公开(公告)号：US20170201330A1

公开(公告)日：2017-07-13

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: H04B10/69

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：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：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：US09231704B1

公开(公告)日：2016-01-05

申请号：US14275166

申请日：2014-05-12

Applicant: Google Inc.

Inventor： Xiang Zhou ,  Erji Mao

IPC: H04B10/54 ,  H04B10/50 ,  H04B10/524

CPC classification number: H04B10/504 ,  H04B10/58

Abstract: In some implementations, the output of a directly modulated laser (DML) includes nonlinearities with respect to the input signal driving the DML. When the DML is transmitting an amplitude modulated signal, the nonlinearities can induce noise into the signal, which makes it difficult for a receiving node to correctly decode the received signal. The system and methods described herein pre-correct the error caused by the nonlinearities of the DML by filtering (or pre-correcting) the data signal that drives the DML.

Abstract translation: 在一些实现中，直接调制激光器（DML）的输出包括相对于驱动DML的输入信号的非线性。 当DML发送幅度调制信号时，非线性可以将噪声引入到信号中，这使得接收节点难以对接收到的信号进行正确的解码。 本文描述的系统和方法通过过滤（或预校正）驱动DML的数据信号来校正由DML的非线性引起的误差。