exits the waveguide. The receiver also includes a tunable optical attenuator configured to attenuate the light signal as the light signal travels along the waveguide. The receiver can be formed on a chip such that the waveguide is the only optical waveguide on the chip.
    • 接收器包括限定在位于基底上的硅层中的波导。 波导相对于基底沿波导的长度被固定。 波导是未分支的,并且是多模波导。 接收器还包括配置成接收光纤的凹槽。 凹槽被定位成使得当光纤定位在凹槽中时,波导接收离开光纤小面的光信号。 接收机还包括光传感器,其被配置为在光信号被波导接收之后从波导接收光信号,被引导通过波导并离开波导。 接收机还包括可调光衰减器,配置成当光信号沿着波导传播时衰减光信号。 接收器可以形成在芯片上,使得波导是芯片上唯一的光波导。