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    • 6. 发明授权
    • Polarization transformer
    • 极化变压器
    • US06404537B1
    • 2002-06-11
    • US09519293
    • 2000-03-06
    • Paul MelmanYingyin ZouQiushui Chen
    • Paul MelmanYingyin ZouQiushui Chen
    • G05F133
    • G02F1/0555G02F1/0136
    • A polarization transformer includes at least one plate of transparent polycrystalline material which has an optical axis oriented perpendicular to a propagation direction of incident radiation having a first polarization state. The plate includes electrodes for applying an electric field across a plane of the plate perpendicular to the propagation direction so as to provide controlled phase change such that the polarization of radiation transmitted through the polarization transformer is transformed from the first polarization state to a second polarization state. The plate in a preferred embodiment comprises a ferroelectric complex oxide such as lead lanthanum zirconate titanate (PLZT) material. Such a material provides devices that have very fast response (on the order of microseconds) and low insertion loss.
    • 偏振变换器包括至少一个透明多晶材料板,其具有垂直于具有第一偏振状态的入射辐射的传播方向定向的光轴。 板包括用于垂直于传播方向在平板平面上施加电场的电极,以便提供受控的相位变化,使得透过偏振变换器的辐射的偏振从第一偏振状态转变为第二偏振状态 。 优选实施例中的板包括铁电复合氧化物,例如锆钛酸铅镧(PLZT)材料。 这种材料提供了具有非常快的响应(微秒数量级)和低插入损耗的器件。
    • 10. 发明授权
    • Optical fiber centering device
    • 光纤定心装置
    • US4391487A
    • 1983-07-05
    • US223192
    • 1981-01-07
    • Paul MelmanW. John Carlsen
    • Paul MelmanW. John Carlsen
    • G02B6/36G02B6/32G02B5/14
    • G02B6/322
    • A centering device, for holding an optical fiber along an axis, includes three sections of fiber receiving means, and a receiving member. The receiving member has a cylindrical recess, concentric with the axis, for holding the sections in assembly. The sections are substantially identical, each having a uniform cross-sectional configuration at right angles along a major portion of its length forming a boundary of fixed perimeter. One portion of the boundary of one section contacts another section. Another portion of the boundary contacts a different section. A third portion contiguous to the first two portions is adapted to engage an optical fiber along its length. A fourth portion contiguous to the first two, but not to the third, engages the cylindrical wall defined by the concentric recess of the receiving member. The recess terminates with a planar wall perpendicular to the axis. It can have an axially oriented depression. The fourth portion of the boundary engages differing amounts of a cylindrical wall depending upon the shape of the fourth portion. The sections include elastomeric material of sufficient resilience for a passageway defined by the third portions of assembled sections to expandably receive an optical fiber dimensioned larger than the passageway. The passageway can have a substantially triangular cross-section for receiving a fiber having a substantially circular cross-section. It can flare outwardly from a position interior the fiber receiving means to respective ends thereof. Passageway flaring can have a triangular, a hexagonal, or a circular configuration. The device can have a fiber receiving means with a polygonal shaped external surface. The receiving member can be transparent. The fiber receiving means can be held within the recess of the member by a force fit. The radius of the three sections, when assembled but prior to insertion into the recess, is greater than the radius of the recess.
    • 用于沿轴线保持光纤的定心装置包括三个光纤接收装置部分和一个接收部件。 接收构件具有与轴同心的圆柱形凹部,用于将部件保持在组装中。 这些部分基本上相同,每个部分具有沿其长度的大部分成直角的均匀横截面构造,形成固定周界的边界。 一部分边界的一部分接触另一部分。 边界的另一部分接触不同的部分。 与前两个部分邻接的第三部分适于沿其长度接合光纤。 与第一两个但不是第三个相邻的第四部分接合由接收构件的同心凹槽限定的圆柱形壁。 凹槽以垂直于轴线的平面壁终止。 它可以具有轴向定向的凹陷。 边界的第四部分根据第四部分的形状接合不同数量的圆柱形壁。 这些部分包括对于由组装部分的第三部分限定的通道具有足够弹性的弹性材料,以可扩展地接收尺寸大于通道的光纤。 通道可以具有基本上三角形的横截面,用于接收具有基本圆形横截面的纤维。 它可以从光纤接收装置内部的位置向外扩展到其相应的端部。 通道扩口可具有三角形,六边形或圆形配置。 该装置可以具有多边形外表面的光纤接收装置。 接收构件可以是透明的。 纤维接收装置可以通过力配合保持在构件的凹部内。 当组装好但在插入凹槽之前,三个部分的半径大于凹槽的半径。