公开(公告)号：US12126381B2

公开(公告)日：2024-10-22

申请号：US17894966

申请日：2022-08-24

Applicant: MACOM Technology Solutions Holdings, Inc.

Inventor： Ryan Latchman

IPC: H04B10/2543 ,  H04B10/077 ,  H04B10/2507

CPC classification number: H04B10/2543 ,  H04B10/0775 ,  H04B10/25073

Abstract: A communication interface comprising a host with non-linear equalizers configured to perform non-linear equalization. Also part of the interface is a host to optic module channel electrically connecting the host to an optic module and the optic module. The optic module comprises a transmitter and a receiver. The transmitter includes a linear equalizer and an electrical to optical module configured to convert the equalized signal from the driver to an optical signal, and transmit the optical signal over a fiber optic cable, such that the transmitter does not perform non-linear processing. The receiver includes a photodetector, configured to convert the received optic signal to a received electrical signal, and a linear amplifier configured to perform linear amplification on the received electrical signal. A driver sends the amplified received signal over an optic module to host channel, such that the receive does not perform non-linear processing.

公开(公告)号：US20240267121A1

公开(公告)日：2024-08-08

申请号：US18583242

申请日：2024-02-21

Applicant: Attochron, LLC

Inventor： Thomas M. Chaffee ,  Wayne H. Knox

IPC: H04B10/11 ,  H04B10/2507 ,  H04B10/2519

CPC classification number: H04B10/11 ,  H04B10/25073 ,  H04B10/2519

Abstract: Systems and methods are described for transmitting information optically. For instance, a system may include an optical source configured to generate a beam of light. The system may include at least one modulator configured to encode data on the beam of light to produce an encoded beam of light/encoded plurality of pulses. The system may include a spectrally-equalizing amplifier configured to receive the encoded beam of light/encoded plurality of pulses from the at least one modulator and both amplify and filter the encoded beam of light/encoded plurality of pulses to produce a filtered beam of light/filtered plurality of pulses, thereby spectrally equalizing a gain applied to the encoded beam of light. In some cases, the system may slice the beam of slight, to ensure a detector has impulsive detection. In some cases, the system may include a temperature controller to shift a distribution curve of wavelengths of the optical source.

公开(公告)号：US11855702B2

公开(公告)日：2023-12-26

申请号：US17674234

申请日：2022-02-17

Applicant: Marvell Asia Pte., Ltd.

Inventor： Benjamin P. Smith ,  Jamal Riani ,  Sudeep Bhoja ,  Arash Farhoodfar ,  Vipul Bhatt

IPC: H04B10/69 ,  H04B10/58 ,  H04B10/2507 ,  H04B10/54 ,  H04B10/516 ,  H04B10/00

CPC classification number: H04B10/58 ,  H04B10/00 ,  H04B10/2507 ,  H04B10/25073 ,  H04B10/5161 ,  H04B10/541 ,  H04B10/697 ,  H04B10/6971

Abstract: A circuit and method for mitigating multi-path interference in direct detection optical systems is provided. Samples of an optical signal having a pulse amplitude modulated (PAM) E-field are processed by generating a PAM level for each sample. For each sample, the sample is subtracted from the respective PAM level to generate a corresponding error sample. The error samples are lowpass filtered to produce estimates of multi-path interference (MPI). For each sample, one of the estimates of MPI is combined with the sample to produce an interference-mitigated sample.

公开(公告)号：US20230141712A1

公开(公告)日：2023-05-11

申请号：US18096503

申请日：2023-01-12

Applicant: MACOM Technology Solutions Holdings Inc.

Inventor： Ryan Latchman

IPC: H04B10/2507 ,  H04L27/01 ,  H04B10/2575

CPC classification number: H04B10/25073 ,  H04L27/01 ,  H04B10/25759 ,  H04B10/40

Abstract: An optical module configured to electrically connect to a host. A linear equalizer performs equalization on a host equalized signal to create a module equalized signal, and a driver configured to present the module equalized signal from the linear equalizer to an optical conversion device at a magnitude suitable for the optical conversion device. An optical conversion device receives the module equalized signal from the driver, converts the module equalized signal to an optical signal, and transmit the optical signal over an optical channel. Also part of the optical module is an interface which communicates supplemental equalizer settings to the host. A memory stores the supplemental equalizer settings which reflect the optical modules effect on a signal passing through the optical module. A controller oversees communication of the supplemental equalizer settings to the host such that the host uses the supplemental equalizer settings to modify host equalizer settings.

公开(公告)号：US09882648B2

公开(公告)日：2018-01-30

申请号：US15387246

申请日：2016-12-21

Applicant: INPHI Corporation

Inventor： Oscar Ernesto Agazzi ,  Diego Ernesto Crivelli ,  Hugo Santiago Carrer ,  Mario Rafael Hueda ,  German Cesar Augusto Luna ,  Carl Grace

IPC: H04B1/38 ,  H04L5/16 ,  H04B10/50 ,  H04B10/69 ,  H03M13/41 ,  H04L25/02 ,  H04B10/2507 ,  H04B10/294 ,  H04B3/23 ,  H04B7/005 ,  H04B1/04

CPC classification number: H04B10/5059 ,  H03M13/41 ,  H04B1/38 ,  H04B3/235 ,  H04B7/005 ,  H04B7/0456 ,  H04B10/25073 ,  H04B10/2941 ,  H04B10/40 ,  H04B10/6971 ,  H04B2001/0441 ,  H04B2201/709772 ,  H04L5/16 ,  H04L25/0202 ,  H04L25/025 ,  H04L25/03038 ,  H04L25/03057 ,  H04L2025/03477 ,  H04L2025/03617

Abstract: A receiver (e.g., for a 10G fiber communications link) includes an interleaved ADC coupled to a multi-channel equalizer that can provide different equalization for different ADC channels within the interleaved ADC. That is, the multi-channel equalizer can compensate for channel-dependent impairments. In one approach, the multi-channel equalizer is a feedforward equalizer (FFE) coupled to a Viterbi decoder, for example a sliding block Viterbi decoder (SBVD); and the FFE and/or the channel estimator for the Viterbi decoder are adapted using the LMS algorithm.

公开(公告)号：US20170170902A1

公开(公告)日：2017-06-15

申请号：US15375714

申请日：2016-12-12

Applicant: FUJITSU LIMITED

Inventor： Yangyang FAN ,  Zhenning TAO ,  Liang DOU

IPC: H04B10/2507 ,  H04B10/079 ,  H04B10/58

CPC classification number: H04B10/25073 ,  H04B10/0731 ,  H04B10/07955 ,  H04B10/58

Abstract: A method and apparatus for measuring a filtering characteristic, pre-equalizer and communication equipment. The method includes: obtaining a receiving signal after two measurement signals of different spectral ranges pass through different filtering modules and are received at the same time at a receiving end; and determining a part of a filtering characteristic of a receiving end and a part of a joint response according to a nonoverlapped spectral part of the two signals in the spectrum of the receiving signal.

公开(公告)号：US09621382B1

公开(公告)日：2017-04-11

申请号：US14798083

申请日：2015-07-13

Applicant: Clariphy Communications, Inc.

Inventor： Shih Cheng Wang ,  Seyedmohammadreza Motaghiannezam ,  Matthew C. Bashaw

IPC: H04L25/03 ,  H04B10/079

CPC classification number: H04B10/0795 ,  H04B10/07 ,  H04B10/25073 ,  H04B10/614 ,  H04B10/616 ,  H04L7/0058 ,  H04L25/03 ,  H04L25/03019 ,  H04L25/03292 ,  H04L25/03878 ,  H04L27/01

Abstract: A receiver applies a calibration method to compensate for skew between input channels. The receiver skew is estimated by observing the coefficients of an adaptive equalizer which adjusts the coefficients based on time-varying properties of the multi-channel input signal. The receiver skew is compensated by programming the phase of the sampling clocks for the different channels. Furthermore, during real-time operation of the receiver, channel diagnostics is performed to automatically estimate differential group delay and/or other channel characteristics based on the equalizer coefficients using a frequency averaging or polarization averaging approach. Framer information can furthermore be utilized to estimate differential group delay that is an integer multiple of the symbol rate. Additionally, a DSP reset may be performed when substantial signal degradation is detected based on the channel diagnostics information.

公开(公告)号：US09531475B2

公开(公告)日：2016-12-27

申请号：US14480085

申请日：2014-09-08

Applicant: ClariPhy Communications. Inc.

Inventor： Oscar Ernesto Agazzi ,  Diego Ernesto Crivelli ,  Hugo Santiago Carrer ,  Mario Rafael Hueda ,  German Cesar Augusto Luna ,  Carl Grace

IPC: H04B1/38 ,  H04L5/16 ,  H04B10/40 ,  H04B10/69 ,  H04L25/03 ,  H04L25/02

CPC classification number: H04B10/5059 ,  H03M13/41 ,  H04B1/38 ,  H04B3/235 ,  H04B7/005 ,  H04B7/0456 ,  H04B10/25073 ,  H04B10/2941 ,  H04B10/40 ,  H04B10/6971 ,  H04B2001/0441 ,  H04B2201/709772 ,  H04L5/16 ,  H04L25/0202 ,  H04L25/025 ,  H04L25/03038 ,  H04L25/03057 ,  H04L2025/03477 ,  H04L2025/03617

Abstract: A receiver (e.g., for a 10G fiber communications link) includes an interleaved ADC coupled to a multi-channel equalizer that can provide different equalization for different ADC channels within the interleaved ADC. That is, the multi-channel equalizer can compensate for channel-dependent impairments. In one approach, the multi-channel equalizer is a feedforward equalizer (FFE) coupled to a Viterbi decoder, for example a sliding block Viterbi decoder (SBVD); and the FFE and/or the channel estimator for the Viterbi decoder are adapted using the LMS algorithm.

Abstract translation: 接收机（例如，用于10G光纤通信链路）包括耦合到多信道均衡器的交错ADC，其可以为交错ADC内的不同ADC信道提供不同的均衡。 也就是说，多通道均衡器可以补偿信道相关的损伤。 在一种方法中，多信道均衡器是耦合到维特比解码器（例如滑块维特比解码器（SBVD））的前馈均衡器（FFE）; 并且使用LMS算法适配维特比解码器的FFE和/或信道估计器。

公开(公告)号：US09344193B2

公开(公告)日：2016-05-17

申请号：US14947539

申请日：2015-11-20

Applicant: Ciena Corporation

Inventor： David W. Boertjes ,  Kevin MacNeill ,  Jamie Gaudette

IPC: H04B10/04 ,  H04B10/2513 ,  H04B10/516 ,  H04L25/03 ,  H04J14/06 ,  H04B10/61 ,  H04L7/00

CPC classification number: H04B10/25137 ,  H04B10/25073 ,  H04B10/516 ,  H04B10/6161 ,  H04B10/6162 ,  H04J14/06 ,  H04L7/0075 ,  H04L25/03828

Abstract: A method and system for generating an optical channel signal for transmission through an optical fiber link of an optical communications system. A digital filter processes an input data signal using a compensation function and a shaping function to generate a pair of multi-bit sample streams representing a target optical E-field envelope of the optical channel signal. A modulator modulates an optical carrier light using the pair of multi-bit sample streams to generate the optical channel signal. The compensation function is designed to at least partially compensate impairments of the optical fiber link. The predetermined shaping function is designed to modify a baseband spectrum of the target optical E-field envelope.

公开(公告)号：US09225421B2

公开(公告)日：2015-12-29

申请号：US14303873

申请日：2014-06-13

Applicant: NEC Laboratories America, Inc.

Inventor： Akihiro Tanaka ,  Neda Cvijetic

IPC: H04J14/02 ,  H04B10/2507 ,  H04B10/516 ,  H04B10/54 ,  H04B10/548

CPC classification number: H04B10/25073 ,  H04B10/5161 ,  H04B10/541 ,  H04B10/548 ,  H04J14/02

Abstract: Methods and systems for combining signals include modulating data onto a first signal at a first frequency and wavelength; modulating data onto a second signal at a second wavelength using a modulation scheme that produces spectral components at the first frequency; filtering the second signal using an optical filter to suppress spectral components that would cause interference to the first signal; and combining the first signal and the second signal onto a transmission medium.

Abstract translation: 用于组合信号的方法和系统包括以第一频率和波长将数据调制到第一信号上; 使用在第一频率产生频谱分量的调制方案将数据调制到第二波长的第二信号上; 使用光学滤波器对第二信号进行滤波以抑制将对第一信号造成干扰的频谱分量; 以及将所述第一信号和所述第二信号组合到传输介质上。