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1. 发明公开

US20230342649A1 SYSTEMS AND METHODS FOR REAL-TIME POLARIZATION DRIFT COMPENSATION IN OPTICAL FIBER CHANNELS USED FOR QUANTUM COMMUNICATIONS 审中-公开
公开(公告)号：US20230342649A1
公开(公告)日：2023-10-26
申请号：US18024715
申请日：2021-09-03
申请人： Qunnect,Inc.
发明人： Mael Flament , Mehdi Namazi , Rourke Sekelsky , Gabriel Bello Portmann
IPC分类号： G06N10/40 , G02F1/01 , H04B10/532 , H04B10/079 , H04B10/2507
CPC分类号： G06N10/40 , G02F1/0136 , H04B10/532 , H04B10/0795 , H04B10/2572
摘要： Systems and methods for performing polarization compensation in optical fiber-based quantum telecommunications systems are provided. The system includes a polarization modulator optically coupled to a photon source by an optical fiber and at least one controller coupled to the polarization modulator. The at least one controller is configured to determine, using a machine learning model and/or a lookup table, a feedback parameter based on one or more measurements of a polarization of probe photons at a location along the optical fiber, the probe photons being generated by the photon source; and using the feedback parameter, to change a setting of the polarization modulator to change a polarization of quantum data photons propagating in the optical fiber subsequent to the probe photons.

2. 发明授权

US10038504B2 Optical network span sensing 有权
公开(公告)号：US10038504B2
公开(公告)日：2018-07-31
申请号：US14982111
申请日：2015-12-29
申请人： Alcatel-Lucent USA Inc.
发明人： Peter J Winzer , John Edward Simsarian
IPC分类号： H04B10/25 , H04B10/077 , H04B10/80 , H04B10/2507
CPC分类号： H04B10/2572 , H04B10/077 , H04B10/0773 , H04B10/07951 , H04B10/802
摘要： An apparatus includes a polarization beam splitter (PBS) and an optical detector. The PBS is configured to receive a polarized optical signal transported via an optical communication path of an optical network. The detector is configured to receive from the PBS a first polarization component of the optical signal, and to produce a first electrical measure of the first polarization component. A processor is configured to determine a dynamic metric of the optical communication path based at least on the first electrical measure. Some embodiments also include a second detector configured to receive from the PBS a second polarization component of the optical signal. The second detector produces a second electrical measure of the second polarization component, and the processor is configured to determine the dynamic metric based on both the first and second electrical measures.

3. 发明申请

US20180062759A1 METHODS FOR COMPENSATION OF CROSS-POLARIZATION MODULATION (XPOLM) IMPAIRMENTS IN COHERENT OPTICAL COMMUNICATIONS 审中-公开
公开(公告)号：US20180062759A1
公开(公告)日：2018-03-01
申请号：US15244071
申请日：2016-08-23
申请人： Mitsubishi Electric Research Laboratories, Inc.
发明人： Milutin Pajovic , Kieran Parsons , David Millar , Toshiaki Koike-Akino , Keisuke Kojima
IPC分类号： H04B10/61 , H04B3/32 , H04B10/079
CPC分类号： H04B10/6162 , H04B3/32 , H04B10/0795 , H04B10/2572 , H04B10/614 , H04B10/6166 , H04B2210/006
摘要： Methods and systems for decoding symbols transmitted over an optical channel having a cross-polarization modulation (XPolM) impairment, wherein an optical signal is polarized to encode the symbols on an x-polarization and an y-polarization before transmitted. The method including receiving the optical signal transmitted over the optical channel. Sampling the optical signal to produce a sequence of digital samples, wherein each digital sample includes a measurement of each polarization of the optical signal at an instance of time. Selecting a subset of the sequence of digital samples that includes a digital sample and neighboring digital samples on the sequence. Repeating the selecting and the determining for each digital sample remaining in the sequence of digital samples to produce a sequence of cross-talk coefficients; and decoding some of the symbols from the sequence of digital samples using cross-talk models with corresponding cross-talk coefficients, wherein method steps are performed using a processor.

4. 发明授权

US09806815B2 Optical source, communications network optical apparatus and communications network base station 有权
公开(公告)号：US09806815B2
公开(公告)日：2017-10-31
申请号：US15311913
申请日：2014-05-23
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Luca Giorgi , Antonio D'Errico , Gianfranco Sfameni , Francesco Testa
IPC分类号： H04B10/00 , H04B10/2507 , H04B10/532 , H04J14/00 , H04W88/08
CPC分类号： H04B10/2572 , H01S5/50 , H04B10/50 , H04B10/532 , H04W88/08
摘要： There is provided an optical source. The optical source comprises a reflective optical amplifier configured to generate an optical signal, the optical signal comprising an amplified spontaneous light emission having a plurality of light modes each having a respective wavelength. The optical source further comprises a reflective mirror, spaced from the reflective optical amplifier, and arranged to receive the optical signal and to rotate a polarization of each light mode in the received optical signal, to form a further optical signal. The optical source further comprises an optical power splitter arranged to receive the further optical signal and to split the further optical signal into a first optical signal which is directed to the reflective optical amplifier for amplification thereby, and a second optical signal. The optical source further comprises an output arranged to output the second optical signal. There is also provided a communications network optical apparatus and a communications network base station.

5. 发明授权

US09768880B2 Method and system for nonlinear interference mitigation 有权
公开(公告)号：US09768880B2
公开(公告)日：2017-09-19
申请号：US14717762
申请日：2015-05-20
申请人： Qunbi Zhuge , Michael Andrew Reimer , Shahab Oveis Gharan , Maurice Stephen O'Sullivan
发明人： Qunbi Zhuge , Michael Andrew Reimer , Shahab Oveis Gharan , Maurice Stephen O'Sullivan
IPC分类号： H04B10/58 , H04J14/02 , H04B10/2507 , H04B10/2557 , H04B10/2563 , H04B10/564
CPC分类号： H04B10/58 , H04B10/2557 , H04B10/2563 , H04B10/2572 , H04B10/564 , H04B2210/254 , H04J14/0221
摘要： A method for preventing nonlinear interference in an optical communication system. The method may include selecting an optical signal of a first optical channel. The method may include determining an estimate of inter-channel nonlinear interference to the optical signal of the first optical channel. The inter-channel nonlinear interference may be generated by one or more optical signals transmitted over a second optical channel in the optical communication system. The method may include determining one or more linear filters based on the estimate of the inter-channel nonlinear interference. The method may include pre-distorting an optical signal for transmission over the second optical channel using the one or more linear filters. The pre-distorted optical signal may be configured for reducing the inter-channel nonlinear interference to the first optical signal of the first optical channel. The method may include transmitting the pre-distorted optical signal over the second optical channel through an optical transmission medium.

6. 发明申请

US20170237519A1 EXTERNAL CAVITY FP LASER 有权
公开(公告)号：US20170237519A1
公开(公告)日：2017-08-17
申请号：US15583526
申请日：2017-05-01
申请人： Oplink Communications, LLC
发明人： Zuon-Min CHUANG , Rang-Chen Yu , Domenico DiMOLA , Sung-Ping Huang
IPC分类号： H04J14/02 , H01S5/14 , H01S3/10 , H01S3/106 , H04B10/50 , H01S5/00 , H04Q11/00 , H04J14/06 , H04B10/2507 , H01S3/08 , H01S5/065
CPC分类号： H04J14/0246 , H01S3/08027 , H01S3/08054 , H01S3/10061 , H01S3/106 , H01S3/1062 , H01S5/0064 , H01S5/0078 , H01S5/02438 , H01S5/0656 , H01S5/1021 , H01S5/141 , H01S5/143 , H01S5/146 , H01S2301/14 , H01S2301/163 , H04B10/2572 , H04B10/501 , H04B10/505 , H04B10/572 , H04J14/0247 , H04J14/025 , H04J14/0252 , H04J14/0282 , H04J14/06 , H04Q11/0067 , H04Q2011/0009 , H04Q2011/0032 , H04Q2011/0035
摘要： Methods, systems, and apparatus, for an external cavity FP laser. In one aspect, an apparatus is provided that includes a FP laser diode; a Faraday rotator (FR) coupled to receive an optical output of the FP laser diode and that rotates a polarization of the optical output; an optical fiber coupled at a first end to receive the output of the FR; a WDM filter coupled to a second end of the optical fiber to receive the optical signal from the optical fiber; and a FRM coupled directly or indirectly to an output of the WDM filter, wherein an optical output of the WDM filter is partially reflected by the FRM such that the polarization of a reflected beam is rotated, and wherein the reflected optical signal then passes through the FR with its polarization being rotated by the FR before it is injected back into the FP laser diode.

7. 发明授权

US09590731B2 Signal equalizer in a coherent optical receiver 有权
标题翻译：相干光接收机中的信号均衡器
公开(公告)号：US09590731B2
公开(公告)日：2017-03-07
申请号：US14810135
申请日：2015-07-27
申请人： Ciena Corporation
发明人： Kim B. Roberts , Han Sun
IPC分类号： H04B10/00 , H04B10/2569 , H04B10/67 , H04B10/69 , H04B10/2507 , H04B10/532
CPC分类号： H04B10/6971 , H04B10/2569 , H04B10/2572 , H04B10/532 , H04B10/677
摘要： A signal equalizer for compensating impairments of an optical signal received through a link of a high speed optical communications network. At least one set of compensation vectors are computed for compensating at least two distinct types of impairments. A frequency domain processor is coupled to receive respective raw multi-bit in-phase (I) and quadrature (Q) sample streams of each received polarization of the optical signal. The frequency domain processor operates to digitally process the multi-bit sample streams, using the compensation vectors, to generate multi-bit estimates of symbols modulated onto each transmitted polarization of the optical signal. The frequency domain processor exhibits respective different responses to each one of the at least two distinct types of impairments.
摘要翻译：一种信号均衡器，用于补偿通过高速光通信网络的链路接收的光信号的损伤。计算至少一组补偿向量以补偿至少两种不同类型的损伤。频域处理器被耦合以接收光信号的每个接收极化的相应的原始多位同相（I）和正交（Q）采样流。频域处理器操作以使用补偿矢量对多位采样流进行数字处理，以产生调制到光信号的每个透射偏振上的符号的多位估计。所述频域处理器对所述至少两种不同类型的损伤中的每一种表现出相应的不同响应。

8. 发明申请

US20170033884A1 OPTICAL MODULE AND OPTICAL TRANSMITTER USING THE SAME 有权
标题翻译：使用该光学模块和光学发射器
公开(公告)号：US20170033884A1
公开(公告)日：2017-02-02
申请号：US15134622
申请日：2016-04-21
申请人： Fujitsu Optical Components Limited
发明人： Masaki SUGIYAMA , Takehito Tanaka
IPC分类号： H04J14/06 , H04B10/532
CPC分类号： H04J14/06 , H04B10/2572 , H04B10/532
摘要： An optical module has an optical modulator configured to perform phase modulation on each of divided light components of an input light and output at least two phase-modulated signal lights, a semiconductor optical amplifier configured to amplify the phased-modulated signal lights in a same polarization mode, and a polarization multiplexer configured to convert the amplified signal lights into two orthogonally polarized signal lights and multiplex the orthogonally polarized signal lights.
摘要翻译：一种光学模块，具有：光调制器，被配置为对输入光的分光分量进行相位调制，并输出至少两个相位调制信号光;半导体光放大器，被配置为放大相位偏振的相位调制信号光模式，以及偏振复用器，被配置为将放大的信号光转换成两个正交偏振信号光并将正交偏振信号光多路复用。

9. 发明申请

US20160261352A1 Polarization State Aligner (PSA) 有权
标题翻译：极化状态对齐器（PSA）
公开(公告)号：US20160261352A1
公开(公告)日：2016-09-08
申请号：US15057379
申请日：2016-03-01
申请人： Futurewei Technologies, Inc.
发明人： Yangjing Wen , Fei Zhu , Yu Sheng Bai
IPC分类号： H04B10/61 , H04B10/532
CPC分类号： H04B10/614 , G02B6/272 , H04B10/2572 , H04B10/5053 , H04B10/532 , H04B10/6151
摘要： A system comprises: a polarization state aligner (PSA) comprising: an input port; a first polarization beam splitter (PBS) coupled to the input port; a first phase shifter (PS) coupled to the first PBS; a first polarization rotator (PR) coupled to the first PBS; a first beam splitter (BS) coupled to the first PS and the first PR; a first output port coupled to the first BS; and a second output port coupled to the first BS.
摘要翻译：一种系统包括：偏振状态对准器（PSA），包括：输入端口; 耦合到输入端口的第一偏振分束器（PBS）; 耦合到第一PBS的第一移相器（PS）; 耦合到第一PBS的第一偏振旋转器（PR）; 耦合到第一PS和第一PR的第一分束器（BS）; 耦合到第一BS的第一输出端口; 以及耦合到第一BS的第二输出端口。

10. 发明申请

US20160028481A1 SIGNAL EQUALIZER IN A COHERENT OPTICAL RECEIVER 有权
公开(公告)号：US20160028481A1
公开(公告)日：2016-01-28
申请号：US14810135
申请日：2015-07-27
申请人： Kim B. ROBERTS , Han SUN
发明人： Kim B. ROBERTS , Han SUN
IPC分类号： H04B10/2569 , H04B10/532 , H04B10/69
CPC分类号： H04B10/6971 , H04B10/2569 , H04B10/2572 , H04B10/532 , H04B10/677
摘要： A signal equalizer for compensating impairments of an optical signal received through a link of a high speed optical communications network. At least one set of compensation vectors are computed for compensating at least two distinct types of impairments. A frequency domain processor is coupled to receive respective raw multi-bit in-phase (I) and quadrature (Q) sample streams of each received polarization of the optical signal. The frequency domain processor operates to digitally process the multi-bit sample streams, using the compensation vectors, to generate multi-bit estimates of symbols modulated onto each transmitted polarization of the optical signal. The frequency domain processor exhibits respective different responses to each one of the at least two distinct types of impairments.

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