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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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2.发明授权公开(公告)号：US11990944B1
公开(公告)日：2024-05-21
申请号：US17650644
申请日：2022-02-10
发明人： Haipeng Zhang , Mu Xu , Zhensheng Jia , Luis Alberto Campos
CPC分类号： H04B10/70 , H01S5/1032 , H01S5/3412
摘要： A method for generating optical communication signals in a communication network includes (1) generating at least a first optical tone and a second optical tone using a quantum dot (QD) coherent comb laser (CCL), the first and second optical tones having different respective wavelengths, (2) modulating the first optical tone according to a first modulation signal to generate a first communication signal, and (3) modulating the second optical tone according to a second modulation signal to generate a second communication signal.
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3.发明授权公开(公告)号：US11956351B1
公开(公告)日：2024-04-09
申请号：US18126995
申请日：2023-03-27
CPC分类号： H04L9/0855 , H04B10/27 , H04L9/0891 , H04L9/14 , H04L2209/80
摘要： A first node of a network includes a quantum receiver, a classical transceiver, and an initial-key generator that cooperate with a second node of the network to receive an initial key via the quantum receiver. The first node includes a key-series generator that (i) decrypts, with the initial key, a first encrypted key of a series of encrypted keys to generate a first unencrypted key of a respective series of unencrypted keys and (ii) decrypts each subsequent encrypted key of the series of encrypted keys with a preceding unencrypted key of the series of unencrypted keys to generate a subsequent unencrypted key of the series of unencrypted keys. The first node includes one or both of a decryptor and an encryptor. The decryptor decrypts encrypted data using a last unencrypted key of the series of unencrypted keys. The encryptor encrypts unencrypted data using the last unencrypted key.
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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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公开(公告)号：US11799550B2
公开(公告)日：2023-10-24
申请号：US17734338
申请日：2022-05-02
IPC分类号： H04B10/2507 , H04B10/54 , H04B10/69 , H03M3/00
CPC分类号： H04B10/2507 , H04B10/541 , H04B10/697 , H03M3/424 , H03M3/43
摘要： An analog signal processor includes a sampling unit configured to (i) filter, in the frequency domain, a received time domain analog signal into a low-frequency end of a corresponding frequency spectrum, (ii) sample the filtered analog signal at a frequency substantially higher than the low-frequency end, and (iii) spread quantization noise over an expanded Nyquist zone of the corresponding frequency spectrum. The processor further includes a noise shaping unit configured to shape the spread quantization noise out of the low-frequency end of the corresponding frequency spectrum such that the filtered analog signal and the shaped quantization noise are substantially separated in the frequency domain, and a quantization unit configured to apply delta-sigma modulation to the filtered analog signal using at least one quantization bit, and output a digitized bit stream that substantially follows the amplitude of the received time domain analog signal.
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公开(公告)号：US20230336247A1
公开(公告)日：2023-10-19
申请号：US18214142
申请日：2023-06-26
CPC分类号： H04B10/504 , H04J14/04 , H04B10/506 , H04B10/505 , H04B10/502 , H04B10/63 , H04B10/64 , H04B10/532 , H04J14/06
摘要： A transmitter for an optical communication network includes a primary laser source input substantially confined to a single longitudinal mode, an input data stream, and a modulator including at least one secondary laser having a resonator frequency of the single longitudinal mode of the primary laser source. The modulator is configured to receive the primary laser source input and the input data stream, and output a laser modulated data stream.
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公开(公告)号：US11689291B2
公开(公告)日：2023-06-27
申请号：US17854564
申请日：2022-06-30
发明人： Haipeng Zhang , Junwen Zhang , Mu Xu , Zhensheng Jia , Luis Alberto Campos
CPC分类号： H04B10/504 , G02B27/283 , G02B27/286 , G02F1/218 , H01S5/3224 , H01S5/32391 , H04B10/25 , H04B10/5161 , G02F1/212
摘要： An optical full-field transmitter for an optical communications network includes a primary laser source configured to provide a narrow spectral linewidth for a primary laser signal, and a first intensity modulator in communication with a first amplitude data source. The first intensity modulator is configured to output a first amplitude-modulated optical signal from the laser signal. The transmitter further includes a first phase modulator in communication with a first phase data source and the first amplitude-modulated optical signal. The first phase modulator is configured to output a first two-stage full-field optical signal. The primary laser source has a structure based on a III-V compound semiconductor.
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公开(公告)号：US11677477B2
公开(公告)日：2023-06-13
申请号：US17498232
申请日：2021-10-11
发明人： Mu Xu , Zhensheng Jia
IPC分类号： H04B10/61 , H04B10/2575 , H04L1/00
CPC分类号： H04B10/616 , H04B10/2575 , H04L1/0036
摘要： Methods, systems, and devices for a decision directed multi-modulus searching algorithm are described. A receiver may receive a signal including a set of data symbols. The receiver may iteratively determine a set of centroids for demodulating the set of data symbols (e.g., as part of a training procedure). The centroids may be used to demodulate the set of data symbols according to a modulation constellation associated with the set of data symbols. The training procedure may include, for each data symbol of a subset of data symbols, assigning a centroid of the set of centroids to each data symbol and updating the set of centroids based on assigning the centroid to each data symbol. The receiver may demodulate the set of data symbols based on the updated set of centroids.
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