公开(公告)号：US20230097741A1

公开(公告)日：2023-03-30

申请号：US17909884

申请日：2020-03-11

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Kengo HORIKOSHI ,  Masanori NAKAMURA ,  Seiji OKAMOTO ,  Etsushi YAMAZAKI ,  Asuka MATSUSHITA ,  Takeo SASAI

IPC分类号： H04B10/2525 ,  H04B10/61

摘要： An optical reception apparatus includes a wavelength dispersion compensation unit that performs wavelength dispersion compensation individually on reception signals that are obtained by receiving, by a coherent detecting scheme, an optical signal modulated in a subcarrier modulation scheme and by performing division on a subcarrier-by-subcarrier basis, and a plurality of delay compensation units that compensate for a delay between reception signals at different subcarriers among the reception signals at subcarriers obtained by the wavelength dispersion compensation.

公开(公告)号：US20230077503A1

公开(公告)日：2023-03-16

申请号：US17923387

申请日：2021-05-05

申请人： National Research Council of Canada

发明人： Louis GAUDREAU ,  Jason PHOENIX ,  Sergei STUDENIKIN ,  Marek KORKUSINSKI ,  Alex BOGAN ,  Andrew SACHRAJDA ,  Robin WILLIAMS ,  Piotr ZAWADZKI

IPC分类号： H04B10/2569 ,  H04B10/2525

摘要： A method of transmitting information comprising the steps of: (a) transmitting at least one photon via a fibre; (b) characterizing the fibre by determining at least one depolarization loss caused by the fibre; and (c) compensating for polarization altering effects of the fibre; wherein a single photon source is used for delivery of individual polarized photons in harsh environments.

公开(公告)号：US11329723B2

公开(公告)日：2022-05-10

申请号：US17078921

申请日：2020-10-23

申请人： COMMSCOPE TECHNOLOGIES LLC

发明人： Earl Ryan Parsons ,  Richard Y. Mei

IPC分类号： H04J14/02 ,  H04B10/2525

摘要： An O-band optical communication system includes a transmitter, a receiver, and an optical fiber system coupled between the transmitter and the receiver. The optical fiber system includes at least a first fiber segment, with a positive dispersion-wavelength gradient and a first zero dispersion wavelength, coupled in series to a second fiber segment, with a negative dispersion-wavelength gradient and a second zero dispersion wavelength. When an optical signal propagating along the first fiber segment has a wavelength shorter than the first zero dispersion wavelength and experiences negative dispersion, at least partial positive dispersion compensation is provided by propagation along the second fiber segment. When light of the optical signal propagating along the first fiber segment has a wavelength longer than the first zero dispersion wavelength and experiences positive dispersion, at least partial negative dispersion compensation is provided by propagation along the second fiber segment.

公开(公告)号：US20210194587A1

公开(公告)日：2021-06-24

申请号：US16078126

申请日：2017-01-03

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： Fabio Cavaliere ,  Michele MIDRIO ,  Marco ROMAGNOLI ,  Vito SORIANELLO

IPC分类号： H04B10/2513 ,  H04B10/2525 ,  H04B10/2569

摘要： A device (10;150;200) is configured to receive an optical signal. The device comprises a dispersion compensator (210a) comprising a plurality of optical dispersion compensator units (220). Each optical dispersion compensator unit comprises a plurality of delay elements (20;40). The dispersion compensator (210a) is configured to selectively activate one or more of the optical dispersion compensator units (220). The dispersion compensator (210a) is configured to compensate for dispersion of the optical signal with the activated one or more optical dispersion compensator unit (200).

公开(公告)号：US10944475B2

公开(公告)日：2021-03-09

申请号：US16510418

申请日：2019-07-12

申请人： HUAWEI TECHNOLOGIES CO., LTD.

发明人： Liang Zhang ,  Qiang Zhang ,  Enbo Zhou

IPC分类号： H04B10/04 ,  H04B10/2525 ,  G02F1/21 ,  H04L27/26

摘要： This application relates to the communications field, and discloses a signal transmitting method and apparatus, a transmitter, and a signal transmission system. An example method includes: generating a real-number-type signal; performing phase rotation processing on the real-number-type signal to obtain a complex-number-type signal, where a value of a real part signal of the complex-number-type signal is equal to a value of an imaginary part signal of the complex-number-type signal; and transmitting the complex-number-type signal to a receiver.

公开(公告)号：US20180183522A1

公开(公告)日：2018-06-28

申请号：US15388564

申请日：2016-12-22

申请人： Intel Corporation

发明人： Georgios C. Dogiamis ,  Emanuel Cohen ,  Sasha N. Oster ,  Telesphor Kamgaing

IPC分类号： H04B10/2525 ,  H04B10/2575 ,  H04L25/03 ,  H04J14/00

CPC分类号： H04L25/03834 ,  H04B10/90 ,  H04L25/03343

摘要： Embodiments of the present disclosure may relate to a transmitter that includes a baseband dispersion compensator to perform baseband dispersion compensation on an input signal. Embodiments may also include a receiver that includes a radio frequency (RF) dispersion compensator to perform RF dispersion compensation. Embodiments may also include a dielectric waveguide coupled with the transmitter and the receiver, the dielectric waveguide to convey the RF signal from the transmitter to the receiver. Other embodiments may be described and/or claimed.

公开(公告)号：US09906305B2

公开(公告)日：2018-02-27

申请号：US15066381

申请日：2016-03-10

申请人： ZTE Corporation

发明人： Jianjun Yu ,  Xinying Li

IPC分类号： H04B10/54 ,  H04B10/90 ,  H04B10/2525 ,  H04B10/572 ,  H04B10/548 ,  H04B10/2575

CPC分类号： H04B10/541 ,  H04B10/2575 ,  H04B10/548 ,  H04B10/572 ,  H04B10/90 ,  H04B2210/006

摘要： An optical signal transmitter produces optical signals comprising QAM modulated vector signals generated using a single external electro-optical modulator operated in conjunction with a wavelength selective switch. The transmission processing achieves adaptive photonic frequency multiplication and comprises QAM modulated signals with high order constellations such as 8-QAM, 16-QAM, and 64-QAM.

公开(公告)号：US09036998B2

公开(公告)日：2015-05-19

申请号：US13968601

申请日：2013-08-16

申请人： OFS Fitel, LLC

发明人： Ole A Levring

IPC分类号： H04B10/12 ,  G02B6/02 ,  H04B10/2507 ,  H04B10/2525 ,  G02B6/036

CPC分类号： G02B6/0228 ,  G02B6/03666 ,  H04B10/2507 ,  H04B10/25253

摘要： An undersea long-haul transmission system includes an optical fiber transmission span and a coherent detection and digital signal processing module for providing dispersion compensation. The transmission span includes at least one fiber pair comprising substantially equal lengths of a positive-dispersion first fiber and a negative-dispersion second fiber that are configured to provide a signal output at transmission distances greater than 10,000 km, in which the combined accumulated dispersion across the operating bandwidth does not exceed the dispersion-compensating capacity of the coherent detection and digital signal processing module. Further described is a fiber for use in an undersea long-haul transmission span. At a transmission wavelength of 1550 nm, the fiber has a dispersion coefficient in the range of −16 to −25 ps/nm·km, and a dispersion slope in the range of 0.04 to 0.02 ps/nm2·km.

摘要翻译： 海底长途传输系统包括一个光纤传输跨度和一个相干检测和数字信号处理模块，用于提供色散补偿。 传输跨度包括至少一个光纤对，其包括基本相等长度的正色散第一光纤和负色散第二光纤，其被配置为在大于10,000km的传输距离处提供信号输出，其中， 工作带宽不超过相干检测和数字信号处理模块的色散补偿能力。 进一步描述的是用于海底长途运输跨度的纤维。 在1550nm的透射波长下，光纤的色散系数为-16〜-25ps / nm·km，色散斜率为0.04〜0.02ps / nm2·km。

公开(公告)号：US08909052B2

公开(公告)日：2014-12-09

申请号：US13597555

申请日：2012-08-29

申请人： Eyal Lichtman

发明人： Eyal Lichtman

IPC分类号： H04J14/02 ,  H04B10/00 ,  H04B10/04 ,  H04B10/2525

CPC分类号： H04B10/25253

摘要： A method is provided for carrying out dispersion compensation in an optical mesh network supporting simultaneously traffic services being provided at two or three different bit rates including a basic bit rate being 10 Gbps and at least one higher bit rate selected from among 40 Gbps and 100 Gbps. The method comprises the following steps: providing in-line dispersion compensation for every span in the network so as to reach positive average residual dispersion RDS per span extending to less than about 3 km; providing start points of possible trails in the network with respective external, pre-compensation negative Dispersion Compensation modules (DCMs), and providing termination points of possible trails in the network with respective external post-compensation positive DCMs.

摘要翻译： 提供了一种用于在支持同时以两个或三个不同比特率提供的业务业务的光网络网络中进行色散补偿的方法，包括基本比特率为10Gbps，以及从40Gbps和100Gbps中选择的至少一个较高比特率 。 该方法包括以下步骤：为网络中的每个跨度提供在线色散补偿，以便达到每个跨越小于约3公里的正平均残差色散RDS; 通过相应的外部预补偿负色散补偿模块（DCM）在网络中提供可能路径的起始点，并在网络中提供相应的外部后补偿正DCM的可能路径的终点。

公开(公告)号：US20050265726A1

公开(公告)日：2005-12-01

申请号：US11180603

申请日：2005-07-14

申请人： Hitoshi Murai

发明人： Hitoshi Murai

IPC分类号： H04B10/2507 ,  H04B10/07 ,  H04B10/2525 ,  H04B10/516 ,  H04B10/556 ,  H04B10/61 ,  H04B10/12

CPC分类号： H04B10/299 ,  H04B10/25077 ,  H04B10/505 ,  H04B10/50577 ,  H04B10/50597 ,  H04B10/508

摘要： An optical transmission line allows optical signals to be transmitted with higher stability over longer distances. According to a first aspect, an optical NRZ signal is split in two, one half is presented to a clock extraction circuit, and the other half is presented to an EA modulator. An optical RZ signal is obtained as an output because the EA modulator is energized by the provided clock component. According to a second aspect, a nonlinear phase shift based on cross-phase modulation is induced in an RZ pulse train by an optical NRZ signal, and only the RZ pulses corresponding to the optical NRZ signal are extracted. According to a third aspect, first dispersion compensator is provided to a preceding stage of an optical fiber transmission line for transmitting optical pulses, and second dispersion compensation compensator is provided to a subsequent stage. Pulse widening in the optical fiber transmission line is controlled by a nonlinear chirp induced in the first dispersion compensator.