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公开(公告)号：US20240348361A1
公开(公告)日：2024-10-17
申请号：US18685198
申请日：2022-08-19
申请人： MIMOPT TECHNOLOGY
发明人： Ghaya REKAYA , Akram ABOUSEIF
摘要： The present invention relates to a method for dual-polarisation SDM transmission over optical fibre. The transmission method uses specific I/Q coding for combating the effects of PDL. The modulation symbols to be transmitted on the 2N polarisation states of the N wavelengths are broken down into real values and imaginary values (220). A first orthogonal linear transformation (230-1) is applied to the vector of the real values thus obtained and a second orthogonal linear transformation (230-2), separate from the first, is applied to the vector of the imaginary values thus obtained. A complex scalar solving an irreducible polynome of [X] in is multiplied with the first or second transformed vector before the two transformed vectors are summed (240) in order to provide a vector of transmission symbols for modulating the different states of polarisation of the spatial elementary channels.
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公开(公告)号：US12040833B2
公开(公告)日：2024-07-16
申请号：US17578538
申请日：2022-01-19
发明人： Junil Choi , Geonho Han , Hyuckjin Choi , Beomsoo Ko
IPC分类号： H04B10/116 , H04B10/532 , H04B10/61 , H04J14/06
CPC分类号： H04B10/116 , H04B10/532 , H04B10/6151 , H04J14/06
摘要： A method and an apparatus for polarization multiplexing and encoding in a visible light communication system based on a gold nanoparticle are provided. A method for encoding in a receiver using a polarizing characteristic in a visible light communication system based on a gold nanoparticle, which is performed by a computer device, includes splitting a receive signal into left circular polarization light and right circular polarization light by allowing the receive signal to pass through a linear polarizer and estimating a phase retardation difference, and detecting a transmit symbol by estimating the phase retardation difference.
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公开(公告)号：US12028112B2
公开(公告)日：2024-07-02
申请号：US18210831
申请日：2023-06-16
发明人： Luis Alberto Campos
CPC分类号： H04B10/504 , H04B10/502 , H04B10/505 , H04B10/506 , H04B10/532 , H04B10/63 , H04B10/64 , H04J14/04 , H04J14/06
摘要： Methods, systems, and devices for network communications to reduce optical beat interference (OBI) in upstream communications are described. For example, a fiber node may provide a seed source to injection lock upstream laser diodes. Therefore, upstream communications from each injection locked laser diode may primarily include the wavelength associated with each seed source. The seed sources may be unique to each end device and configured to minimize OBI. That is, the upstream laser diodes may be generic, but the collected seed source may enable upstream communications at varying wavelengths. The end device may provide upstream communications by externally modulating a signal generated by the injection locked laser diode.
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公开(公告)号：US11968035B1
公开(公告)日：2024-04-23
申请号：US17393102
申请日：2021-08-03
发明人： Long Chen
CPC分类号： H04J14/06 , G02B27/283 , G02B27/286 , G02F1/212 , H04B10/50 , H04B10/60 , H04J14/02
摘要： In part, in one aspect, the disclosure relates to a system including an integrated optical multiplexer. The integrated optical multiplexer may include a plurality of optical inputs configured and constructed to receive input optical signals; two or more stages of multiplexing in a cascading configuration, wherein the two or more stages of multiplexing are divided into wavelength stages and a last stage, wherein each of the wavelength stages combine subsets of input optical signals by wavelength, the last stage combines input optical signals by polarization using a polarization beam combiner, and at a combined output of the integrated optical multiplexer a first subset of the input optical signals have a different polarization than a second subset of the input optical signals.
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5.发明公开公开(公告)号：US20240056214A1
公开(公告)日：2024-02-15
申请号：US18492575
申请日：2023-10-23
申请人： Lucidean, Inc.
发明人： Aaron Maharry , Hector Adolfo Andrade Paez , Clint Lee Schow , Larry Allen Coldren , James Franklin Buckwalter
IPC分类号： H04J14/06 , H04B10/077 , H04B10/63
CPC分类号： H04J14/06 , H04B10/077 , H04B10/63
摘要： A polarization-multiplexed self-homodyne analog coherent (PM-SH-ACD) architecture for optical communication links has a receiver section that polarization un-rotates a signal from a fiber optic cable into first and second polarized optical signals; recovers a polarization of the first and second optical signals based on a received polarization recovery signal that is based on a pilot signal measurement signal; demodulates the first optical signal into optical QPSK data and pilot tone signals; demodulates the second optical signal into an optical modulating laser light; splits the first and second optical signals into optical QPSK quadrature signals; converts the optical QPSK quadrature signals into electrical QPSK quadrature signals; detects a polarization of the pilot tone signal and outputs the pilot signal measurement signal polarization recovery signal based on the detected polarization.
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公开(公告)号：US20240019721A1
公开(公告)日：2024-01-18
申请号：US18359678
申请日：2023-07-26
申请人： VIAVI SOLUTIONS INC.
IPC分类号： G02F1/01 , H04B10/532 , H04B10/2569 , H04J14/06 , G02B3/00 , G02B6/27
CPC分类号： G02F1/0136 , H04B10/532 , H04B10/2569 , H04J14/06 , G02B3/0087 , G02B6/2786 , G02F1/0139
摘要： A polarization scrambler using a retardance element (RE) is disclosed. The polarization scrambler may include an optical fiber input to transmit an optical signal, and a beam expander to receive and expand the optical signal to create an expanded optical signal. The polarization scrambler may include a retardance element (RE) to cause a polarization scrambling effect on the expanded optical signal and to create a scrambled expanded optical signal. The polarization scrambler may include a beam reducer to receive and reduce the scrambled expanded optical signal to create a scrambled optical signal. The polarization scrambler may include an optical fiber output to receive scrambled optical signal. The optical fiber output may transmit the scrambled optical signal to one or more downstream optical components.
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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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8.发明公开公开(公告)号：US20230361871A1
公开(公告)日：2023-11-09
申请号：US18139589
申请日：2023-04-26
发明人： Zhiping JIANG , Xiang LIN
IPC分类号： H04B10/077 , H04J14/06
CPC分类号： H04B10/0775 , H04J14/06
摘要： A method for measuring polarization-dependent loss (PDL) of an optical link segment. The method has the steps of: measuring powers of first and second pilot tones (PTs) in a polarization-multiplexed (PM) optical signal at first and second link locations at or about an input and an output end of the optical link segment, respectively, the PM optical signal having first and second optical signals with orthogonal polarizations and amplitude-modulated by the first and second PTs, respectively; calculating a first orthogonal polarization power ratio (OPPR) of the first and second PTs using the powers thereof measured at the first link location; calculating a second OPPR of the first and second PTs using the powers thereof measured at the second link location; and calculating the PDL of the optical link segment based on a comparison between the first and second OPPRs.
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公开(公告)号：US20230353248A1
公开(公告)日：2023-11-02
申请号：US18210831
申请日：2023-06-16
发明人： LUIS ALBERTO CAMPOS
CPC分类号： H04B10/504 , H04B10/63 , H04B10/532 , H04B10/505 , H04B10/502 , H04B10/64 , H04B10/506 , H04J14/06 , H04J14/04
摘要： Methods, systems, and devices for network communications to reduce optical beat interference (OBI) in upstream communications are described. For example, a fiber node may provide a seed source to injection lock upstream laser diodes. Therefore, upstream communications from each injection locked laser diode may primarily include the wavelength associated with each seed source. The seed sources may be unique to each end device and configured to minimize OBI. That is, the upstream laser diodes may be generic, but the collected seed source may enable upstream communications at varying wavelengths. The end device may provide upstream communications by externally modulating a signal generated by the injection locked laser diode.
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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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