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公开(公告)号：US10243687B2
公开(公告)日：2019-03-26
申请号：US15354811
申请日：2016-11-17
Applicant: Google Inc.
Inventor： Xiangjun Zhao , Cedric Fung Lam , Shuang Yin , Changhong Joy Jiang , Ke Dong
Abstract: A method of establishing communication between an optical line terminal and an optical network unit within an optical access network includes receiving a signal indication from an optical transceiver of an optical line terminal. The signal indication includes: (i) a loss-of-signal indication indicating non-receipt of an upstream optical signal from the optical network unit; or (ii) a signal-received indication indicating receipt of the upstream optical signal from the optical network unit. The method includes determining whether the signal indication includes the loss-of-signal indication. When the signal indication includes the loss-of-signal indication, the method includes instructing the optical transceiver to cease signal transmission from the optical transceiver to the optical network unit. Moreover, when the signal indication includes the signal-received indication, the method includes instructing the optical transceiver to transmit a downstream optical signal from the optical transceiver to the optical network unit.
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公开(公告)号：US10103513B1
公开(公告)日：2018-10-16
申请号：US15631594
申请日：2017-06-23
Applicant: Google Inc.
Inventor： Tao Zhang , Liang Du , Xiangjun Zhao , Changhong Joy Jiang , Cedric Fung Lam , Shuang Yin , Adam Edwin Taylor Barratt
Abstract: A method for biasing a tunable laser during burst-on and burst-off states through a common-cathode laser driving circuit includes delivering a bias current to an anode of a gain-section diode having a shared substrate with the laser, and receiving a burst mode signal indicative of a burst-on state or a burst-off state. When the burst mode signal is indicative of the burst-off state, the method includes sinking a sink current away from the anode of the gain-section diode. The sink current is less than the bias current delivered to the anode of the gain-section diode. When the burst mode signal transitions to be indicative of the burst-on state from the burst-off state, the method includes ceasing the sinking of the sink current away from the anode of the gain-section diode, and delivering an overshoot current to the anode of the gain-section diode to accelerate heating of the gain-section diode.
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公开(公告)号：US20180139006A1
公开(公告)日：2018-05-17
申请号：US15354811
申请日：2016-11-17
Applicant: Google Inc.
Inventor： Xiangjun Zhao , Cedric Fung Lam , Shuang Yin , Changhong Joy Jiang , Ke Dong
CPC classification number: H04J14/0295 , H04J14/0246 , H04J14/0249 , H04J2014/0253 , H04Q11/0067 , H04Q2011/0081 , H04Q2011/0083
Abstract: A method of establishing communication between an optical line terminal and an optical network unit within an optical access network includes receiving a signal indication from an optical transceiver of an optical line terminal. The signal indication includes: (i) a loss-of-signal indication indicating non-receipt of an upstream optical signal from the optical network unit; or (ii) a signal-received indication indicating receipt of the upstream optical signal from the optical network unit. The method includes determining whether the signal indication includes the loss-of-signal indication. When the signal indication includes the loss-of-signal indication, the method includes instructing the optical transceiver to cease signal transmission from the optical transceiver to the optical network unit. Moreover, when the signal indication includes the signal-received indication, the method includes instructing the optical transceiver to transmit a downstream optical signal from the optical transceiver to the optical network unit.
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公开(公告)号：US20170155461A1
公开(公告)日：2017-06-01
申请号：US15428859
申请日：2017-02-09
Applicant: Google Inc.
Inventor： Xiangjun Zhao , Chiachi Wang , Daoyi Wang , Cedric Fung Lam , Liang Du , Changhong Joy Jiang
CPC classification number: H04J14/0223 , H04B10/296 , H04J14/0205 , H04J14/0221 , H04J14/0282 , H04J14/083
Abstract: A communication system includes a first optical system and a second optical system optically connected to a clamping laser and a pump laser. The first optical system includes first and second optical splitters. The first optical splitter is configured to receive a clamping laser signal from the clamping laser and split the signal into split clamping laser signals. The second optical splitter is configured to receive a pump laser signal from the pump laser and split signal into split pump laser signals. The second optical system is optically connected to the first optical system and includes amplifier systems. Each amplifier system is configured to receive a multiplexed signal. The second optical system includes first and second combiners optically connected to an erbium-doped fiber. The first combiner is optically connected to the first splitter, and the second combiner is optically connected to the second splitter.
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公开(公告)号：US09453920B1
公开(公告)日：2016-09-27
申请号：US15002500
申请日：2016-01-21
Applicant: Google Inc.
Inventor： Zixia Huang , Marvin Weinstein , Nicholas Ng , Ke Dong , Cedric Fung Lam , Tony Ong , Wenlei Dai
CPC classification number: G01S19/28 , G01S19/05 , G01S19/23 , H04B10/0791 , H04B10/118
Abstract: A method for selecting a global positioning receiver includes receiving global positioning system signals from global positioning system receivers. The global positioning system receivers receive the global positioning system signals from corresponding global positioning system satellites. The method also includes replicating the global positioning system signals from the global positioning system receivers, determining a signal drift and a phase precision for each global positioning system signal, and selecting one of the global positioning system signals based on the corresponding signal drift and the phase precision of the global positioning system signal.
Abstract translation: 用于选择全球定位接收机的方法包括从全球定位系统接收机接收全球定位系统信号。 全球定位系统接收机从相应的全球定位系统卫星接收全球定位系统信号。 该方法还包括从全球定位系统接收器复制全球定位系统信号，确定每个全球定位系统信号的信号漂移和相位精度，以及基于对应的信号漂移和相位选择全球定位系统信号之一 精准的全球定位系统信号。
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Patent Agency Ranking
公开(公告)号：US10171199B2
公开(公告)日：2019-01-01
申请号：US15385798
申请日：2016-12-20
Applicant: Google Inc.
Inventor： Xiangjun Zhao , Daoyi Wang , Liang Du , Changhong Joy Jiang , Cedric Fung Lam
IPC: H04B10/27 , H04J14/02 , H04Q11/00 , H04B10/572 , H01S5/0625
Abstract: A system includes a multiplexer having a pass-band and an optical network unit (ONU) optically coupled to the multiplexer. The ONU includes a tunable laser configured to continuously transmit an optical signal to the multiplexer in a burst-on state and a burst-off state. While in the burst-on state, the ONU is configured to tune the tunable laser to transmit the optical signal at a transmit wavelength within the wavelength pass-band of the multiplexer. The multiplexer configured to allow passage therethrough of the optical signal at the transmit wavelength. While in the burst-off state, the ONU is configured to tune the tunable laser to transmit the optical signal at a non-transmit wavelength outside of the wavelength pass-band of the multiplexer. The multiplexer configured to block passage therethrough of the optical signal at the non-transmit wavelength.
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公开(公告)号：US10063944B2
公开(公告)日：2018-08-28
申请号：US15385726
申请日：2016-12-20
Applicant: Google Inc.
Inventor： Liang Du , Yut Loy Chan , Xiangjun Zhao , Changhong Joy Jiang , Cedric Fung Lam , Daoyi Wang , Tao Zhang
IPC: H04Q11/00
CPC classification number: H04Q11/0005 , H04J14/02 , H04J14/0287 , H04J14/08 , H04Q11/0067 , H04Q2011/0035 , H04Q2011/0052 , H04Q2011/0081
Abstract: A remote node includes a first node input, a second node input, and an optical switch. The optical switch includes a first switch input optically coupled to the first node input, a second switch input optically coupled to the second node input, a first switch output switchably coupled to the first switch input or the second switch input, and a second switch output switchably coupled to the first switch input or the second switch input. The remote node includes a photodiode optically coupled to the second switch output, and a capacitor electrically coupled to the photodiode and the optical switch. When the first switch input is switchably coupled to the first switch output, the second switch input is switchably coupled to the second switch output. Light received by the second switch input passes out the second switch output to the photodiode. The photodiode charges the capacitor to a threshold charge.
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公开(公告)号：US10050708B2
公开(公告)日：2018-08-14
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 Fung Lam , Daoyi Wang , Tao Zhang
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.
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公开(公告)号：US20180175964A1
公开(公告)日：2018-06-21
申请号：US15385798
申请日：2016-12-20
Applicant: Google Inc.
Inventor： Xiangjun Zhao , Daoyi Wang , Liang Du , Changhong Joy Jiang , Cedric Fung Lam
CPC classification number: H04J14/0242 , H04B10/27 , H04B10/572 , H04Q11/0066 , H04Q11/0067 , H04Q2011/0018
Abstract: A system includes a multiplexer having a pass-band and an optical network unit (ONU) optically coupled to the multiplexer. The ONU includes a tunable laser configured to continuously transmit an optical signal to the multiplexer in a burst-on state and a burst-off state. While in the burst-on state, the ONU is configured to tune the tunable laser to transmit the optical signal at a transmit wavelength within the wavelength pass-band of the multiplexer. The multiplexer configured to allow passage therethrough of the optical signal at the transmit wavelength. While in the burst-off state, the ONU is configured to tune the tunable laser to transmit the optical signal at a non-transmit wavelength outside of the wavelength pass-band of the multiplexer. The multiplexer configured to block passage therethrough of the optical signal at the non-transmit wavelength.
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公开(公告)号：US09948422B2
公开(公告)日：2018-04-17
申请号：US15428859
申请日：2017-02-09
Applicant: Google Inc.
Inventor： Xiangjun Zhao , Chiachi Wang , Daoyi Wang , Cedric Fung Lam , Liang Du , Changhong Joy Jiang
CPC classification number: H04J14/0223 , H04B10/296 , H04J14/0205 , H04J14/0221 , H04J14/0282 , H04J14/083
Abstract: A communication system includes a first optical system and a second optical system optically connected to a clamping laser and a pump laser. The first optical system includes first and second optical splitters. The first optical splitter is configured to receive a clamping laser signal from the clamping laser and split the signal into split clamping laser signals. The second optical splitter is configured to receive a pump laser signal from the pump laser and split signal into split pump laser signals. The second optical system is optically connected to the first optical system and includes amplifier systems. Each amplifier system is configured to receive a multiplexed signal. The second optical system includes first and second combiners optically connected to an erbium-doped fiber. The first combiner is optically connected to the first splitter, and the second combiner is optically connected to the second splitter.
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