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    Wavelength division multiplexed passive optical network
    41.
    发明授权
    Wavelength division multiplexed passive optical network 有权
    波分复用无源光网络

    公开(公告)号：US08582975B2

    公开(公告)日：2013-11-12

    申请号：US12987449

    申请日：2011-01-10

    申请人： Radhakrishnan L. Nagarajan ,  Christopher C. Liou ,  Masaki Kato

    发明人： Radhakrishnan L. Nagarajan ,  Christopher C. Liou ,  Masaki Kato

    IPC分类号： H04B10/00

    CPC分类号： H04J14/0282 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0265 ,  H04J14/0298 ,  H04J2014/0253

    摘要： Consistent with the present disclosure, an optical communication system, such as a passive optical network (PON), is provided that includes an optical line terminal (OLT) and a plurality of optical network units (ONUs). The OLT includes a plurality of photonic integrated circuits that have both optical transmitters and receivers provided therein. Accordingly, the OLT may have fewer components and a simpler, more reliable and cost-effective design than a conventional OLT including discrete components. In addition, various ONU configurations are provided that also have a simple design and fewer components. Thus, ONUs consistent with the present disclosure may also have reduced costs.

    摘要翻译： 根据本公开，提供了诸如无源光网络（PON）的光通信系统，其包括光线路终端（OLT）和多个光网络单元（ONU）。 OLT包括多个光子集成电路，其具有设置在其中的光发送器和接收器。 因此，OLT可以具有比包括分立组件的常规OLT更少的组件和更简单，更可靠和更具成本效益的设计。 另外，提供了也具有简单设计和较少组件的各种ONU配置。 因此，与本公开一致的ONU也可以降低成本。

    Polarization beam splitter
    42.
    发明授权
    Polarization beam splitter 有权
    极化分束器

    公开(公告)号：US08260136B2

    公开(公告)日：2012-09-04

    申请号：US12572208

    申请日：2009-10-01

    申请人： Radhakrishnan L. Nagarajan ,  Masaki Kato

    发明人： Radhakrishnan L. Nagarajan ,  Masaki Kato

    IPC分类号： H04J4/00 ,  H04J14/06 ,  H04B10/06

    CPC分类号： G02B6/12004 ,  G02B6/12009 ,  G02B6/264 ,  G02B2006/12126 ,  H04J14/02 ,  H04J14/06

    摘要： Consistent with the present disclosure, a polarization multiplexed optical signal having optical signals with both TE and TM polarizations is supplied to an input of a polarization beam splitter (PBS). The PBS includes a first output that supplies TE polarized optical signals and a second output supplies TM polarized optical signals. A first polarizer is coupled to the second output of the PBS to pass the TM polarized optical signals, while rejecting light having other polarizations, such as the TE polarization. A rotator then rotates the light output from the first polarizer, so that such light has a TE polarization. A second polarizer is coupled to the rotator to filter light having a polarization other than the TE polarization. In addition, a third polarizer is coupled to the first output of the PBS in order to filter or block any TM light, for example, that may be output from the PBS with the TE polarized signal. Accordingly, the optical signals in the polarization multiplexed optical signal are effectively filtered, and some are rotated so that each has the same, e.g., TE polarization. Moreover, each optical signal is substantially free from light having extraneous polarizations and may be supplied to an optical hybrid circuit. Data carried by such optical signals may thus be reliably recovered.

    摘要翻译： 根据本公开，具有TE和TM偏振两者的光信号的偏振复用光信号被提供给偏振分束器（PBS）的输入端。 PBS包括提供TE偏振光信号的第一输出，第二输出提供TM偏振光信号。 第一偏振器耦合到PBS的第二输出以通过TM偏振光信号，同时抑制具有其它极化的光，例如TE偏振。 旋转器然后旋转从第一偏振器输出的光，使得这种光具有TE偏振。 第二偏振器耦合到旋转器以对具有除了TE极化之外的极化的光进行滤波。 此外，第三偏振器耦合到PBS的第一输出，以便滤波或阻挡例如可以用TE偏振信号从PBS输出的TM光。 因此，偏振复用光信号中的光信号被有效地滤波，并且有些被旋转，使得每个具有相同的例如TE偏振。 此外，每个光信号基本上没有具有外来极化的光，并且可以被提供给光混合电路。 因此可以可靠地恢复由这种光信号携带的数据。

    High capacity transmitter implemented on a photonic integrated circuit
    43.
    发明授权
    High capacity transmitter implemented on a photonic integrated circuit 有权
    在光子集成电路上实现的高容量发射器

    公开(公告)号：US08238759B2

    公开(公告)日：2012-08-07

    申请号：US12345315

    申请日：2008-12-29

    申请人： Charles H. Joyner ,  Radhakrishnan L. Nagarajan ,  Masaki Kato ,  Peter W. Evans ,  Fred A. Kish, Jr.

    发明人： Charles H. Joyner ,  Radhakrishnan L. Nagarajan ,  Masaki Kato ,  Peter W. Evans ,  Fred A. Kish, Jr.

    IPC分类号： H04B10/04

    CPC分类号： H04B10/532 ,  H01S5/0085 ,  H01S5/0265 ,  H01S5/12 ,  H01S5/4012 ,  H04B10/505 ,  H04B10/5561

    摘要： A high capacity optical transmitter implemented on a photonic integrated circuit chip comprises a single light source which supplies a continuous wave having a particular wavelength to a plurality of modulators to form modulated optical information signals. A phase shifter is coupled to at least one of the modulators and is used to shift the phase of the corresponding modulated optical information signal associated with a particular modulator. A polarization beam combiner receives each of the modulated optical information signals from the modulators and the modulated optical information signal from the phase shifter and combines each of these signals to form a polarization multiplexed differential quadrature phase-shift keying signal. The light source, the plurality of modulators, the phase shifter and the polarization beam combiner are all integrated on the chip.

    摘要翻译： 在光子集成电路芯片上实现的高容量光发射器包括单个光源，其向多个调制器提供具有特定波长的连续波以形成调制的光信息信号。 移相器耦合到至少一个调制器，并且用于移位与特定调制器相关联的相应调制光信息信号的相位。 偏振光束组合器从调制器接收来自调制器的调制光信息信号和来自移相器的调制光信息信号，并组合这些信号中的每一个以形成偏振复用差分正交相移键控信号。 光源，多个调制器，移相器和偏振光束组合器都集成在芯片上。

    Optical integrated circuit
    44.
    发明授权
    Optical integrated circuit 有权
    光集成电路

    公开(公告)号：US08160405B2

    公开(公告)日：2012-04-17

    申请号：US12646340

    申请日：2009-12-23

    申请人： Radhakrishnan L. Nagarajan ,  Masaki Kato ,  Vikrant Lal

    发明人： Radhakrishnan L. Nagarajan ,  Masaki Kato ,  Vikrant Lal

    IPC分类号： G02B6/00 ,  G02B6/10

    CPC分类号： G02B6/126 ,  G02B6/27 ,  G02B6/2706 ,  G02B6/2766

    摘要： Consistent with the present disclosure, a non-adiabatic polarization rotator is provided that can rotate the polarization of an incoming over a relatively short length. Light is supplied to the polarization rotator via a polarizer, which insures that the optical input to the polarization polarization rotator has a desired polarization. Preferably, the polarization rotator has a structure that is readily implemented with semiconductor materials and can be fabricated with known processing techniques. In addition, the polarization rotator and polarizer may include similar materials and/or layers, such that both may be readily integrated on a common substrate, such as an indium phosphide (InP) substrate.

    摘要翻译： 根据本公开，提供了一种非绝热的偏振旋转器，其可以使相对较短长度的进入的偏振旋转。 通过偏振器将光提供给偏振旋转器，这确保了偏振旋转器的光输入具有期望的偏振。 优选地，偏振旋转器具有易于用半导体材料实现的结构，并且可以用已知的处理技术制造。 此外，偏振旋转器和偏振器可以包括相似的材料和/或层，使得两者可以容易地集成在公共衬底上，例如磷化铟（InP）衬底。

    Optical receiver integrated on a substrate
    45.
    发明申请
    Optical receiver integrated on a substrate 有权
    集成在基板上的光接收器

    公开(公告)号：US20100322631A1

    公开(公告)日：2010-12-23

    申请号：US12816599

    申请日：2010-06-16

    申请人： Radhakrishnan L. Nagarajan ,  Masaki Kato ,  Jeffrey T. Rahn

    发明人： Radhakrishnan L. Nagarajan ,  Masaki Kato ,  Jeffrey T. Rahn

    IPC分类号： H04J14/06

    CPC分类号： G02B6/12004 ,  G02B6/12009 ,  G02B6/264 ,  G02B2006/12126 ,  H04J14/02 ,  H04J14/06

    摘要： A coherent optical receiver circuit is disclosed in which various components of the optical receiver may be provided or integrated, in one example, on a common substrate. Further integration is achieved by incorporating various optical demultiplexer designs that are relatively compact and conserve space on the surface of the substrate. The optical receiver circuit may be used to demultiplex quadrature phase shift keying (QPSK) optical signals.

    摘要翻译： 公开了一种相干光接收器电路，其中在一个示例中，可以在公共基板上提供或集成光接收器的各种部件。 通过结合相对紧凑的各种光解复用器设计并节省衬底表面上的空间来实现进一步的集成。 光接收机电路可用于解复用正交相移键控（QPSK）光信号。

    HIGH CAPACITY TRANSMITTER IMPLEMENTED ON A PHOTONIC INTEGRATED CIRCUIT
    46.
    发明申请
    HIGH CAPACITY TRANSMITTER IMPLEMENTED ON A PHOTONIC INTEGRATED CIRCUIT 有权
    在光电集成电路上实现的高容量发射器

    公开(公告)号：US20090245795A1

    公开(公告)日：2009-10-01

    申请号：US12345315

    申请日：2008-12-29

    申请人： Charles H. Joyner ,  Radhakrishnan L. Nagarajan ,  Masaki Kato ,  Peter W. Evans ,  Fred A. Kish, JR.

    发明人： Charles H. Joyner ,  Radhakrishnan L. Nagarajan ,  Masaki Kato ,  Peter W. Evans ,  Fred A. Kish, JR.

    IPC分类号： H04J14/02

    CPC分类号： H04B10/532 ,  H01S5/0085 ,  H01S5/0265 ,  H01S5/12 ,  H01S5/4012 ,  H04B10/505 ,  H04B10/5561

    摘要： A high capacity optical transmitter implemented on a photonic integrated circuit chip comprises a single light source which supplies a continuous wave having a particular wavelength to a plurality of modulators to form modulated optical information signals. A phase shifter is coupled to at least one of the modulators and is used to shift the phase of the corresponding modulated optical information signal associated with a particular modulator. A polarization beam combiner receives each of the modulated optical information signals from the modulators and the modulated optical information signal from the phase shifter and combines each of these signals to form a polarization multiplexed differential quadrature phase-shift keying signal. The light source, the plurality of modulators, the phase shifter and the polarization beam combiner are all integrated on the chip.

    摘要翻译： 在光子集成电路芯片上实现的高容量光发射器包括单个光源，其向多个调制器提供具有特定波长的连续波以形成调制的光信息信号。 移相器耦合到至少一个调制器，并且用于移位与特定调制器相关联的相应调制光信息信号的相位。 偏振光束组合器从调制器接收来自调制器的调制光信息信号和来自移相器的调制光信息信号，并组合这些信号中的每一个以形成偏振复用差分正交相移键控信号。 光源，多个调制器，移相器和偏振光束组合器都集成在芯片上。

    Transmitter photonic integrated circuit
    47.
    发明授权
    Transmitter photonic integrated circuit 有权
    发射机光子集成电路

    公开(公告)号：US08280255B2

    公开(公告)日：2012-10-02

    申请号：US12646942

    申请日：2009-12-23

    申请人： Charles H. Joyner ,  Radhakrishnan L. Nagarajan ,  Peter W. Evans

    发明人： Charles H. Joyner ,  Radhakrishnan L. Nagarajan ,  Peter W. Evans

    IPC分类号： H04J14/02

    CPC分类号： H04B10/506 ,  H04B10/564

    摘要： The present invention provides a system, apparatus and method to provide for amplification at various points along one or more optical paths of a photonic integrated circuit. According to various embodiments of the invention, the photonic integrated circuit includes a plurality of optical devices having associated characteristics which may have lead to optical signal degradation. One or more optical amplifiers provided along one or more optical paths of the photonic integrated circuit compensate for such signal degradation, resulting in a highly configurable photonic integrated circuit. The various optical devices of the photonic integrated circuit may be provided on a single substrate.

    摘要翻译： 本发明提供一种用于在沿着光子集成电路的一个或多个光路的各个点处进行放大的系统，装置和方法。 根据本发明的各种实施例，光子集成电路包括具有可能导致光信号劣化的相关特性的多个光学器件。 沿着光子集成电路的一个或多个光路提供的一个或多个光放大器补偿这种信号劣化，导致高度可配置的光子集成电路。 光子集成电路的各种光学器件可以设置在单个衬底上。