公开(公告)号：US09705599B2

公开(公告)日：2017-07-11

申请号：US14813756

申请日：2015-07-30

Applicant: Google Inc.

Inventor： Vinayak Dangui ,  Bikash Koley ,  Vijay Vusirikala ,  Ralph Theodore Hofmeister

IPC: H04B10/00 ,  H04B10/40 ,  H04B10/43 ,  H04B10/63 ,  H04J14/02

CPC classification number: H04B10/40 ,  H04B10/43 ,  H04B10/63 ,  H04J14/02 ,  H04J14/0279

Abstract: This disclosure provides systems, methods, and apparatus for improving spectral efficiency of a communication system. The communication system can include a transmitter, a receiver and a communication link for communicating data between the transmitter and the receiver. The transmitter can employ a multi-carrier technique to transmit data to the receiver. The transmitter can generate a plurality of carrier signals using a receiver-side comb generator, one of which is sent to the transmitter as a pilot carrier signal combined with modulated carrier signals over an optical link. At the receiver the receiver-side comb generator uses the pilot carrier signal to generate a plurality of receiver-side carrier signals, which are used for detecting the modulated carrier signals. As the phase noise in the modulated carrier signals and the phase noise in the receiver-side carrier signals have the same characteristics, the phase noise is cancelled at the receiver, resulting in improved detection.

公开(公告)号：US20150200742A1

公开(公告)日：2015-07-16

申请号：US14312981

申请日：2014-06-24

Applicant: Google Inc.

Inventor： Valey Kamalov ,  Vijay Vusirikala ,  Bikash Koley ,  Vinayak Dangui

IPC: H04J14/02

CPC classification number: H04J14/0201 ,  H04J14/0202 ,  H04J14/0204 ,  H04J14/0206 ,  H04J14/021 ,  H04J14/0212 ,  H04J14/0213

Abstract: An optical add-drop multiplexer including a first filter filtering a first band of wavelengths of a communication spectrum for a first communication segment and a second filter filtering a second band of wavelengths of the communication spectrum for a second communication segment. The second band of wavelengths overlaps the first band of wavelengths in an overlap band of wavelengths. The overlap band may have a variable size. The first band of wavelengths includes a first fraction of the overlap band of wavelengths for the first communication segment and the second band of wavelengths includes a remaining fraction the overlap band of wavelengths for the second communication segment.

Abstract translation: 一种光分插复用器，包括滤波第一通信段的通信频谱的第一波长段的第一滤波器和滤波第二通信段的通信频谱的第二波长波段的第二滤波器。 第二波长波段在波长的重叠带中与第一波长波段重叠。 重叠带可以具有可变大小。 第一波长带包括用于第一通信段的波长的重叠带的第一分数，并且第二波长带包括用于第二通信段的波长的重叠带的剩余部分。

公开(公告)号：US09306664B1

公开(公告)日：2016-04-05

申请号：US14137079

申请日：2013-12-20

Applicant: Google Inc.

Inventor： Vijay Vusirikala ,  Xiaoxue Zhao ,  Bikash Koley

IPC: H04B10/079

CPC classification number: H04B10/07953

Abstract: Methods, mediums and systems described herein determine real-time in-service OSNR measurement without disrupting or turning off one or more channels of the network. An OSNR monitor described herein may be integrated with existing optical line systems. The OSNR measurements performed by the OSNR monitors are independent of the modulation format and thus, may work with all phase formats, amplitude format or a combination thereof. The real-time in-service OSNR data may be used to perform global network optimization to determine the optimal routing and data rate in the optical network. The OSNR data may be used to establish protection and restoration paths for network resiliency and to maximize data throughput.

Abstract translation: 本文描述的方法，介质和系统确定实时在线OSNR测量，而不中断或关闭网络的一个或多个信道。 本文描述的OSNR监视器可以与现有的光线路系统集成。 由OSNR监视器执行的OSNR测量与调制格式无关，因此可以使用所有相位格式，幅度格式或其组合。 实时在线OSNR数据可用于执行全局网络优化，以确定光网络中的最佳路由和数据速率。 OSNR数据可用于建立网络弹性的保护和恢复路径，并最大限度地提高数据吞吐量。

公开(公告)号：US20170033870A1

公开(公告)日：2017-02-02

申请号：US14813756

申请日：2015-07-30

Applicant: Google Inc.

Inventor： Vinayak Dangui ,  Bikash Koley ,  Vijay Vusirikala ,  Ralph Theodore Hofmeister

IPC: H04B10/40

CPC classification number: H04B10/40 ,  H04B10/43 ,  H04B10/63 ,  H04J14/02 ,  H04J14/0279

Abstract: This disclosure provides systems, methods, and apparatus for improving spectral efficiency of a communication system. The communication system can include a transmitter, a receiver and a communication link for communicating data between the transmitter and the receiver. The transmitter can employ a multi-carrier technique to transmit data to the receiver. The transmitter can generate a plurality of carrier signals using a receiver-side comb generator, one of which is sent to the transmitter as a pilot carrier signal combined with modulated carrier signals over an optical link. At the receiver the receiver-side comb generator uses the pilot carrier signal to generate a plurality of receiver-side carrier signals, which are used for detecting the modulated carrier signals. As the phase noise in the modulated carrier signals and the phase noise in the receiver-side carrier signals have the same characteristics, the phase noise is cancelled at the receiver, resulting in improved detection.

Abstract translation: 本公开提供了用于提高通信系统的频谱效率的系统，方法和装置。 通信系统可以包括用于在发射机和接收机之间传送数据的发射机，接收机和通信链路。 发射机可以采用多载波技术将数据发射到接收机。 发射机可以使用接收机侧梳状发生器产生多个载波信号，其中一个被发送到发射机，作为通过光链路与已调制的载波信号组合的导频载波信号。 在接收机处，接收机侧梳发生器使用导频载波信号来产生多个接收机侧载波信号，用于检测已调载波信号。 由于调制载波信号中的相位噪声和接收机侧载波信号中的相位噪声具有相同的特性，所以在接收机处消除相位噪声，从而改善了检测。

公开(公告)号：US09191141B2

公开(公告)日：2015-11-17

申请号：US14312981

申请日：2014-06-24

Applicant: Google Inc.

Inventor： Valey Kamalov ,  Vijay Vusirikala ,  Bikash Koley ,  Vinayak Dangui

IPC: H04J14/02

CPC classification number: H04J14/0201 ,  H04J14/0202 ,  H04J14/0204 ,  H04J14/0206 ,  H04J14/021 ,  H04J14/0212 ,  H04J14/0213

Abstract: An optical add-drop multiplexer including a first filter filtering a first band of wavelengths of a communication spectrum for a first communication segment and a second filter filtering a second band of wavelengths of the communication spectrum for a second communication segment. The second band of wavelengths overlaps the first band of wavelengths in an overlap band of wavelengths. The overlap band may have a variable size. The first band of wavelengths includes a first fraction of the overlap band of wavelengths for the first communication segment and the second band of wavelengths includes a remaining fraction the overlap band of wavelengths for the second communication segment.

Abstract translation: 一种光分插复用器，包括滤波第一通信段的通信频谱的第一波长段的第一滤波器和滤波第二通信段的通信频谱的第二波长波段的第二滤波器。 第二波长波段在波长的重叠带中与第一波长波段重叠。 重叠带可以具有可变大小。 第一波长带包括用于第一通信段的波长的重叠带的第一分数，并且第二波长带包括用于第二通信段的波长的重叠带的剩余部分。

公开(公告)号：US09167322B1

公开(公告)日：2015-10-20

申请号：US14301555

申请日：2014-06-11

Applicant: Google Inc.

Inventor： Xiaoxue Zhao ,  Bikash Koley ,  Vijay Vusirikala ,  Edward Crabbe ,  Paul Phillip Germano ,  Hong Liu ,  Philip Michael Wells

IPC: H04Q11/00 ,  H04B10/2575

CPC classification number: H04Q11/0005 ,  H04B10/2575 ,  H04Q2011/0013 ,  H04Q2011/0032 ,  H04Q2011/0039 ,  H04Q2011/006

Abstract: A packet switch/router including a first stage switch fabric receiving an electrical signal, a mid-stage buffer receiving and storing the electrical signal from the first stage switch fabric, and a second stage switch fabric receiving the electrical signal from the mid-stage buffer. Each switch fabric includes N layers of N×N arrayed waveguide gratings (AWGs), and each AWG has ingress ports and egress ports. A wavelength tunable device, such as a tunable laser, communicates with a source ingress port of an AWG and converts the received electrical signal to an optical signal having a wavelength selected for routing a packet from the source ingress port to a target egress port of the arrayed waveguide grating. A photoreceiver, such as a burst-mode photoreceiver, receives the propagated optical signal from the target egress port and converts the optical signal to the electrical signal.

Abstract translation: 包括接收电信号的第一级交换结构的分组交换机/路由器，接收并存储来自第一级交换结构的电信号的中间缓冲器以及从中间级缓冲器接收电信号的第二级交换机结构 。 每个交换结构包括N层N×N阵列波导光栅（AWG），每个AWG具有入口端口和出口端口。 诸如可调激光器的波长可调设备与AWG的源入口端口进行通信，并将接收到的电信号转换为具有选择的波长的光信号，以将数据包从源入口端口路由到目标出口端口 阵列波导光栅。 诸如突发模式光接收器的光接收器从目标出口接收传播的光信号，并将光信号转换为电信号。