公开(公告)号：US09998235B2

公开(公告)日：2018-06-12

申请号：US14991826

申请日：2016-01-08

Applicant: Google Inc.

Inventor： Xiang Zhou ,  Ryohei Urata ,  Erji Mao ,  Hong Liu ,  Christopher Lyle Johnson

IPC: H04B10/00 ,  H04B10/69

CPC classification number: H04B10/6971 ,  H04B10/697

Abstract: This disclosure provides systems, methods, and apparatus for mitigating the effects of interference signals on optical signals received at a direct-detection optical receivers. The optical receivers are capable of attenuating interference noise signals resulting from the interference between a transmitted optical signal transmitted from a transmitter to the optical receiver and one or more additional signals received at the optical receiver. The interference can be due to multi-path interference or due to in-band interference. The receivers include a tunable filter for filtering the received optical signal to remove the interference. A frequency offset module processes the received optical signal to determine a frequency offset indicative of the difference between the carrier frequencies of a modulated optical signal and an interference optical signal. The offset frequency and a bandwidth determined by the frequency offset module can be used to adjust the tunable filter to remove the interference signal from the received signal.

公开(公告)号：US09391698B1

公开(公告)日：2016-07-12

申请号：US14061503

申请日：2013-10-23

Applicant: Google Inc.

Inventor： Ryohei Urata ,  Nathan Folkner ,  Zuowei Shen

IPC: H04B10/08 ,  H04B10/00 ,  H04B10/077 ,  H04B10/035 ,  H04B10/073

CPC classification number: H04B10/0779 ,  H04B10/035 ,  H04B10/073 ,  H04B10/0799 ,  H04B10/40 ,  H04B2210/08

Abstract: Systems and methods for achieving eye safety of an optical transceiver are provided. An optical module can be configured to output a first optical signal. A first photodetector can be configured to output a signal indicative of a presence or absence of a second optical signal. A controller can be coupled to the optical module and the first photodetector and can be configured to control the output of the optical module. In response to a determination that an output of the first photodetector indicates the second optical signal is absent, the controller can control the optical module to output the first signal at a decreased average optical power. In response to a determination that an output of the first photodetector indicates the second optical signal is present, the controller can control the optical module to output the first signal at an increased average optical power.

Abstract translation: 提供了用于实现光收发器的眼睛安全的系统和方法。 光学模块可以被配置为输出第一光信号。 第一光电检测器可以被配置为输出指示第二光信号的存在或不存在的信号。 控制器可以耦合到光学模块和第一光电检测器，并且可以被配置为控制光学模块的输出。 响应于确定第一光电检测器的输出指示第二光信号不存在，控制器可以控制光模块以平均光功率降低输出第一信号。 响应于第一光电检测器的输出表示第二光信号的确定，控制器可以控制光模块以增加的平均光功率输出第一信号。

公开(公告)号：US20150222969A1

公开(公告)日：2015-08-06

申请号：US14169734

申请日：2014-01-31

Applicant: Google Inc.

Inventor： Ryohei Urata ,  Hong Liu ,  Amin Vahdat ,  Christopher Lyle Johnson ,  Junlan Zhou ,  Alexander Shraer

IPC: H04Q11/00

CPC classification number: H04Q11/0005 ,  G06F13/4022 ,  H04Q11/0062 ,  H04Q2011/0015 ,  H04Q2011/0052 ,  Y02D10/14 ,  Y02D10/151

Abstract: Systems and methods for increasing bandwidth in a computer network are provided. A computer network can include a first lower level switch having a first port and a second port. The computer network can include a second lower level switch having a first port and a second port. The computer network can include an upper level switch having respective ports directly coupled to ports of the first and second lower level switches. A third port of the upper level switch can couple to a first port of a passive optical splitter. The passive optical splitter can have second and third ports coupled to respective ports of the first and second lower level switches. The passive optical splitter can be configured to transmit signals received at its first port as output signals on both of its second and third ports.

Abstract translation: 提供了一种用于增加计算机网络带宽的系统和方法。 计算机网络可以包括具有第一端口和第二端口的第一下级开关。 计算机网络可以包括具有第一端口和第二端口的第二下层开关。 计算机网络可以包括具有直接耦合到第一和第二下级交换机的端口的相应端口的上级交换机。 上级开关的第三端口可以耦合到无源分光器的第一端口。 无源光分路器可以具有耦合到第一和第二下层开关的相应端口的第二和第三端口。 无源光分路器可以被配置为将在其第一端口处接收的信号作为其第二和第三端口两端的输出信号进行发送。

公开(公告)号：US08965203B1

公开(公告)日：2015-02-24

申请号：US13631325

申请日：2012-09-28

Applicant: Google Inc.

Inventor： Amin Vahdat ,  Hong Liu ,  Ryohei Urata ,  Xiaoxue Zhao ,  Chris L. Johnson

IPC: H04J14/00

CPC classification number: H04J14/0282

Abstract: The disclosure describes implementations of an apparatus including a plurality of racks, wherein each rack houses a plurality of networking devices and each networking device includes a communication port. An optical circuit switch can be coupled to each of the plurality of communication ports in one or more of the plurality of racks, and a plurality of top-of-rack (TOR) switches can be coupled to the optical circuit switch. Other implementations are disclosed and claimed.

Abstract translation: 本公开描述了包括多个机架的设备的实现，其中每个机架容纳多个网络设备，并且每个网络设备包括通信端口。 光电路开关可以耦合到多个机架中的一个或多个中的多个通信端口中的每一个，并且多个顶架（TOR）开关可以耦合到光电路开关。 公开并要求保护其他实施方式。

公开(公告)号：US10025047B1

公开(公告)日：2018-07-17

申请号：US15488237

申请日：2017-04-14

Applicant: Google Inc.

Inventor： Hong Liu ,  Ryohei Urata ,  Woon Seong Kwon ,  Teckgyu Kang

IPC: G02B6/42 ,  H05K3/30 ,  H01L23/00 ,  H01L25/16 ,  H05K1/11 ,  H05K1/18 ,  H05K3/32

Abstract: Signal integrity in high-speed applications is dependent on both the underlying device performance and electronic packaging methods. The maturity of chip-on-board (COB) packaging technology using wire bonding makes it a cost beneficial option for the mass production of high-speed optical transceivers. However, wire bonding introduces parasitic inductance associated with the length of the bond wires that limits the scalability of the system for higher data throughput. A high-speed optical transceiver package according to a first proposed configuration minimizes packaging related parasitic inductance by vertically integrating components using flip-chip bonding. A high-speed optical transceiver package according to a second proposed configuration minimizes packaging related parasitic inductance with horizontal tiling of components using a chip carrier and flip-chip bonding.

公开(公告)号：US09692521B1

公开(公告)日：2017-06-27

申请号：US14793433

申请日：2015-07-07

Applicant: Google Inc.

Inventor： Xiang Zhou ,  Ryohei Urata ,  Christopher Lyle Johnson

IPC: H04J14/06 ,  H04B10/58 ,  H04B10/2507 ,  H04B10/556

CPC classification number: H04B10/58 ,  H04B10/2507 ,  H04B10/2572 ,  H04B10/532 ,  H04B10/556 ,  H04J14/06

Abstract: This disclosure provides systems, methods, and apparatus for mitigating the effects of an optical link in a communication system on polarization angles of signals transmitted over the optical link. The communication system can include an optical transmitter transmitting polarization-division multiplexed (PDM) optical signals over the optical link and a direct-detection receiver for receiving the PDM optical signals. The transmitter can include a polarization compensation unit for receiving estimated values of link polarization parameters from the receiver. The receiver uses the estimated values to pre-distort modulator drive and bias signals and to adjust the relative phase between modulated optical signals. The transmitter can also transmit training optical signals to the receiver over the optical link. The receiver uses the training optical signals to estimate the values of link polarization parameters. The receiver also can include a crosstalk mitigation unit for mitigating effects of crosstalk between the PDM optical signals.

公开(公告)号：US20170153391A1

公开(公告)日：2017-06-01

申请号：US15354655

申请日：2016-11-17

Applicant: Google Inc.

Inventor： Lieven Verslegers ,  Ryohei Urata ,  Hong Liu

IPC: G02B6/124 ,  G02B6/126 ,  G02B6/30

CPC classification number: G02B6/124 ,  G02B6/12 ,  G02B6/126 ,  G02B6/30 ,  G02B6/34 ,  G02B6/4246 ,  G02B2006/12102 ,  G02B2006/12121 ,  G02B2006/12142 ,  G02B2006/12147 ,  G02B2006/12164 ,  H04B10/2504 ,  H04B10/40

Abstract: This disclosure provides systems, methods, and apparatus for a photonic chip. The photonic chip includes one or more electronic components in addition to one or more optical components. Grating couplers can be utilized for coupling light incident from an optical fibers or lasers with the optical components on the photonic chip. The grating couplers can be designed to have a wide bandwidth to support applications such as wave division multiplexing (WDM). The wide bandwidth can be achieved by reducing a mode field diameter (MFD) of the light beams incident on the grating couplers, and selecting a beam size of the optical couplers to be substantially equal to MFD. The bandwidth can be further improved by using thin silicon layer for fabricating the ridges of the grating coupler. Grating couplers with relatively large beam sizes can be utilized for coupling light output by lasers with the optical components on the chip.

公开(公告)号：US09379819B1

公开(公告)日：2016-06-28

申请号：US14147134

申请日：2014-01-03

Applicant: Google Inc.

Inventor： Erji Mao ,  Hong Liu ,  Ryohei Urata ,  Melanie Beauchemin

IPC: H04B10/00 ,  H04B10/50 ,  H04B10/40

CPC classification number: H04B10/501 ,  G02B6/4246 ,  G02B6/4273 ,  H01L2224/48091 ,  H01L2224/48137 ,  H01L2224/49109 ,  H04B10/40 ,  H01L2924/00014

Abstract: Systems and methods for reducing temperature of an optical signal source co-packaged with a driver are provided. An optical transmitter can include a housing. The optical transmitter can include an optical signal source positioned within the housing. The optical transmitter can include a signal source driver positioned within the housing and configured to control an output of the optical signal source. The optical transmitter can include a substrate mounted on an interior surface of the housing and having a microwave waveguide coupled to it. The microwave waveguide can be configured to direct electrical signals originating outside the housing to the signal source driver. The substrate is can also be configured to limit heat transfer from the signal source driver to the optical signal source.

Abstract translation: 提供了用于降低与驱动器共同打包的光信号源的温度的系统和方法。 光发射机可以包括壳体。 光发射机可以包括位于壳体内的光信号源。 光发射机可以包括定位在壳体内并被配置为控制光信号源的输出的信号源驱动器。 光学发射器可以包括安装在壳体的内表面上并具有耦合到其上的微波波导的衬底。 微波波导可以被配置为将从壳体外部产生的电信号引导到信号源驱动器。 衬底也可以被配置为限制从信号源驱动器到光信号源的热传递。

公开(公告)号：US09247326B2

公开(公告)日：2016-01-26

申请号：US14169734

申请日：2014-01-31

Applicant: Google Inc.

Inventor： Ryohei Urata ,  Hong Liu ,  Amin Vahdat ,  Christopher Lyle Johnson ,  Junlan Zhou ,  Alexander Shraer

IPC: H04Q11/00 ,  G06F13/40

CPC classification number: H04Q11/0005 ,  G06F13/4022 ,  H04Q11/0062 ,  H04Q2011/0015 ,  H04Q2011/0052 ,  Y02D10/14 ,  Y02D10/151

Abstract: Systems and methods for increasing bandwidth in a computer network are provided. A computer network can include a first lower level switch having a first port and a second port. The computer network can include a second lower level switch having a first port and a second port. The computer network can include an upper level switch having respective ports directly coupled to ports of the first and second lower level switches. A third port of the upper level switch can couple to a first port of a passive optical splitter. The passive optical splitter can have second and third ports coupled to respective ports of the first and second lower level switches. The passive optical splitter can be configured to transmit signals received at its first port as output signals on both of its second and third ports.

Abstract translation: 提供了一种用于增加计算机网络带宽的系统和方法。 计算机网络可以包括具有第一端口和第二端口的第一下级开关。 计算机网络可以包括具有第一端口和第二端口的第二下层开关。 计算机网络可以包括具有直接耦合到第一和第二下级交换机的端口的相应端口的上级交换机。 上级开关的第三端口可以耦合到无源分光器的第一端口。 无源光分路器可以具有耦合到第一和第二下层开关的相应端口的第二和第三端口。 无源光分路器可以被配置为将在其第一端口处接收的信号作为其第二和第三端口两端的输出信号进行发送。

公开(公告)号：US09918377B1

公开(公告)日：2018-03-13

申请号：US15478663

申请日：2017-04-04

Applicant: Google Inc.

Inventor： Zuowei Shen ,  Kyle Fukuchi ,  Melanie Beauchemin ,  Ryohei Urata

IPC: H05K1/02 ,  H05K3/40 ,  G02B6/32 ,  G02B6/42 ,  H01S5/026 ,  H05K3/06 ,  H05K1/18 ,  H04B10/80 ,  H04B10/40 ,  H05K3/32

CPC classification number: H05K1/0206 ,  B23K26/381 ,  G02B6/00 ,  G02B6/32 ,  G02B6/42 ,  G02B6/4204 ,  G02B6/4246 ,  G02B6/4269 ,  G02B6/428 ,  H01S5/0261 ,  H04B10/40 ,  H04B10/801 ,  H05K1/0274 ,  H05K1/18 ,  H05K3/061 ,  H05K3/32 ,  H05K3/4038 ,  H05K2201/10121 ,  H05K2201/10416

Abstract: The present disclosure discusses an improved optical transceiver. The optical transceiver of the present disclosure includes an optical transmitter and an optical receiver coupled to an area of a printed circuit board that includes a plurality of thermal microvias. The thermal microvias are coupled to a heat sink or other heat dissipater and provide a path from the components of the optical transceiver to the heat dissipater for heat to travel.