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公开(公告)号：US10439722B2
公开(公告)日：2019-10-08
申请号：US16038122
申请日：2018-07-17
Applicant: Google LLC
Inventor： Liang Du , Yut Loy Chan , Xiangjun Zhao , Changhong Joy Jiang , Cedric Fung Lam , Daoyi Wang , Tao Zhang
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：US20190036302A1
公开(公告)日：2019-01-31
申请号：US16148526
申请日：2018-10-01
Applicant: Google LLC
Inventor： Tao Zhang , Liang Du , Xiangjun Zhao , Changhong Joy Jiang , Cedric Fung Lam , Shuang Yin , Adam Edwin Taylor Barratt
IPC: H01S5/042 , H04J14/02 , H01S5/068 , H04B10/25 , H01S5/0625
CPC classification number: H01S5/042 , H01S5/0428 , H01S5/06256 , H01S5/068 , H01S5/125 , H01S5/3013 , H04B10/2503 , H04B10/40 , H04J14/0265 , H04J14/0282
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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Patent Agency Ranking
公开(公告)号：US20180323875A1
公开(公告)日：2018-11-08
申请号：US16038122
申请日：2018-07-17
Applicant: Google LLC
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：US11594856B2
公开(公告)日：2023-02-28
申请号：US17057652
申请日：2019-05-07
Applicant: Google LLC
Inventor： Tao Zhang , Cedric Fung Lam , Shuang Yin , Xiangjun Zhao , Liang Du , Changhong Joy Jiang , Adam Edwin Taylor Barratt , Claudio Desanti , Muthu Nagarajan
IPC: H01S5/042 , H01S5/0625 , H01S5/068 , H01S5/323 , H04J4/00
Abstract: A method (900) includes delivering a first bias current (IGAIN) to an anode of gain-section diode (590a) and delivering a second bias current (IPH) to an anode of a phase-section diode (590b). The method also includes receiving a burst mode signal (514) indicative of a burst-on state or a burst-on state, and sinking a first sink current (ISINK) away from the first bias current when the burst mode signal is indicative of the burst-off state. When the burst mode signal transitions to be indicative of the burst-on state from the burst-off state, the method also includes sinking a second sink current away from the second bias current at the anode of the phase-section diode and ceasing the sinking of the first sink current away from the first bias current at the anode of the gain section diode.
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公开(公告)号：US10992387B2
公开(公告)日：2021-04-27
申请号：US16568759
申请日：2019-09-12
Applicant: Google LLC
Inventor： Cedric Fung Lam , Xiangjun Zhao , Shuang Yin , Muthu Nagarajan , Tao Zhang , Liang Du , Adam Edwin Taylor Barratt , Changhong Joy Jiang , Claudio Desanti
Abstract: A method of combining optical signals from a plurality of optical fibers into a single optical signal includes receiving, at corresponding optical-signal receivers optically coupled to corresponding trunk fibers, respective optical signals. The method further includes determining, by the corresponding optical-signal receivers, when each respective optical signal is received. When the respective optical signal is received, the method includes performing the following steps: converting, by the corresponding optical-signal receiver, the respective optical signal to a corresponding electrical signal; transmitting, by the corresponding optical-signal receiver, the corresponding electrical signal to a corresponding input channel of an electrical-multiplexing device; and configuring the electrical-multiplexing device to select the corresponding input channel. Configuring the electrical-multiplexing device to select the corresponding input channel causes the electrical-multiplexing device to transmit the corresponding electrical signal to an electro-optical converter configured to convert the corresponding electrical signal back to the respective optical signal.
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公开(公告)号：US20210083770A1
公开(公告)日：2021-03-18
申请号：US16568759
申请日：2019-09-12
Applicant: Google LLC
Inventor： Cedric Fung Lam , Xiangjun Zhao , Shuang Yin , Muthu Nagarajan , Tao Zhang , Liang Du , Adam Edwin Taylor Barratt , Changhong Joy Jiang , Claudio Desanti
Abstract: A method of combining optical signals from a plurality of optical fibers into a single optical signal includes receiving, at corresponding optical-signal receivers optically coupled to corresponding trunk fibers, respective optical signals. The method further includes determining, by the corresponding optical-signal receivers, when each respective optical signal is received. When the respective optical signal is received, the method includes performing the following steps: converting, by the corresponding optical-signal receiver, the respective optical signal to a corresponding electrical signal; transmitting, by the corresponding optical-signal receiver, the corresponding electrical signal to a corresponding input channel of an electrical-multiplexing device; and configuring the electrical-multiplexing device to select the corresponding input channel. Configuring the electrical-multiplexing device to select the corresponding input channel causes the electrical-multiplexing device to transmit the corresponding electrical signal to an electro-optical converter configured to convert the corresponding electrical signal back to the respective optical signal.
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公开(公告)号：US10461498B2
公开(公告)日：2019-10-29
申请号：US16148526
申请日：2018-10-01
Applicant: Google LLC
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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