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29 条记录 (耗时 0.028 秒)

    High speed thermo-optic phase shifter and devices comprising same
    4.
    发明授权
    High speed thermo-optic phase shifter and devices comprising same 有权
    高速热电相移器及包括其的装置

    公开(公告)号：US06925232B2

    公开(公告)日：2005-08-02

    申请号：US10448711

    申请日：2003-05-30

    申请人： Edward John Laskowski ,  Christi Kay Madsen ,  Annjoe Golangco Wong-Foy

    发明人： Edward John Laskowski ,  Christi Kay Madsen ,  Annjoe Golangco Wong-Foy

    IPC分类号： G02B6/138 ,  G02F1/01 ,  G02F1/025 ,  G02B6/26 ,  G02B6/10

    CPC分类号： G02F1/011 ,  G02B6/138 ,  G02F1/0147 ,  G02F1/025 ,  G02F2001/0113

    摘要： In accordance with the invention, a high speed thermo-optic phase shifter comprises a length of optical waveguide including a waveguiding core of a first material having an index of refraction n1 and a first order temperature dependence |dn1/dT| and, optically coupled to the core, a length of a second material having an index n2 preferably greater than the core (n2>n1) and a first order temperature dependence |dn2/dT| than the core (|dn2/dT|>|dn1/dT|). Advantageously, the length of second material is adiabatically tapered at both ends. Upon heating, as by a resistance heater, the second material changes the optical pathlength by an amount predominantly determined by |dn2/dT| providing faster switching speed. In a preferred embodiment, the core comprises silica, and the second material comprises silicon to produce switching speeds up to a few hundred MHz.

    摘要翻译： 根据本发明，高速热光移相器包括一段光波导，其包括具有折射率n 1的第一材料的波导芯和一阶温度依赖性| dn 1 / dT | 并且光学地耦合到所述芯，具有优选地大于所述芯的指数n 2的第二材料的长度（n <2） >）和一阶温度依赖性| dn <2 / dT | （| dn 2 / dT |> | dn <1> / dT |）。 有利地，第二材料的长度在两端是绝热的锥形。 在加热时，如电阻加热器那样，第二材料将光程长度改变主要由| dn2 / dT | 提供更快的切换速度。 在优选实施例中，芯包括二氧化硅，第二材料包括硅以产生高达几百MHz的切换速度。

    Optical communication system including broadband all-pass filter for dispersion compensation
    5.
    发明授权
    Optical communication system including broadband all-pass filter for dispersion compensation 有权
    光通信系统包括用于色散补偿的宽带全通滤波器

    公开(公告)号：US06259847B1

    公开(公告)日：2001-07-10

    申请号：US09287430

    申请日：1999-04-07

    申请人： Gadi Lenz ,  Christi Kay Madsen ,  Joseph Shmulovich

    发明人： Gadi Lenz ,  Christi Kay Madsen ,  Joseph Shmulovich

    IPC分类号： G02B624

    CPC分类号： G02B6/29334 ,  G02B6/12002 ,  G02B6/12004 ,  G02B6/12007 ,  G02B6/29338 ,  G02B6/29394 ,  G02B2006/12107 ,  G02B2006/12109

    摘要： In accordance with the invention, an optical all-pass filter comprises a substrate-supported multilayer waveguiding structure comprising a first layer including a waveguiding optical ring resonator, a second layer including an optical grating optically coupled to the ring resonator, and a third layer including a relatively straight waveguide optically coupled to the grating. The waveguide can be made with standard index material matched to an optical communication system, and the ring can be made of higher index material. The grating sandwiched between them provides phase matching between these two index mismatched structures, facilitating efficient power transfer between them.

    摘要翻译： 根据本发明，光学全通滤波器包括基板支撑的多层波导结构，其包括包括波导光环谐振器的第一层，包括光耦合到环形谐振器的光栅的第二层，以及包括 光学耦合到光栅的相对直的波导。 波导可以用与光通信系统匹配的标准索引材料制成，并且环可以由较高折射率材料制成。 夹在它们之间的光栅提供了这两个指数不匹配结构之间的相位匹配，有助于它们之间的有效的功率传递。

    Variable optical delay line with a large continuous tuning range
    6.
    发明授权
    Variable optical delay line with a large continuous tuning range 有权
    可变光延迟线具有较大的连续调谐范围

    公开(公告)号：US07212695B2

    公开(公告)日：2007-05-01

    申请号：US10634403

    申请日：2003-08-05

    申请人： Albin Lloyd Kasper ,  Jane D. LeGrange ,  Christi Kay Madsen

    发明人： Albin Lloyd Kasper ,  Jane D. LeGrange ,  Christi Kay Madsen

    IPC分类号： G02B6/00 ,  H04B10/00

    CPC分类号： G02B6/2861 ,  G02B6/3512 ,  G02B6/3558

    摘要： In accordance with the invention, a variable optical delay line with a large continuous tuning range comprises an incremental variable delay line to provide delay selected from a sequence of incrementally differing delays and a continuous variable delay line to provide a continuously variable delay over a range encompassing a delay increment in the first variable delay line. In a preferred embodiment, the first variable delay line comprises an array of delay paths where each path is curved differently from the others to provide an incrementally different delay. The second variable delay line is a tunable delay path continuously tunable over the delay increment of the first.

    摘要翻译： 根据本发明，具有大的连续调谐范围的可变光学延迟线包括增量可变延迟线，以提供从递增不同延迟的序列中选择的延迟和连续可变延迟线，以在包围的范围内提供连续可变的延迟 在第一可变延迟线中的延迟增量。 在优选实施例中，第一可变延迟线包括延迟路径的阵列，其中每个路径与其他路径不同地弯曲以提供递增不同的延迟。 第二可变延迟线是在第一可变延迟线的延迟增量上连续可调的可调延迟路径。

    Apparatus and method for measurement and adaptive control of polarization mode dispersion in optical fiber transmission systems
    7.
    发明授权
    Apparatus and method for measurement and adaptive control of polarization mode dispersion in optical fiber transmission systems 有权
    光纤传输系统中偏振模色散的测量和自适应控制的装置和方法

    公开(公告)号：US06807321B2

    公开(公告)日：2004-10-19

    申请号：US10180842

    申请日：2002-08-19

    申请人： Christi Kay Madsen

    发明人： Christi Kay Madsen

    IPC分类号： G02B600

    CPC分类号： G02B6/278 ,  G02B6/29343 ,  H04B10/2569

    摘要： In accordance with the invention, an optical fiber transmission system is provided with a new method and apparatus to measure PMD and then to use the measurements to control adaptive optical filters that minimize system signal degradation. The measurements provide accurate information to compensate for distortions and thereby permit higher transmission rates. The new technique can obtain phase information without optical heterodyning and without bandlimiting. In a first embodiment, an optical signal transmitter, such as a laser/modulator pair, is driven by a data signal combined with a test signal, in the form of a comb of tones with known relative magnitude and phase relationships. Tunable all pass filters recover phase and magnitude information to control an adaptive filter for precise compensation. In a second embodiment, no changes are made to the transmitted signal. The relative delay between orthogonal polarizations of a modulated signal can be obtained by using a polarization beam splitter (PBS), flipping (rotating by 90°) the polarization of one output, sweeping a narrowband optical filter (NBF) across the signal spectrum and detecting the interference between polarizations. Additional detectors can obtain the magnitude versus frequency for the orthogonal components, x and y.

    摘要翻译： 根据本发明，光纤传输系统被提供有测量PMD的新方法和装置，然后使用测量来控制使系统信号劣化最小化的自适应光学滤波器。 这些测量提供了准确的信息来补偿失真，从而允许更高的传输速率。 新技术可以获得没有光学外差和无限幅的相位信息。 在第一实施例中，诸如激光/调制器对的光信号发射器以与已知相对幅度和相位关系的音调梳形式的与测试信号组合的数据信号驱动。 可调谐全通滤波器恢复相位和幅度信息，以控制自适应滤波器进行精确补偿。 在第二实施例中，不对发送的信号进行任何改变。 调制信号的正交极化之间的相对延迟可以通过使用偏振分束器（PBS），翻转（旋转90°）一个输出的偏振，扫过信号频谱上的窄带滤光器（NBF）并检测 极化之间的干扰。 附加的检测器可以获得正交分量x和y的幅度对频率。

    Tunable etched grating for WDM optical communication systems
    8.
    发明授权
    Tunable etched grating for WDM optical communication systems 有权
    WDM光通信系统可调蚀刻光栅

    公开(公告)号：US06522795B1

    公开(公告)日：2003-02-18

    申请号：US09573988

    申请日：2000-05-17

    申请人： Rebecca Jordan ,  Christi Kay Madsen

    发明人： Rebecca Jordan ,  Christi Kay Madsen

    IPC分类号： G02B634

    CPC分类号： G02F1/0115 ,  G02F1/0147 ,  G02F1/065 ,  G02F2201/307

    摘要： In accordance with the present invention, a waveguide grating comprises a core and a first cladding material adjacent the core. The first cladding is configured, as by etching, to provide a periodic grating, and a second cladding material having a controllable refractive index overlies the first cladding material. If the index of the second cladding is different from that of the first cladding, the configuration of the first cladding provides an optical grating. If, however, the controllable index of the second cladding is adjusted to equal that of the first cladding, the grating becomes essentially transparent. This grating is particularly useful as a reconfigurable add/drop filter in a WDM optical communication system. It is also useful in grating-assisted couplers and variable optical delay lines.

    摘要翻译： 根据本发明，波导光栅包括与芯相邻的芯和第一包层材料。 如通过蚀刻，第一包层被配置成提供周期性光栅，并且具有可控折射率的第二覆层材料覆盖在第一覆层材料上。 如果第二包层的折射率不同于第一包层的折射率，则第一包层的构造提供光栅。 然而，如果将第二包层的可控索引调整为与第一包层的可控折射率相等，则光栅基本上是透明的。 该光栅在WDM光通信系统中作为可重配置的分插滤波器特别有用。 它也可用于光栅辅助耦合器和可变光延迟线。

    Tunable all-pass optical filters with large free spectral ranges
    9.
    发明授权
    Tunable all-pass optical filters with large free spectral ranges 有权
    可调式全通滤光片，具有大的自由光谱范围

    公开(公告)号：US06389203B1

    公开(公告)日：2002-05-14

    申请号：US09573086

    申请日：2000-05-17

    申请人： Rebecca Jordan ,  Christi Kay Madsen

    发明人： Rebecca Jordan ,  Christi Kay Madsen

    IPC分类号： G02B612

    CPC分类号： G02F1/3136 ,  G02B6/12002 ,  G02F1/0147 ,  G02F1/065 ,  G02F2203/15

    摘要： In accordance with the invention, a tunable optical all-pass filter with a substrate-supported multilayer waveguiding structure. A first layer including a waveguiding optical ring resonator, a second layer for spacing, and a third layer including a curved waveguide. The curved waveguide is optically coupled to the resonator by two spaced apart optical couplers extending through the spacing layer, and tunability is provided by a first phase-shifter to control the optical pathlength of the resonator and a second phase-shifter operative on the waveguide to control the strength of coupling between the waveguide and the resonator. In one embodiment, the waveguide and the resonator are horizontally spaced apart in the non-coupling regions to provide optical isolation. In another, the waveguide and resonator can overlap horizontally, but the spacer layer is thicker in the non-coupling regions to provide optical isolation.

    摘要翻译： 根据本发明，一种具有基板支撑的多层波导结构的可调光学全通滤波器。 包括波导光环谐振器，第二间隔层和包括弯曲波导的第三层的第一层。 弯曲波导通过延伸穿过间隔层的两个间隔开的光耦合器光学耦合到谐振器，并且可调谐性由第一移相器提供以控制谐振器的光路长度，以及在波导上操作的第二移相器 控制波导与谐振器之间的耦合强度。 在一个实施例中，波导和谐振器在非耦合区域中水平间隔开以提供光隔离。 在另一个中，波导和谐振器可以水平重叠，但是在非耦合区域中间隔层较厚，以提供光学隔离。

    Integrated polarization beam splitter with quarter-wave plate for polarimeter and PMD compensation applications
    10.
    发明授权
    Integrated polarization beam splitter with quarter-wave plate for polarimeter and PMD compensation applications 有权
    具有四分之一波长板的集成偏振分束器，用于旋光仪和PMD补偿应用

    公开(公告)号：US07228037B2

    公开(公告)日：2007-06-05

    申请号：US10458440

    申请日：2003-06-10

    申请人： Christi Kay Madsen

    发明人： Christi Kay Madsen

    IPC分类号： G02B6/44

    CPC分类号： H04B10/2569 ,  G01J4/00

    摘要： An optical device for changing polarization comprises a waveguide having a waveguide end facet coupled to a quarter-wave plate/reflector combination to rotate the polarization of incident light to the waveguide by 90 degrees. In one embodiment, a polarization beam splitter/rotator combination (PBSR) uses a quarter-wave plate in reflection at the end facet of the waveguide. The polarization beam splitter/rotator combination and variations of that structure are applied in various useful topologies as polarization mode dispersion (PMD) compensators and polarimeters.

    摘要翻译： 用于改变偏振的光学装置包括具有耦合到四分之一波片/反射器组合的波导端面的波导，以将入射光的偏振旋转到波导90度。 在一个实施例中，偏振分束器/旋转器组合（PBSR）在波导的端面使用四分之一波片反射。 偏振分束器/旋转器组合和该结构的变化被应用在各种有用的拓扑中作为偏振模色散（PMD）补偿器和偏振计。