公开(公告)号：US20190238250A1

公开(公告)日：2019-08-01

申请号：US16225593

申请日：2018-12-19

申请人： FUJITSU LIMITED

发明人： KAZUYUKI TAJIMA ,  Yutaka Takita ,  MASATAKE MIYABE

IPC分类号： H04J14/02 ,  H04B10/572 ,  H04B10/61

CPC分类号： H04J14/02 ,  H04B10/572 ,  H04B10/61

摘要： An optical transmission device that is provided at a first site includes: an optical transmitter that transmits a first optical signal that includes first ID information to a second site using a first wavelength; and an optical receiver that receives a second optical signal that includes second ID information and that is transmitted using the first wavelength from the second site. When the first ID information matches the second ID information, the optical transmitter transmits a wavelength report that indicates a second wavelength to the second site using the first wavelength. When the optical receiver receives a completion report that indicates the wavelength report has been received at the second site, the optical transmitter transmits an optical signal to the second site using the second wavelength, and the optical receiver ceases to receive an optical signal of the first wavelength from the second site.

公开(公告)号：US20190237934A1

公开(公告)日：2019-08-01

申请号：US16243107

申请日：2019-01-09

申请人： Oclaro Japan, Inc.

发明人： Koichiro ADACHI ,  Yasunobu MATSUOKA

IPC分类号： H01S5/042 ,  H01S5/12 ,  H01S5/026 ,  H04B10/50

CPC分类号： H01S5/042 ,  G02B6/4246 ,  G02B6/4281 ,  H01S5/02236 ,  H01S5/026 ,  H01S5/12 ,  H04B10/505 ,  H04B10/61

摘要： A modulator integrated laser has a laser portion for emitting light and a modulation portion for modulating the light by an electric field absorption effect. The modulator integrated laser has a semiconductor substrate of a conductivity type in which the laser portion and the modulation portion are integrated. An impedance element with inductance and capacitance connected in parallel. The impedance element has a self-resonant characteristic exhibiting the highest impedance at a self-resonant frequency. The laser portion has first and second electrodes for a direct current voltage to be applied therebetween. The modulation portion has third and fourth electrodes for an alternate current voltage to be applied therebetween. The second electrode and the fourth electrode are electrically connected to each other through the semiconductor substrate. The impedance element is connected in series to the first electrode to minimize a flow of an alternate current.

公开(公告)号：US20190181977A1

公开(公告)日：2019-06-13

申请号：US16266626

申请日：2019-02-04

申请人： Kim B. ROBERTS ,  Amir K. KHANDANI

发明人： Kim B. ROBERTS ,  Amir K. KHANDANI

IPC分类号： H04L1/00 ,  H04B10/61 ,  H03M13/29 ,  H03M13/37

CPC分类号： H04L1/0041 ,  H03M13/2906 ,  H03M13/373 ,  H04B10/50 ,  H04B10/61 ,  H04L1/0057 ,  H04L1/0065

摘要： A super-frame for transmission in an optical communications system comprises two or more data frames and a parity frame. All frames in the super-frame have been encoded in accordance with a first Forward Error Correction (FEC) scheme. The parity frame is computed over the two or more data frames (prior to or concurrently with or after encoding via the first FEC scheme) according to a second FEC scheme. At a receiver, the super-frame is decoded in accordance with the first FEC scheme to generate a set of FEC decoded frames in which residual errors are clustered, that is, are non-Poisson. The second FEC scheme, which is particularly suited or designed to correct the clustered non-Poisson residual errors, is used to correct the residual errors.

公开(公告)号：US20190074909A1

公开(公告)日：2019-03-07

申请号：US16072420

申请日：2017-04-13

申请人： NTT ELECTRONICS CORPORATION ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Etsushi YAMAZAKI ,  Hiroyukl NOUCHI ,  Yasuharu ONUMA ,  Tomohiro TAKAMUKU ,  Katsuichi OYAMA ,  Kazuhito TAKEI ,  Masahito TOMIZAWA ,  Yoshiaki KISAKA ,  Mltsuteru YOSHIDA ,  Masanori NAKAMURA

IPC分类号： H04B10/61

CPC分类号： H04B10/6164 ,  H04B10/61 ,  H04B10/615 ,  H04B10/6165 ,  H04L27/3836 ,  H04L2027/0024

摘要： A symbol phase difference compensating portion (6) calculates a first phase difference which is a phase difference between a known pattern extracted from a received signal and a true value of the known pattern and performs phase compensation for the received signal based on the first phase difference. A tentative determination portion (12) tentatively determines an output signal of the symbol phase difference compensating portion (6) to acquire an estimated value of a phase. A first phase difference acquiring portion (13) acquires a second phase difference which is a phase difference between a phase of the output signal and the estimated value of the phase acquired by the tentative determination portion (12). A first phase difference compensating portion (14) performs phase compensation for the output signal based on the second phase difference.

公开(公告)号：US20180348428A1

公开(公告)日：2018-12-06

申请号：US16001581

申请日：2018-06-06

申请人： SiFotonics Technologies Co., Ltd.

发明人： Tuo Shi ,  Tzung-I Su ,  Yongbo Shao ,  Dong Pan

IPC分类号： G02B6/12 ,  G02B6/27 ,  G02B6/30 ,  G02B6/42

CPC分类号： G02B6/12004 ,  G02B6/2706 ,  G02B6/30 ,  G02B6/4275 ,  G02B2006/12061 ,  G02B2006/12123 ,  H01L27/0248 ,  H04B10/61

摘要： Various embodiments of a photonic integrated circuit (PIC) are described herein. A PIC, functioning as a coherent receiver, may include optical components such as an optical coupler, a directional coupler, a beam splitter, a polarizing beam rotator-splitter, a variable optical attenuator, a monitor photodiode, 90-degree hybrid mixer, and a waveguide photodiode. The PIC may also include electrical components such as an electrode, a capacitor, a resistor and a Zener diode.

公开(公告)号：US20180323904A1

公开(公告)日：2018-11-08

申请号：US15773035

申请日：2016-11-01

申请人： NEC CORPORATION

发明人： Kohei HOSOKAWA ,  Toshiharu ITO ,  Manabu ARIKAWA ,  Seigo TAKAHASHI ,  Takashi ISHIKAWA ,  Yoshimasa ONO

IPC分类号： H04L1/00 ,  H04L27/22 ,  H04B10/61 ,  H04B10/118 ,  H04L27/00

CPC分类号： H04L1/0057 ,  H04B10/118 ,  H04B10/61 ,  H04L27/0014 ,  H04L27/22 ,  H04L2027/0057

摘要： An appropriate synthesized signal cannot be obtained by only correcting relative phase errors of a plurality of received signals; therefore, a received signal processor according to an exemplary aspect of the present invention includes a plurality of signal-to-noise ratio estimation means for estimating respective signal-to-noise ratios of a plurality of digital signal sequences in which relative phase errors of a plurality of received signal sequences having been corrected; a plurality of temporary decision means for performing symbol decisions of the plurality of digital signal sequences and outputting symbol signal sequences; symbol-map-rotation determination means for determining respective phase rotation amounts of the plurality of digital signal sequences from the plurality of symbol signal sequences and the respective signal-to-noise ratios of the plurality of digital signal sequences; and a plurality of phase rotation means for rotating phases of the plurality of digital signal sequences respectively based on the phase rotation amounts.

公开(公告)号：US20180292607A1

公开(公告)日：2018-10-11

申请号：US15483084

申请日：2017-04-10

申请人： Alcatel-Lucent USA Inc. ,  Alcatel-Lucent Bell Labs France

发明人： Po Dong ,  Gabriel Charlet

IPC分类号： G02B6/12 ,  G02B6/126

CPC分类号： G02B6/12004 ,  G02B6/12002 ,  G02B6/126 ,  G02B6/4246 ,  G02B6/428 ,  G02B6/43 ,  G02B2006/12121 ,  G02B2006/12123 ,  G02B2006/12142 ,  H04B10/503 ,  H04B10/5161 ,  H04B10/532 ,  H04B10/54 ,  H04B10/61 ,  H04B10/66 ,  H04J14/06

摘要： A modular optical device having a set of optoelectronic modules that enables the device to operate, e.g., as a WDM or multichannel transceiver. In an example embodiment, the set of optoelectronic modules includes a laser module, a modulator module, and an optical-to-electrical converter module, all mounted on the same circuit board and optically and electrically connected for the intended application. Each of the optoelectronic modules comprises a respective stack of integrated circuits, at least one of which is a photonic integrated circuit (PIC). Some of the PICs may be configurable for different applications, with the configuration setup being carried out using electrical control signals and/or optical connections of the PICs. The modular structure of the device enables the manufacturer to provide customized solutions to different customers according to their respective specifications while using the same device architecture and/or to interchangeably use parts obtained from different suppliers to engineer those solutions.

公开(公告)号：US20180183520A1

公开(公告)日：2018-06-28

申请号：US15860261

申请日：2018-01-02

申请人： AT&T Intellectual Property I, L.P.

发明人： Xiang Zhou

IPC分类号： H04B10/2513 ,  H04L25/03 ,  H04B10/61 ,  H04B10/2575 ,  H04B10/516

CPC分类号： H04B10/2513 ,  H04B10/2575 ,  H04B10/516 ,  H04B10/61 ,  H04B10/6164 ,  H04B10/6165 ,  H04L25/03 ,  H04L25/0305

摘要： A method and system for simultaneous mitigation of optical impairment from both equalizer-phase noise interaction (EPNI) and fiber nonlinear effects (FNE) is disclosed. In one embodiment, the method is directed to simultaneous mitigation of optical impairment from both equalizer-phase noise interaction (EPNI) and fiber nonlinear effects (FNE) using a fast-adaptive multi-tap digital filter.

公开(公告)号：US20180109315A1

公开(公告)日：2018-04-19

申请号：US15296661

申请日：2016-10-18

申请人： Fujitsu Limited

发明人： Martin Bouda

IPC分类号： H04B10/079 ,  H04B10/61

CPC分类号： H04B10/07953 ,  H04B10/61 ,  H04B10/69 ,  H04L1/0045

摘要： Methods and systems are provided for monitoring a network link in an optical transport network. The method includes injecting a first level of added noise to the data stream at the receiver for a first period. The method further includes calculating a first bit error rate (BER) for the first period. The method also includes injecting a second level of added noise to the data stream at the receiver for a second period, the second level of added noise different than the first level of added noise, wherein the first and second periods do not overlap. The method further includes calculating a second BER for the second period. In addition, the method includes determining a characteristic of the network link based on the first BER and the second BER.

公开(公告)号：US09929801B2

公开(公告)日：2018-03-27

申请号：US15112044

申请日：2014-04-01

申请人： ZHONGXING MICROELECTRONICS TECHNOLOGY CO. LTD

发明人： Yangzhong Yao ,  Yunpeng Li ,  Yi Cai ,  Weiqin Zhou ,  Zhensheng Jia

IPC分类号： H04B10/08 ,  G06F17/10 ,  H04B1/06 ,  H04B10/079 ,  H04B10/61

CPC分类号： H04B10/07951 ,  H04B10/61

摘要： A chromatic dispersion measurement method is provided. According to the method, chromatic dispersion sequence processing is performed on acquired frequency domain data to obtain chromatic dispersion sequences of frequency domain data. A correlation operation on the obtained chromatic dispersion sequences is separately performed at a preset interval. A sum of obtained correlation values is calculated to obtain a first value. A chromatic dispersion value is determined according to the first value, a frequency value per unit frequency interval of the frequency domain data and the preset interval. In this way, the chromatic dispersion value can be accurately determined, and the processing efficiency is high.