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1. 发明申请

US20190245622A1 NETWORK COMMUNICATIONS SYSTEMS AND METHODS 审中-公开
公开(公告)号：US20190245622A1
公开(公告)日：2019-08-08
申请号：US16265755
申请日：2019-02-01
申请人： CABLE TELEVISION LABORATORIES, INC.
发明人： LUIS ALBERTO CAMPOS
IPC分类号： H04B10/50 , H04B10/63 , H04B10/532 , H04J14/04 , H04B10/64 , H04J14/06
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 narrow band 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 received seed source may enable upstream communications at varying wavelengths. The fiber node may provide each seed source by filtering (e.g., by a grating filter) a broadband light source.

2. 发明申请

US20180069638A1 Self-coherent robust spectrally efficient optical transmission systems 审中-公开
公开(公告)号：US20180069638A1
公开(公告)日：2018-03-08
申请号：US15676286
申请日：2017-08-14
申请人： Technion Research and Development Foundation LTD.
发明人： Moshe Nazarathy , Amos Agmon , Alex Tolmachev
IPC分类号： H04B10/61 , H04B10/64 , H04B10/63
CPC分类号： H04B10/6151 , H04B10/614 , H04B10/63 , H04B10/64
摘要： Coherent reconstruction of dual polarized data and pilot signals without local oscillator or laser.

3. 发明授权

US09841447B2 Apparatus enabling use of a reference diode to compare against a device under test in relative amplitude and phase measurements 有权
公开(公告)号：US09841447B2
公开(公告)日：2017-12-12
申请号：US14945395
申请日：2015-11-18
申请人： Tektronix, Inc.
发明人： Robert A. Marsland, Jr. , Steven A. Jacobs
IPC分类号： H04B10/00 , G01R25/00 , G01J1/44 , H04B10/63 , H04B10/073 , H04B10/61
CPC分类号： G01R25/00 , G01J1/44 , H04B10/0731 , H04B10/615 , H04B10/63
摘要： Embodiments of the invention include methods and devices for determining a phase angle offset between a phase angle of a local oscillator relative to a phase angle of a signal input of a Device Under Test (DUT). Some embodiments include a laser source and an optical phase adjustor, which may be embodied by a loop stretcher structured to controllably stretch a length of fiber optic cable, driven by a phase adjust driver. In other embodiments the phase angle offset information is conveyed to an oscilloscope for internal compensation.

4. 发明授权

US09709668B1 Reconfigurable photonic integrated circuit focal plane array 有权
公开(公告)号：US09709668B1
公开(公告)日：2017-07-18
申请号：US15072305
申请日：2016-03-16
申请人： Lockheed Martin Coherent Technologies, Inc.
发明人： Piotr Konrad Kondratko , Philip Gatt , John Glennon , Brian Carroll Redman , Paul J. M. Suni
IPC分类号： G01S7/481 , G01S17/02 , G01S7/499 , H04B10/63 , H04L1/00 , H04B10/61
CPC分类号： G01S7/4811 , G01J9/04 , G01S7/4917 , G01S7/499 , G01S17/02 , G01S17/08 , G01S17/89 , H04B10/61 , H04B10/63 , H04B10/64 , H04B10/66 , H04B10/70 , H04L1/0042
摘要： A reconfigurable photonic integrated circuit focal plane array (RPIC-FPA) includes detectors and photonic integrated circuit coupled to the detectors that are configured to mix a return signal beam with local oscillator (LO) beams to produce a combined beam and direct the combined beam to the detectors. The LO beams have reconfigurable optical properties enabled by the RTIC-FPA. The LO beams are individually addressed to switch the detectors between a direct detection mode and various coherent detection modes based on adjustments to the optical properties of the LO beams. In the coherent detection mode, the controller is configured to mix the return signal beam with the LO beam having adjusted optical properties to produce the combined beam, and, in the direct detection mode, the controller is configured to disable the LO beams based on adjustments to the optical properties and to direct the return signal beam to the detectors without mixing.

5. 发明授权

US09705599B2 Systems for improved spectral efficiency in multi-carrier communication systems 有权
公开(公告)号：US09705599B2
公开(公告)日：2017-07-11
申请号：US14813756
申请日：2015-07-30
申请人： Google Inc.
发明人： Vinayak Dangui , Bikash Koley , Vijay Vusirikala , Ralph Theodore Hofmeister
IPC分类号： H04B10/00 , H04B10/40 , H04B10/43 , H04B10/63 , H04J14/02
CPC分类号： H04B10/40 , H04B10/43 , H04B10/63 , H04J14/02 , H04J14/0279
摘要： This disclosure provides systems, methods, and apparatus for improving spectral efficiency of a communication system. The communication system can include a transmitter, a receiver and a communication link for communicating data between the transmitter and the receiver. The transmitter can employ a multi-carrier technique to transmit data to the receiver. The transmitter can generate a plurality of carrier signals using a receiver-side comb generator, one of which is sent to the transmitter as a pilot carrier signal combined with modulated carrier signals over an optical link. At the receiver the receiver-side comb generator uses the pilot carrier signal to generate a plurality of receiver-side carrier signals, which are used for detecting the modulated carrier signals. As the phase noise in the modulated carrier signals and the phase noise in the receiver-side carrier signals have the same characteristics, the phase noise is cancelled at the receiver, resulting in improved detection.

6. 发明授权

US09621270B2 System and methods for fiber and wireless integration 有权
公开(公告)号：US09621270B2
公开(公告)日：2017-04-11
申请号：US14495090
申请日：2014-09-24
申请人： ZTE CORPORATION
发明人： Jianjun Yu
IPC分类号： H04J14/06 , H04B10/63 , H04B10/2575 , H04L27/36 , H04L27/38 , H04L5/04
CPC分类号： H04B10/25752 , H04B10/63 , H04J14/06 , H04L5/04 , H04L27/365 , H04L27/3827
摘要： Embodiments of the present invention pertain to optical wireless architecture and, in particular, to novel optical architecture to provide fiber-optic and wireless communication systems, links, and access networks. Certain embodiments of the invention pertain to a novel method and apparatus to provide 109.6 Gb/s capacity over spans of 80-km SMF and 2×2 MIMO. Conversion of PM-QAM modulated wireless mm-wave signal to an optical signal as well as 80-km fiber transmission of the converted optical signal is also realized.

7. 发明授权

US09503186B2 Space division multiplexing apparatus including multi-core fiber and selfhomodyne detection method 有权
标题翻译：包括多芯光纤和自拍检测方法的空分复用装置
公开(公告)号：US09503186B2
公开(公告)日：2016-11-22
申请号：US14424031
申请日：2013-03-22
申请人： National Institute of Information and Communications Technology
发明人： Tetsuya Kawanishi , Yoshinari Awaji , Ben Puttnam , Atsushi Kanno
IPC分类号： H04B10/25 , H04J14/04 , H04B10/61 , G02B6/02 , G02B6/04 , H04B10/63 , H04J14/00 , H04J14/06
CPC分类号： H04B10/2504 , G02B6/02 , G02B6/02042 , G02B6/04 , H04B10/61 , H04B10/63 , H04J14/00 , H04J14/04 , H04J14/06
摘要： To provide a self-homodyne detection communication system capable of using a space-division multiplexing signal as a signal for communication. The present invention relates to a space-division multiplexing apparatus 12 including a multi-core fiber 11 having multiple cores. The space-division multiplexing apparatus 12 uses cores other than a core 13 for self-homodyne detection among the multiple cores included in the multi-core fiber 11 as cores 16 for communication. The space-division multiplexing apparatus is configured to include a pilot-tone guiding unit 14 and a self-homodyne detection unit 15.
摘要翻译：提供能够使用空分多路复用信号作为通信信号的自我零差检测通信系统。本发明涉及包括具有多个核的多芯光纤11的空分多路复用装置12。空分多路复用装置12使用包含在多芯光纤11中的多个核之外的用于芯片13的核心进行自我检测的核心，作为用于通信的核心16。空分多路复用装置被配置为包括导频音引导单元14和自拍零检测单元15。

8. 发明申请

US20160146869A1 APPARATUS ENABLING USE OF A REFERENCE DIODE TO COMPARE AGAINST A DEVICE UNDER TEST IN RELATIVE AMPLITUDE AND PHASE MEASUREMENTS 有权
标题翻译：使用参考二极管比较相对振幅和相位测量下的器件的装置
公开(公告)号：US20160146869A1
公开(公告)日：2016-05-26
申请号：US14945395
申请日：2015-11-18
申请人： Tektronix, Inc.
发明人： Robert A. Marsland, JR. , Steven A. Jacobs
IPC分类号： G01R25/00 , G01J1/44
CPC分类号： G01R25/00 , G01J1/44 , H04B10/0731 , H04B10/615 , H04B10/63
摘要： Embodiments of the invention include methods and devices for determining a phase angle offset between a phase angle of a local oscillator relative to a phase angle of a signal input of a Device Under Test (DUT). Some embodiments include a laser source and an optical phase adjustor, which may be embodied by a loop stretcher structured to controllably stretch a length of fiber optic cable, driven by a phase adjust driver. In other embodiments the phase angle offset information is conveyed to an oscilloscope for internal compensation.
摘要翻译：本发明的实施例包括用于确定本地振荡器相对于被测器件（DUT）的信号输入的相位角的相位角之间的相位角偏移的方法和装置。一些实施例包括激光源和光学相位调节器，该激光源和光学相位调节器可以由构造成可控地拉伸由相位调节驱动器驱动的一段光纤线缆的环形拉伸器来实现。在其他实施例中，相位角偏移信息被传送到示波器进行内部补偿。

9. 发明申请

US20160076941A1 Automatically Locked Homodyne Detection 有权
标题翻译：自动锁定零差检测
公开(公告)号：US20160076941A1
公开(公告)日：2016-03-17
申请号：US14856389
申请日：2015-09-16
申请人： University of Southern California
发明人： Mohammad Reza Chitgarha , Alan E. Willner , Amirhossein Mohajerin-Ariaei , Morteza Ziyadi , Salman Khaleghi
IPC分类号： G01J3/45
CPC分类号： G01J3/45 , G02F1/35 , G02F1/37 , G02F2001/3507 , G02F2001/3548 , H04B10/00 , H04B10/613 , H04B10/63
摘要： Systems and techniques relating to automatically-locked homodyne detection are described. A described system includes a first nonlinear element, a filter, and second nonlinear elements. The first nonlinear element can produce, based on an input signal and a first continuous wave (CW) signal, a first output signal that includes the input signal and a phase conjugate copy of the input signal. The filter can produce a filtered signal based on the first output signal and can be programmable to adjust an induced delay between the input signal and the phase conjugate signal. The second nonlinear elements can produce second output signals based on a second CW signal and differently weighted combinations of signal components within the filtered signal. The second output signals can include an in-phase output signal based on an in-phase version of the filtered signal and a quadrature output signal based on a quadrature version of the filtered signal.
摘要翻译：描述与自动锁定零差检测相关的系统和技术。所描述的系统包括第一非线性元件，滤波器和第二非线性元件。第一非线性元件可以基于输入信号和第一连续波（CW）信号产生包括输入信号的第一输出信号和输入信号的相位共轭拷贝。滤波器可以基于第一输出信号产生滤波信号，并且可以被编程以调整输入信号和相位共轭信号之间的感应延迟。第二非线性元件可以基于第二CW信号和滤波信号内的信号分量的不同加权组合产生第二输出信号。第二输出信号可以包括基于滤波信号的同相版本的同相输出信号和基于滤波信号的正交版本的正交输出信号。

10. 发明授权

US09014575B2 Sampling clock synchronizing apparatus, digital coherent receiving apparatus, and sampling clock synchronizing method 有权
标题翻译：采样时钟同步装置，数字相干接收装置和采样时钟同步方法
公开(公告)号：US09014575B2
公开(公告)日：2015-04-21
申请号：US13345008
申请日：2012-01-06
申请人： Hisao Nakashima , Takeshi Hoshida
发明人： Hisao Nakashima , Takeshi Hoshida
IPC分类号： H04B10/06 , H04L7/027 , H04L7/033
CPC分类号： H04L7/027 , H04B10/616 , H04B10/6164 , H04B10/63 , H04L7/0337
摘要： In a sampling clock synchronizing apparatus, an A/D converter converts an analog signal to a digital signal based on a sampling clock, and a processor compensates a band limitation due to spectral narrowing by filter characteristics of characteristics opposite to those of the spectral narrowing with respect to a signal produced from the A/D converter subjected to the spectral narrowing, and detects a phase shift in the sampling clock based on a signal after the compensation of the spectral narrowing and synchronizes sampling timing.
摘要翻译：在采样时钟同步装置中，A / D转换器基于采样时钟将模拟信号转换为数字信号，并且处理器通过与频谱变窄的特性相反的特性的滤波特性来补偿由于频谱变窄引起的频带限制，相对于经受频谱变窄的A / D转换器产生的信号，并且基于在频谱变窄的补偿之后的信号来检测采样时钟中的相移并同步采样定时。

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