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1. 发明授权

US11637630B2 Frequency division multiple access optical subcarriers 有权
公开(公告)号：US11637630B2
公开(公告)日：2023-04-25
申请号：US16578398
申请日：2019-09-23
申请人： Infinera Corporation
发明人： Jeffrey T. Rahn , Kuang-Tsan Wu , Steven J. Hand , David F. Welch
IPC分类号： H04B7/26 , H04B10/50 , H04B10/548 , H04B10/61 , H04B10/69 , H04J14/02 , H04L1/00 , H04L5/00 , H04J14/08 , H04J14/00 , H04B10/077 , H04B10/079 , H04B10/25 , H04B10/40 , H04Q11/00 , H04B10/2575 , H04J99/00
摘要： A network or system in which a hub or primary node may communicate with a plurality of leaf or secondary nodes. The hub node may operate or have a capacity greater than that of the leaf nodes. Accordingly, relatively inexpensive leaf nodes may be deployed to receive data carrying optical signals from, and supply data carrying optical signals to, the hub node. One or more connections may couple each leaf node to the hub node, whereby each connection may include one or more spans or segments of optical fibers, optical amplifiers, optical splitters/combiners, and optical add/drop multiplexer, for example. Optical subcarriers may be transmitted over such connections, each carrying a data stream. The subcarriers may be generated by a combination of a laser and a modulator, such that multiple lasers and modulators are not required, and costs may be reduced. As the bandwidth or capacity requirements of the leaf nodes change, the number of subcarriers, and thus the amount of data provided to each node, may be changed accordingly. Each subcarrier within a dedicated group of subcarriers may carry OAM or control channel information to a corresponding leaf node, and such information may be used by the leaf node to configure the leaf node to have a desired bandwidth or capacity.

2. 发明授权

US11075694B2 Frequency division multiple access optical subcarriers 有权
公开(公告)号：US11075694B2
公开(公告)日：2021-07-27
申请号：US16578393
申请日：2019-09-22
申请人： Infinera Corporation
发明人： Jeffrey T. Rahn , Kuang-Tsan Wu , Steven J. Hand , David F. Welch
IPC分类号： H04B7/26 , H04B10/50 , H04B10/548 , H04B10/61 , H04B10/69 , H04J14/02 , H04L1/00 , H04L5/00 , H04J14/08 , H04J14/00 , H04B10/077 , H04B10/079 , H04B10/25 , H04B10/40 , H04J99/00 , H04Q11/00 , H04B10/2575
摘要： A network or system in which a hub or primary node may communicate with a plurality of leaf or secondary nodes. The hub node may operate or have a capacity greater than that of the leaf nodes. Accordingly, relatively inexpensive leaf nodes may be deployed to receive data carrying optical signals from, and supply data carrying optical signals to, the hub node. One or more connections may couple each leaf node to the hub node, whereby each connection may include one or more spans or segments of optical fibers, optical amplifiers, optical splitters/combiners, and optical add/drop multiplexer, for example. Optical subcarriers may be transmitted over such connections, each carrying a data stream. The subcarriers may be generated by a combination of a laser and a modulator, such that multiple lasers and modulators are not required, and costs may be reduced. As the bandwidth or capacity requirements of the leaf nodes change, the number of subcarriers, and thus the amount of data provided to each node, may be changed accordingly. Each subcarrier within a dedicated group of subcarriers may carry OAM or control channel information to a corresponding leaf node, and such information may be used by the leaf node to configure the leaf node to have a desired bandwidth or capacity.

3. 发明授权

US11032020B2 Synchronization for subcarrier communication 有权
公开(公告)号：US11032020B2
公开(公告)日：2021-06-08
申请号：US16577960
申请日：2019-09-20
申请人： Infinera Corporation
发明人： Han H. Sun , Kuang-Tsan Wu , John D. McNicol
IPC分类号： H04B10/40 , H04B10/61 , H04J14/02 , H04L7/00
摘要： Methods, systems, and apparatus, including computer programs encoded on computer storage media, for clock synchronizing an optical system and multiple leaf systems. In some implementations, an apparatus includes a receiver comprising: a local oscillator laser providing a local oscillator signal, a detector circuit operable to receive a first optical signal and detect first data carried by the first optical signal based on the local oscillator signal, a reference clock circuit supplying a clock signal, a digital signal processor (DSP) operable to receive the first data and supply a control signal to the reference clock circuit based on the first data, the reference clock circuit being operable to adjust the clock signal based on the control signal; and a transmitter operable to output a second optical signal carrying second data, the second data having an associated rate that is based on the clock signal.

4. 发明申请

US20200382216A1 FREQUENCY DIVISION MULTIPLE ACCESS OPTICAL SUBCARRIERS 审中-公开
公开(公告)号：US20200382216A1
公开(公告)日：2020-12-03
申请号：US16578398
申请日：2019-09-23
申请人： Infinera Corporation
发明人： Jeffrey T. Rahn , Kuang-Tsan Wu , Steven J. Hand , David F. Welch
IPC分类号： H04B10/61 , H04B10/077 , H04B10/079
摘要： A network or system in which a hub or primary node may communicate with a plurality of leaf or secondary nodes. The hub node may operate or have a capacity greater than that of the leaf nodes. Accordingly, relatively inexpensive leaf nodes may be deployed to receive data carrying optical signals from, and supply data carrying optical signals to, the hub node. One or more connections may couple each leaf node to the hub node, whereby each connection may include one or more spans or segments of optical fibers, optical amplifiers, optical splitters/combiners, and optical add/drop multiplexer, for example. Optical subcarriers may be transmitted over such connections, each carrying a data stream. The subcarriers may be generated by a combination of a laser and a modulator, such that multiple lasers and modulators are not required, and costs may be reduced. As the bandwidth or capacity requirements of the leaf nodes change, the number of subcarriers, and thus the amount of data provided to each node, may be changed accordingly. Each subcarrier within a dedicated group of subcarriers may carry OAM or control channel information to a corresponding leaf node, and such information may be used by the leaf node to configure the leaf node to have a desired bandwidth or capacity.

5. 发明授权

US10601520B2 Clock recovery for digital subcarriers for optical networks 有权
公开(公告)号：US10601520B2
公开(公告)日：2020-03-24
申请号：US16270590
申请日：2019-02-07
申请人： Infinera Corporation
发明人： Han Henry Sun , Kuang-Tsan Wu , Steven Joseph Hand , Jeffrey T. Rahn
IPC分类号： H04B10/516 , H04B10/61 , H04B10/2575 , H04J14/02 , H04B10/50
摘要： Optical network systems and components are disclosed, including a transmitter comprising a digital signal processor that receives data; circuitry that generate a plurality of electrical signals based on the data; a plurality of filters, each of which receiving a corresponding one of the plurality of electrical signals, a plurality of roll-off factors being associated with a respective one of the plurality of filters; a plurality of DACs that receive outputs from the digital signal processor, the outputs being indicative of outputs from the plurality of filters; a laser that supplies light; and a modulator that receives the light and outputs from the DACs, and supplies a plurality of optical subcarriers based on the outputs, such that one of the optical subcarriers has a frequency bandwidth that is wider than remaining ones of the optical subcarriers, said one of the optical subcarriers carrying information for clock recovery.

6. 发明申请

US20190319713A1 APPARATUSES AND METHODS FOR DIGITAL SUBCARRIER PARAMETER MODIFICATIONS FOR OPTICAL COMMUNICATION NETWORKS 审中-公开
公开(公告)号：US20190319713A1
公开(公告)日：2019-10-17
申请号：US16384842
申请日：2019-04-15
申请人： Infinera Corporation
发明人： Steven Joseph Hand , Ahmed Awadala , Luis A. Perez , Vincent G. Dominic , Kuang-Tsan Wu
IPC分类号： H04B10/564 , H04B10/61 , H04B10/516 , H04L1/00
摘要： Optical network systems are disclosed, including systems having transmitters with a digital signal processor comprising forward error correction circuitry that provides encoded first electrical signals based on input data; and power adjusting circuitry that receives second electrical signals indicative of the first electrical signals, the power adjusting circuitry supplying third electrical signals, wherein each of the third electrical signals is indicative of an optical power level of a corresponding to one of a plurality of optical subcarriers output from an optical transmitter.

7. 发明申请

US20190245626A1 INDEPENDENTLY ROUTABLE DIGITAL SUBCARRIERS FOR OPTICAL COMMUNICATION NETWORKS 审中-公开
公开(公告)号：US20190245626A1
公开(公告)日：2019-08-08
申请号：US16270576
申请日：2019-02-07
申请人： Infinera Corporation
发明人： Jeffrey T. Rahn , Kuang-Tsan Wu , Steven Joseph Hand , Han Henry Sun
IPC分类号： H04B10/61 , H04J14/02 , H04B10/2575
CPC分类号： H04J14/0298 , H04B10/25752 , H04B10/505 , H04B10/516 , H04B10/611 , H04B10/612 , H04J14/0201
摘要： Optical network systems and components are disclosed including a transmitter comprising a digital signal processor receiving a plurality of independent data streams, the digital signal processor supplying outputs based on the plurality of independent data streams, the digital signal processor comprising a plurality of pulse shape filters corresponding to the plurality of independent data streams, the plurality of pulse shape filters configured to filter the independent data streams to produce a first subcarrier having a first frequency bandwidth and a second subcarrier having a second frequency bandwidth different than the first frequency bandwidth for the outputs.

8. 发明申请

US20190149389A1 DISTRIBUTION MATCHING FOR PROBABILISTIC CONSTELLATION SHAPING WITH AN ARBITRARY INPUT/OUTPUT ALPHABET 审中-公开
公开(公告)号：US20190149389A1
公开(公告)日：2019-05-16
申请号：US16152349
申请日：2018-10-04
申请人： Infinera Corporation
发明人： Mehdi Torbatian , Deyuan Chan , Han Henry Sun , Sandy Thomson , Kuang-Tsan Wu
IPC分类号： H04L27/36 , H04L27/34 , H04L25/06 , H04L1/00
摘要： Consistent with the present disclosure, an encoder circuit is provided at a transmit side of an optical fiber link that maps an input sequence of bits of fixed length k a sequence of symbols of a codeword of length n, such that the symbols of the codeword define a predetermined transmission probability distribution. Preferably, each symbol of the codeword is generated during a corresponding clock cycle, such that after n clock cycles, a complete codeword corresponding to the input bit sequence is output. On a receive end of the link, a decoder is provided that outputs the k-bit sequence every n clock cycles. Accordingly, buffers need not be provided at the output of the encoder and the input of the decoder, such that processing of the input sequence, codewords, and output sequence may be achieved efficiently without large buffers and complicated circuitry. Moreover, the input sequence, with any binary alphabet may be matched to a desired output distribution with any arbitrary alphabet. Accordingly, probabilistic constellation shaping may be achieved over constellations of arbitrary size. In addition, relatively long codewords, may be encoded and decoded with the apparatus and method disclosed herein. Accordingly, for a fixed SNR a higher SE (more bits per symbol) can be achieved. Alternatively, for a fixed SE, a lower SNR may be sufficient. Moreover, the resulting SE may be finely tailored to a particular optical link SNR to provide data transmission rates that are higher than the low order modulation formats that would otherwise be employed for optical signals carried by such links.

9. 发明授权

US09553675B2 Frequency domain coded modulation with polarization interleaving for fiber nonlinearity mitigation in digital sub-carrier coherent optical communication systems 有权
标题翻译：在数字副载波相干光通信系统中，用于光纤非线性缓解的偏振交织的频域编码调制
公开(公告)号：US09553675B2
公开(公告)日：2017-01-24
申请号：US14754521
申请日：2015-06-29
申请人： Infinera Corporation
发明人： Abdullah S. Karar , Han Sun , Ahmad Awadalla , Kuang-Tsan Wu
IPC分类号： H04B10/00 , H04B10/532 , H04B10/61
CPC分类号： H04B10/532 , H04B10/5055 , H04B10/6162 , H04J14/06
摘要： An optical transmitter may receive and encode a first group of bits into first encoded data and second encoded data. The optical transmitter may supply a first sub-carrier carrying a first symbol and a second sub-carrier carrying a second symbol. The first symbol and the second symbol may be based on the first encoded data and the second encoded data, respectively, such that the first sub-carrier has a first polarization state comprising first and second polarization components, and the second sub-carrier has a second polarization state comprising first and second polarization components. The first polarization state may be substantially orthogonal to the second polarization state. An optical receiver may receive the first symbol via the first sub-carrier, may receive the second symbol via the second sub-carrier, may decode the first symbol and the second symbol into a second group of bits, and may output the second group of bits.
摘要翻译：光发射机可以将第一组比特接收和编码为第一编码数据和第二编码数据。光发射机可以提供承载第一符号的第一子载波和承载第二符号的第二子载波。第一符号和第二符号可以分别基于第一编码数据和第二编码数据，使得第一子载波具有包括第一和第二偏振分量的第一偏振状态，并且第二子载体具有第二偏振状态包括第一和第二偏振分量。第一偏振状态可以基本上与第二偏振状态正交。光接收机可以经由第一子载波接收第一符号，经由第二子载波接收第二符号，可以将第一符号和第二符号解码为第二组比特，并且可以输出第二组位。

10. 发明授权

US09160454B2 Hamming coded modulation 有权
标题翻译：汉明编码调制
公开(公告)号：US09160454B2
公开(公告)日：2015-10-13
申请号：US14042401
申请日：2013-09-30
申请人： Infinera Corporation
发明人： Han H. Sun , Kuang-Tsan Wu
IPC分类号： H04B10/50 , H04B10/556 , H04L1/00 , H04J14/02 , H04B10/61
CPC分类号： H04B10/5561 , H04B10/505 , H04B10/5055 , H04B10/612 , H04B10/613 , H04B10/616 , H04J14/02 , H04L1/0052 , H04L1/0058
摘要： An optical system may include a digital signal processor (DSP) to receive first samples of a digital signal. The first samples may be Hamming encoded. The DSP may correlate the first samples to multiple groups of second samples to determine multiple correlation values. Each of the multiple groups of second samples may correspond to respective code words. Each of the multiple correlation values may correspond to a correlation measurement between the first samples and each of the multiple groups of second samples. The DSP may determine a particular code word, of the multiple code words, corresponding to one of the correlation values of the multiple correlation values; determine output bits based on bits of the particular code word and the one of the correlation values; and provide the output bits. The output bits may include data associated with the digital signal.
摘要翻译：光学系统可以包括用于接收数字信号的第一采样的数字信号处理器（DSP）。第一个样本可能是汉明编码的。 DSP可以将第一样本与多组第二样本相关联，以确定多个相关值。多组第二样本中的每一组可对应于相应的代码字。多个相关值中的每一个可对应于第一样本与多组第二样本中的每一组之间的相关性测量。 DSP可以确定与多个相关值的相关值之一相对应的多个码字的特定码字; 基于特定码字的比特和相关值之一来确定输出比特; 并提供输出位。输出位可以包括与数字信号相关联的数据。

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