公开(公告)号：US20180175935A1

公开(公告)日：2018-06-21

申请号：US15385696

申请日：2016-12-20

Applicant: Google Inc.

Inventor： Liang Du ,  Yut Loy Chan ,  Xiangjun Zhao ,  Changhong Joy Jiang ,  Cedric Fund Lam ,  Daoyi Wang ,  Tao Zhang

IPC: H04B10/25 ,  H04J14/02

CPC classification number: H04B10/2503 ,  H04J14/0227 ,  H04J14/025 ,  H04J14/0282 ,  H04J14/0287 ,  H04J14/0291

Abstract: A carrier office includes an optical line terminal, a first transmit-erbium-doped fiber amplifier (EDFA), and a second transmit-EDFA. The OLT is configured to transmit first and second optical signals. The first transmit-EDFA is optically coupled to the OLT and a first feeder fiber, and the first feeder fiber is optically coupled to a first remote node (RN). The first transmit-EDFA is operable between a respective enabled state and a respective disabled state. The second transmit-EDFA is optically coupled to the OLT and a second feeder fiber, and the second feeder fiber is optically coupled to a second RN. The second transmit-EDFA is operable between a respective enabled state and a respective disabled state.

公开(公告)号：US09749080B2

公开(公告)日：2017-08-29

申请号：US14938146

申请日：2015-11-11

Applicant: Google Inc.

Inventor： Cedric Fung Lam ,  Liang Du ,  Changhong Joy Jiang ,  Ben Warren Segura ,  Xiangjun Zhao ,  Daoyi Wang

IPC: H04J14/00 ,  H04J14/02 ,  H04B10/25 ,  H04J14/08

CPC classification number: H04J14/0247 ,  H04B10/2503 ,  H04J14/0221 ,  H04J14/0223 ,  H04J14/0242 ,  H04J14/0265 ,  H04J14/0282 ,  H04J14/08 ,  H04Q11/0067

Abstract: A communication system includes a first multiplexer configured to multiplex a first optical line terminal signal having a first multiplexing group and a second optical line terminal signal having a second multiplexing group into a first multiplexed signal. The communication system includes a second multiplexer configured to demultiplex a second multiplexed signal into a third optical line terminal signal having the first multiplexing group and a fourth optical line terminal signal having the second multiplexing group. Moreover, the communication system includes a third multiplexer optically connected with the first multiplexer and the second multiplexer, the third multiplexer configured to multiplex/demultiplex between a feeder optical signal and the first and second multiplexed signals. The first and second optical line terminal signals include a legacy upstream free spectral range, and the third and fourth optical line terminal signals include a legacy downstream free spectral range.

公开(公告)号：US20170150243A1

公开(公告)日：2017-05-25

申请号：US14952321

申请日：2015-11-25

Applicant: Google Inc.

Inventor： Liang Du ,  Xiangjun Zhao ,  Cedric Fung Lam ,  Daoyi Wang ,  Changhong Joy Jiang

IPC: H04Q11/00 ,  H04L29/06

CPC classification number: H04Q11/0067 ,  H04J14/0241 ,  H04L69/18 ,  H04Q11/0005 ,  H04Q2011/0016 ,  H04Q2011/0032 ,  H04Q2011/0079

Abstract: The communication system has first and second optical systems and an optical feed fiber in communication with the first optical system and arranged to convey a feeder optical signal to the second optical system. The first optical system includes a multiplexer configured to multiplex/demultiplex between a first optical line terminal signal, a second optical line terminal signal, and the feeder optical signal. The feeder optical signal includes the first optical line terminal signal and the second optical line terminal signal. The first optical line terminal signal includes a first upstream free spectral range and a first downstream free spectral range. The second optical line terminal signal includes a second upstream free spectral range and a second downstream free spectral range. The second optical system is in communication with the optical feed fiber and is configured to multiplex and demultiplex between the feeder optical signal and optical network unit signals.