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91. 发明授权

US4759080A Coherent optical communication system with FSK heterodyne or homodyne detection and little influence by distortion of a modulated optical signal 失效
标题翻译：具有FSK外差或零差检测的相干光通信系统，并且调制光信号失真几乎没有影响
公开(公告)号：US4759080A
公开(公告)日：1988-07-19
申请号：US671364
申请日：1984-11-14
申请人： Katsumi Emura , Minoru Shikada
发明人： Katsumi Emura , Minoru Shikada
IPC分类号： H04B10/60 , H04B10/63 , H04B10/64 , H04L27/14 , H04B9/00
CPC分类号： H04B10/60 , H04B10/63 , H04B10/64 , H04L27/14
摘要： A laser (21) is frequency modulated by an electrical modulating signal of a bit rate into a modulated signal of a first and a second modulated frequency. A combination of an optical mixer (27) and an optical detector (31) carries out optical heterodyne or homodyne detection on the modulated optical signal to produce a detected signal having a first and a second frequency component. A component separator (32) is for selecting only one of the components from the detected signal. A detector (33) detects the selected component to produce a demodulated electrical signal representative of the modulating signal. The laser is preferably a semiconductor laser. More preferably, the semiconductor laser is frequency modulated after the modulating signal is converted to a current of an mBnB code sequence. When the bit rate is below and above about 10 Mbit/second, either the modulating signal or the mBnB code sequence current is preferably used in frequency modulating the semiconductor laser after caused to pass through a high-pass and a low-pass filter, respectively.
摘要翻译：激光器（21）由比特率的电调制信号进行频率调制成为第一和第二调制频率的调制信号。光学混合器（27）和光学检测器（31）的组合对调制的光信号执行光学外差或零差检测，以产生具有第一和第二频率分量的检测信号。分量分离器（32）用于从检测到的信号中仅选择一个分量。检测器（33）检测所选择的分量以产生表示调制信号的解调电信号。激光器优选为半导体激光器。更优选地，在调制信号被转换为mBnB码序列的电流之后，半导体激光器被调频。当比特率低于大于10Mbit /秒时，调制信号或mBnB码序列电流优选地用于在分别通过高通滤波器和低通滤波器之后对半导体激光器进行频率调制。

92. 发明授权

US12149280B2 Dynamic error quantizer tuning systems and methods 有权
公开(公告)号：US12149280B2
公开(公告)日：2024-11-19
申请号：US17580607
申请日：2022-01-20
申请人： Maxim Integrated Products, Inc.
发明人： Charles Razzell
IPC分类号： H04B10/035 , H04B10/077 , H04B10/63
CPC分类号： H04B10/035 , H04B10/077 , H04B10/63
摘要： Dynamic error-quantizer tuning systems and methods prevent misconvergence to local minima by using a dynamic quantizer circuit that controls reference voltages of three or more comparators that are independently adjusted to modify the transfer function of the dynamic quantizer circuit. A weighted sum of the comparator outputs is subtracted from the input to form an error signal in a control loop. The ratio of the reference voltages is chosen to reduce or eliminate local minima during a convergence of the control loop and is set to values that minimize a mean squared error signal with respect to discrete modulation states of the input after the convergence of the control loop is complete.

93. 发明公开

US20240048245A1 FIBER CUT/FAULT LOCALIZATION USING DIGITAL SUBCARRIERS 审中-公开
公开(公告)号：US20240048245A1
公开(公告)日：2024-02-08
申请号：US17817234
申请日：2022-08-03
申请人： Infinera Corp.
发明人： Magnus Olson , Amir Rashidinejad , Jia Ge
IPC分类号： H04B10/63 , H04B10/40 , H04W72/04
CPC分类号： H04B10/63 , H04B10/40 , H04W72/0453
摘要： Disclosed herein are coherent transceivers and methods of using the same. One exemplary coherent transceiver may be provided with a coherent transmitter operable to transmit a first optical signal and a coherent receiver comprising a processor executing processor-executable code that when executed causes the processor to receive a second optical signal, the second optical signal being a reflection of the first optical signal, analyze the second optical signal to determine a first parameter indicative of a chromatic dispersion of the second optical signal, and determine a second parameter based on the first parameter. The second parameter may be indicative of a distance travelled by the first optical signal and the second optical signal through one or more fiber optic link having a known first location.

94. 发明公开

US20230361879A1 COMMUNICATION SYSTEMS AND METHODS 审中-公开
公开(公告)号：US20230361879A1
公开(公告)日：2023-11-09
申请号：US18092372
申请日：2023-01-02
申请人： Junwen Zhang , Zhensheng Jia , Luis Alberto Campos , Haipeng Zhang , Mu Xu , Jing Wang , Curtis Dean Knittle , Chuang Zhou
发明人： Junwen Zhang , Zhensheng Jia , Luis Alberto Campos , Haipeng Zhang , Mu Xu , Jing Wang , Curtis Dean Knittle , Chuang Zhou
IPC分类号： H04B10/50 , H04J14/06 , H04J14/04 , H04B10/63 , H04B10/64 , H04B10/532
CPC分类号： H04B10/504 , H04J14/06 , H04J14/04 , H04B10/63 , H04B10/506 , H04B10/505 , H04B10/502 , H04B10/64 , H04B10/532
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.

95. 发明授权

US11736199B1 Systems and methods for phase compensation 有权
公开(公告)号：US11736199B1
公开(公告)日：2023-08-22
申请号：US17339740
申请日：2021-06-04
申请人： CABLE TELEVISION LABORATORIES, INC.
发明人： Junwen Zhang , Mu Xu , Haipeng Zhang , Zhensheng Jia , Luis Alberto Campos
IPC分类号： H04B10/50 , H04B10/61 , H04B10/63
CPC分类号： H04B10/504 , H04B10/50572 , H04B10/6164 , H04B10/6165 , H04B10/63
摘要： A method for phase compensation in an optical communication network includes (1) modifying a modulated signal according to one or more correction factors to generate a compensated signal, to compensate for phase rotation, (2) modulating a magnitude of an optical signal in response to a magnitude of the compensated signal, and (3) modulating a phase of the optical signal, after modulating the magnitude of the optical signal, in response to a phase of the compensated signal.

96. 发明公开

US20230246716A1 FIBER COMMUNICATION SYSTEMS AND METHODS 审中-公开
公开(公告)号：US20230246716A1
公开(公告)日：2023-08-03
申请号：US18132263
申请日：2023-04-07
申请人： CABLE TELEVISION LABORATORIES, INC
发明人： Zhensheng Jia , Luis Alberto Campos , Curtis Dean Knittle
IPC分类号： H04B10/50 , H04B10/64 , H04B10/532 , H04B10/63 , H04J14/04 , H04J14/06
CPC分类号： H04B10/504 , H04B10/506 , H04B10/64 , H04B10/502 , H04B10/505 , H04B10/532 , H04B10/63 , 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.

97. 发明公开

US20230188220A1 Apparatus and Methods for Mitigating Multipath Interference in Fiber Transmission System 审中-公开
公开(公告)号：US20230188220A1
公开(公告)日：2023-06-15
申请号：US18153217
申请日：2023-01-11
申请人： Huawei Technologies Co., Ltd.
发明人： Yangjing Wen , Yan Cui , YuSheng Bai
IPC分类号： H04B10/69 , H04B10/2507 , H04B10/63 , H04B10/61
CPC分类号： H04B10/6972 , H04B10/25073 , H04B10/63 , H04B10/6166
摘要： An optical receiver that includes an input port configured to receive intensity modulated optical signal with multipath interference (MPI); a detector configured to convert the intensity modulated optical signal with multipath interference to an electrical signal; a high pass filter (HPF) configured to filter the electrical signal and suppress carrier-carrier beat noise induced by the MPI to produce a filtered electrical signal; and an output port configured to transmit the filtered electrical signal.

98. 发明申请

US20230121555A1 SYSTEM AND METHOD FOR OPTICAL COMMUNICATION 有权
公开(公告)号：US20230121555A1
公开(公告)日：2023-04-20
申请号：US18047500
申请日：2022-10-18
申请人： Luminous Computing, Inc.
发明人： Thomas W. BAEHR-JONES , Hari SHANKAR , Florian BOHN
IPC分类号： H04B10/63 , H04B10/50
摘要： Mixing between I and Q components in coherent homodyne optical signals can occur due to phase shifts, e.g. relative to the local oscillator, relative to the other signal components. In some examples, the phase shifts can arise due to thermal expansion of the optical waveguides and/or can include polarization mixing. A descrambler functions to correct for mixing between multiple signal components. The descrambler may be configured to at least partially correct for a phase difference between a first plurality of modulated optical data signals and a first local oscillator reference signal; and a controller may be configured for determining a first correction parameter for at least partially correcting for the phase difference, and for transmitting the first correction parameter to the descrambler. The controller may be configured for determining the first correction parameter from a first pilot signal transmitted with the first plurality of modulated optical data signals.

99. 发明授权

US11569916B2 Coherent detection implementing apparatus, system and method 有权
公开(公告)号：US11569916B2
公开(公告)日：2023-01-31
申请号：US17271915
申请日：2019-08-27
申请人： ZTE Corporation
发明人： Zhijuan Tu , Junwen Zhang , Xingang Huang , Mingsheng Li
IPC分类号： H04B10/40 , H04B10/61 , H04B10/516 , H04B10/572 , H04B10/63 , H04B10/50 , H04B10/2587 , H04B10/64
摘要： Provided is a coherent detection implementing apparatus, system and method. The apparatus includes: a first transceiver unit, configured to send an optical signal in a first direction to a second device, wherein the optical signal in the first direction includes a direct current optical signal with a first wavelength and a modulated optical signal with a second wavelength; and configured to receive an optical signal in a second direction from the second device; and a first coherent receiver, connected with the first transceiver unit, and configured to take a part of the direct current optical signal with the first wavelength in the optical signal in the first direction as a Local Oscillator (LO) light for coherent reception, perform coherent frequency mixing between the LO light and the optical signal in the second direction, and demodulate the optical signal in the second direction.

100. 发明申请

US20220390680A1 OPTICAL COMMUNICATION DEVICE 有权
公开(公告)号：US20220390680A1
公开(公告)日：2022-12-08
申请号：US17886540
申请日：2022-08-12
申请人： FUJIFILM Corporation
发明人： Yukito SAITOH , Katsumi SASATA , Hiroshi SATO
IPC分类号： G02B6/32 , H04B10/63 , G02B5/30 , G02B6/27 , G02B6/293 , G02B5/18 , G02B6/42
摘要： Provided is an optical communication device, such as a wavelength locker, a wavelength demultiplexer, an optical coupling system, and an optical switching system, using a small-sized lens element. An optical communication device includes, as a lens element, a liquid crystal diffractive lens element having an optically anisotropic layer that is formed using a composition containing a liquid crystal compound, and has a liquid crystal alignment pattern in which an orientation of an optical axis of the liquid crystal compound changes while continuously rotating toward one direction, in a radial shape from an inside toward an outside, and in the liquid crystal alignment pattern, in a case where a length over which the orientation of the optical axis rotates by 180° in one direction in which the optical axis changes is a single period, a length of the single period gradually decreases from the inside toward the outside.

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