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公开(公告)号：US11996893B2
公开(公告)日：2024-05-28
申请号：US18092372
申请日：2023-01-02
发明人： Junwen Zhang , Zhensheng Jia , Luis Alberto Campos , Haipeng Zhang , Mu Xu , Jing Wang , Curtis Dean Knittle , Chuang Zhou
CPC分类号： H04B10/504 , H04B10/502 , H04B10/505 , H04B10/506 , H04B10/532 , H04B10/63 , H04B10/64 , H04J14/04 , H04J14/06
摘要： An injection locked transmitter for an optical communication network includes a master seed laser source input substantially confined to a single longitudinal mode, an input data stream, and a laser injected modulator including at least one slave laser having a resonator frequency that is injection locked to a frequency of the single longitudinal mode of the master seed laser source. The laser injected modulator is configured to receive the master seed laser source input and the input data stream, and output a laser modulated data stream.
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2.发明授权公开(公告)号：US11876556B1
公开(公告)日：2024-01-16
申请号：US17959015
申请日：2022-10-03
IPC分类号： H04B10/079 , H04B10/40 , H04J14/02
CPC分类号： H04B10/0793 , H04B10/40 , H04J14/023 , H04J14/0223
摘要： A method for implementing an out-of-band communication channel in a coherent optical access network includes steps (a)-(e). Step (a) includes separating a MAC-layer signal received from a media access control (MAC) layer into an initial communication-channel signal and an initial data-channel signal. Step (b) includes encoding, using a first signal-coding scheme within a transceiver of a coherent passive optical network (PON), the initial communication-channel signal into a communication-channel signal occupying a first frequency band. Step (c) includes encoding, using a second signal-coding scheme within the transceiver, the initial data-channel signal into a data-channel signal occupying a second frequency band not overlapping the first frequency band. Step (d) includes combining the communication-channel signal and the data-channel signal to yield an analog signal. Step (e) includes driving, with the analog signal, an optical modulator to modulate a coherent optical signal for output on a fiber optical path of the coherent PON.
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公开(公告)号：US11689286B1
公开(公告)日：2023-06-27
申请号：US17541868
申请日：2021-12-03
发明人： Mu Xu , Junwen Zhang , Haipeng Zhang , Zhensheng Jia , Luis Alberto Campos
IPC分类号： H04B10/00 , H04B10/2507 , H04B10/58
CPC分类号： H04B10/2507 , H04B10/58
摘要： A skew compensation system for a coherent optical communication network includes a transmitter and a receiver in operable communication with an optical transport medium of a coherent optical network. The transmitter includes a first transmitter-side tunable delay line configured to delay transmission of a first signal by a first skew amount, thereby producing a pre-compensated first signal. The receiver includes a first receiver-side tunable delay line configured to delay transmission of the pre-compensated first signal to a digital signal processor (DSP) of the receiver by a second skew amount, thereby producing a final signal that is both pre-compensated and post-compensated (i.e., fully compensated).
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公开(公告)号：US20230179306A1
公开(公告)日：2023-06-08
申请号：US18104465
申请日：2023-02-01
发明人： Junwen Zhang , Luis Alberto Campos , Zhensheng Jia
IPC分类号： H04B10/61
CPC分类号： H04B10/616
摘要： An optical network communication system utilizes a coherent passive optical network (PON). The system includes an optical line terminal (OLT) having a downstream transmitter and an upstream receiver system configured for time-wavelength division coherent detection. The system further includes a splitter in operable communication with the OLT, and a plurality of optical network units (ONUs) in operable communication with the splitter. Each of the plurality of ONUs is configured to (i) receive downstream coherent burst signals from the OLT, and (ii) transmit at least one upstream burst signal to the OLT. The upstream receiver system further includes a power control module and a local oscillator (LO) configured to generate an optical LO signal The power control module is configured to adaptively control, in real-time, a power level of the optical LO signal.
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公开(公告)号：US11539441B1
公开(公告)日：2022-12-27
申请号：US17219563
申请日：2021-03-31
发明人： Mu Xu , Junwen Zhang , Haipeng Zhang , Zhensheng Jia , Luis Alberto Campos , Curtis D. Knittle
IPC分类号： H04B10/516 , H04B10/2513
摘要： A method for laser chirp precompensation includes modulating an amplitude of an optical signal, in response to an amplitude of one of (i) a chirp-compensated signal generated via distortion of an original modulated signal according to an inverse of a chirp-response function of a laser and (ii) a first signal derived from the chirp-compensated signal, to yield an amplitude-modulated optical signal. The method also includes modulating a phase of the amplitude-modulated optical signal in response to a phase of one of (i) the chirp-compensated signal and (ii) a second signal derived from the chirp-compensated signal to yield a chirp-compensated optical signal.
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公开(公告)号：US11245970B1
公开(公告)日：2022-02-08
申请号：US17149589
申请日：2021-01-14
发明人： Zhensheng Jia , Junwen Zhang , Mu Xu , Haipeng Zhang , Luis Alberto Campos
IPC分类号： H04B10/032 , H04Q11/00
摘要： An optical link redundancy architecture includes an optical switch, an optical coupler, and an optical tap detector. The optical switch including a hub-side switch-port, a normal-mode switch-port, and a failover-mode switch-port. The optical coupler includes (i) a normal-mode coupler-port optically coupled to the normal-mode switch-port via a primary-path optical fiber, and (ii) a failover-mode coupler-port optically coupled to the failover-mode switch-port via a backup-path optical fiber. The optical tap detector (i) is optically coupled to the primary-path optical fiber, (ii) includes a monitor port communicatively coupled to the optical switch, and (iii) outputs a tap signal at the monitor port in response to an optical signal propagating in the primary-path optical fiber. The optical switch optically couples the hub-side switch-port to the failover-mode switch-port when the tap signal is less than a threshold value.
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公开(公告)号：US12095512B1
公开(公告)日：2024-09-17
申请号：US18211482
申请日：2023-06-19
发明人： Haipeng Zhang , Junwen Zhang , Jingjie Zhu , Mu Xu , Zhensheng Jia
IPC分类号： H04B10/69 , H04B10/516
CPC分类号： H04B10/6932 , H04B10/5161
摘要： A method for allocating bandwidth to a first ONU, a second ONU, M1 ONUs, and M2 ONUs includes, during an allocation cycle, (i) granting a respective upstream time slot to, of a plurality of N ONUs, only each of the M1 ONUs, and (ii) granting a first upstream time slot to the first ONU. Each of the M1 ONUs and M2 ONUs is one of the plurality of N ONUs. The method also includes, during a subsequent cycle, (i) granting a respective upstream time slot to, of the plurality of N ONUs, only each of the M2 ONUs. The N ONUs includes a skipped-ONU that is one of either, and not both, the M1 ONUs and the M2 ONUs. The method includes, during the subsequent allocation cycle, granting a second upstream time slot to a second ONU, which is not one of the plurality of N ONUs.
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公开(公告)号：US11909512B1
公开(公告)日：2024-02-20
申请号：US17690760
申请日：2022-03-09
CPC分类号： H04J14/002 , H01S5/4006 , H04B10/506 , H04B10/5053 , H04B10/80 , H04B10/505
摘要： A coherent optical injection locking (COIL) apparatus generates multiple optical source outputs from a single optical source generated by a parent laser. The COIL apparatus includes a plurality of optical source generators each having a child laser, of lesser performance than the parent laser, that is injection locked to the single optical source. The optical source generators may have one or both of a shared configuration and a cascaded configuration that replicates the single optical source, or a single wavelength of the single optical source when it is a comb source.
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公开(公告)号：US11863297B1
公开(公告)日：2024-01-02
申请号：US17861613
申请日：2022-07-11
发明人： Junwen Zhang , Zhensheng Jia , Mu Xu , Haipeng Zhang , Luis Alberto Campos , Curtis Dean Knittle
CPC分类号： H04J14/06 , H04B10/614 , H04B10/6162 , H04B10/6165 , H04B10/6166 , H04B10/677
摘要： A digital receiver is configured to process a polarization multiplexed carrier from a communication network. The polarization multiplexed carrier includes a first polarization and a second polarization. The receiver includes a first lane for transporting a first input signal of the first polarization, a second lane for transporting a second input signal of the second polarization, a dynamic phase noise estimation unit disposed within the first lane and configured to determine a phase noise estimate of the first input signal, a first carrier phase recovery portion configured to remove carrier phase noise from the first polarization based on a combination of the first input signal and a function of the determined phase noise estimate, and a second carrier phase recovery portion configured to remove carrier phase noise from the second polarization based on a combination of the second input signal and the function of the determined phase noise estimate.
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公开(公告)号：US11804904B1
公开(公告)日：2023-10-31
申请号：US17384403
申请日：2021-07-23
发明人： Haipeng Zhang , Zhensheng Jia , Junwen Zhang , Mu Xu , Luis Alberto Campos
IPC分类号： H04B10/00 , H04B10/50 , H04B10/61 , H04B10/112
CPC分类号： H04B10/505 , H04B10/1121 , H04B10/614
摘要： A beam steering subsystem is provided in an optical communication system. The beam steering subsystem is configured for steering a free-space optical (FSO) beam from a first transceiver to a second transceiver disposed remotely from the first receiver. The beam steering subsystem includes a beam steering device disposed between the first transceiver and the second transceiver, and an optical tracking unit in optical communication and electrical communication with the beam steering device. The wherein the beam steering device is further configured to (i) receive the FSO beam from the first transceiver, (ii) receive an optical tracking signal from the second transceiver, (iii) optically relay the received optical tracking signal to the optical tracking unit, and (iv) steer the FSO beam to the second transceiver based on an electrical feedback control signal from optical tracking unit.
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