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309 条记录 (耗时 0.033 秒)

    Variable Rate Optical Transmitter Based on All-Optical OFDM Super-Channel Technology
    51.
    发明申请
    Variable Rate Optical Transmitter Based on All-Optical OFDM Super-Channel Technology 有权
    基于全光OFDM超频技术的可变速率光发射机

    公开(公告)号：US20130058648A1

    公开(公告)日：2013-03-07

    申请号：US13588425

    申请日：2012-08-17

    申请人： Philip Nan Ji ,  Yue-Kai Huang ,  Ting Wang

    发明人： Philip Nan Ji ,  Yue-Kai Huang ,  Ting Wang

    IPC分类号： H04J14/00

    CPC分类号： H04B10/548 ,  H04J14/0221 ,  H04J14/0298 ,  H04L27/2096 ,  H04L27/2697

    摘要： The present invention is directed to a method including determining an appropriate power level for a phase modulator for an optimum number of subcarriers; and applying the determined appropriate power level via a controller to produce the optimum number of subcarriers, wherein the optimum number of subcarriers enables an optical-orthogonal frequency division multiplex O-OFDM based variable rate transmitter with automatic control by a controller to produce an optimum setting based on a required rate.

    摘要翻译： 本发明涉及一种方法，包括为最佳数量的子载波确定相位调制器的适当功率电平; 以及经由控制器应用所确定的适当的功率电平以产生最佳数量的子载波，其中最佳数量的子载波使得能够由控制器自动控制的光正交频分复用O-OFDM可变速率发射机产生最佳设置 基于所需的费率。

    Modified Michelson Interferometer Structure for Inter-Symbol Interference-Suppressed Colorless DPSK Demodulation
    52.
    发明申请
    Modified Michelson Interferometer Structure for Inter-Symbol Interference-Suppressed Colorless DPSK Demodulation 审中-公开
    用于符号间干扰抑制无色DPSK解调的改进的迈克尔逊干涉仪结构

    公开(公告)号：US20100232789A1

    公开(公告)日：2010-09-16

    申请号：US12731830

    申请日：2010-03-25

    申请人： Philip Nan Ji ,  Lei Xu ,  Ting Wang ,  Shuji Murakami ,  Tsutomu Tajima ,  Yutaka Yano

    发明人： Philip Nan Ji ,  Lei Xu ,  Ting Wang ,  Shuji Murakami ,  Tsutomu Tajima ,  Yutaka Yano

    IPC分类号： H04B10/08

    CPC分类号： H04B10/677

    摘要： An optical device includes an interferometer for a received optical differential phase shift keying DPSK signal, and an equalizer integrated with the interferometer in a manner for reducing from optical filtering effects an interference by signal bits of the DPSK signal with signal bits of a contiguous DPSK signal. The interferometer is a Michelson delay interferometer type, but can also be a Mach-Zehnder delay interferometer type on fiber, waveguide or other optical structure. The equalizer is a Fabry-Perot type equalizer, but can be a ring resonator type or a fiber based equalizer.

    摘要翻译： 光学装置包括用于接收的光学差分相移键控DPSK信号的干涉仪，以及与干涉仪集成的均衡器，以减少光学滤波的方式，利用DPSK信号的信号位与相邻DPSK信号的信号位的干扰 。 干涉仪是迈克尔逊延迟干涉仪型号，但也可以是光纤，波导或其他光学结构上的马赫 - 曾德延迟干涉仪。 均衡器是法布里 - 珀罗型均衡器，但可以是环形谐振器型或基于光纤的均衡器。

    Optical communication system and method for generating dark return-to zero and DWDM optical MM-Wave generation for ROF downstream link using optical phase modulator and optical interleaver
    53.
    发明授权
    Optical communication system and method for generating dark return-to zero and DWDM optical MM-Wave generation for ROF downstream link using optical phase modulator and optical interleaver 失效
    用于使用光相位调制器和光交错器生成用于ROF下行链路的暗归零和DWDM光MM-Wave生成的光通信系统和方法

    公开(公告)号：US07761012B2

    公开(公告)日：2010-07-20

    申请号：US11621765

    申请日：2007-01-10

    申请人： Jianjun Yu ,  Lei Xu ,  Philip Nan Ji ,  Ting Wang

    发明人： Jianjun Yu ,  Lei Xu ,  Philip Nan Ji ,  Ting Wang

    IPC分类号： H04B10/04

    CPC分类号： H04B10/508 ,  H04B10/2575 ,  H04B10/505 ,  H04J14/02 ,  H04J14/0256

    摘要： A method of generating a dark-RZ pulse in an optical communications system with a dual-arm modulator by setting a direct current bias on the modulator to a specific value such that an output optical power from the modulator achieves a maximum value when the RF signals on the first and second arms of the modulator are off and maintaining the direct current bias at the specific value and applying RF signals to the first and second arms of the modulator and delaying one of the RF signals applied to one of the first and second arms relative to the other of the RF signals such that a dark-RZ pulse is generated with a duty cycle based on the delay. Another aspect of the invention provides a method for generating dense wave division multiplexing (DWDM) optical mm-waves in an optical transmission system by phase modulated DWDM optical signal and applying the phase modulated DWDM optical signal to an input port of an optical interleaver, the optical interleaver having a specified bandwidth to suppress the optical carriers and convert the DWDM optical signal to DWDM optical mm-waves; and amplifying the DWDM optical mm-waves and transmitting the DWDM optical mm-waves over single mode fiber (SMF).

    摘要翻译： 一种在具有双臂调制器的光通信系统中通过将调制器上的直流偏置设置为特定值来产生暗RZ脉冲的方法，使得来自调制器的输出光功率在RF信号 在调制器的第一和第二臂处关闭并将直流偏压保持在特定值并且将RF信号施加到调制器的第一和第二臂并且延迟施加到第一和第二臂之一的RF信号之一 相对于RF信号中的另一个，使得以基于延迟的占空比产生暗RZ脉冲。 本发明的另一方面提供了一种通过相位调制DWDM光信号在光传输系统中产生密集波分复用（DWDM）光学毫米波的方法，并将相位调制的DWDM光信号应用于光交织器的输入端口， 具有指定带宽的光交错器以抑制光载波并将DWDM光信号转换为DWDM光学毫米波; 并放大DWDM光学毫米波，并通过单模光纤（SMF）传输DWDM光学毫米波。

    PHOTONIC FILTER BANK FOR HIGH-SPEED ANALOG-TO-DIGITAL CONVERSION
    54.
    发明申请
    PHOTONIC FILTER BANK FOR HIGH-SPEED ANALOG-TO-DIGITAL CONVERSION 有权
    用于高速模拟数字转换的光电滤波器

    公开(公告)号：US20090251345A1

    公开(公告)日：2009-10-08

    申请号：US12200219

    申请日：2008-08-28

    申请人： Yue-Kai Huang ,  Ting Wang ,  Philip Nan Ji

    发明人： Yue-Kai Huang ,  Ting Wang ,  Philip Nan Ji

    IPC分类号： H03M1/00

    CPC分类号： G02F7/00

    摘要： An analog to digital converter (ADC) structure and method includes a photonic filter bank having at least two filters. The at least two filters are configured to create a corresponding spectral tributary from an input signal at a target rate, and the at least two filters are configured to exhibit orthogonality properties between respective tributaries. An optical/electrical (O/E) converter is coupled to each of the at least two filters in a respective spectral tributary to convert an optical input to an electrical output. An analog to digital converter (ADC) is coupled to each of the O/E converters in a respective spectral tributary to sample the electrical output at a fraction of a target rate and to convert a sampled analog electrical output into a digital signal. A synthesis filter is coupled to each of the ADCs in a respective spectral tributary to reconstruct the input signal digitally at the target rate.

    摘要翻译： 模数转换器（ADC）结构和方法包括具有至少两个滤波器的光子滤波器组。 所述至少两个滤波器被配置为以目标速率从输入信号创建相应的频谱支路，并且所述至少两个滤波器被配置为在各个支路之间呈现正交性质。 光/电（O / E）转换器耦合到相应频谱支路中的至少两个滤波器中的每一个，以将光输入转换成电输出。 模数转换器（ADC）被耦合到相应频谱支路中的每个O / E转换器，以目标速率的一小部分对电输出进行采样，并将采样的模拟电输出转换为数字信号。 合成滤波器耦合到相应频谱支路中的每个ADC，以目标速率数字地重构输入信号。

    Intra-Channel Equalizing Optical Interleaver
    55.
    发明申请
    Intra-Channel Equalizing Optical Interleaver 有权
    信道内均衡光交织器

    公开(公告)号：US20090162066A1

    公开(公告)日：2009-06-25

    申请号：US12128748

    申请日：2008-05-29

    申请人： Philip Nan Ji ,  Lei Xu ,  Ting Wang ,  Shuji Murakami ,  Tsutomu Tajima ,  Yutaka Yano

    发明人： Philip Nan Ji ,  Lei Xu ,  Ting Wang ,  Shuji Murakami ,  Tsutomu Tajima ,  Yutaka Yano

    IPC分类号： H04J14/02

    CPC分类号： G02B6/29386 ,  G02B6/29335 ,  G02B6/2935 ,  G02B6/29358 ,  H04B10/25073 ,  H04J14/02

    摘要： An apparatus includes an interleaver configuration for at least one of combining or separating odd and even channel groups to achieve channel density doubling; and an optical equalizer for suppressing inter symbol interference within the channels to provide intra-channel equalizing in the optical path, the equalizer being integrated into the interleaver. Preferably, optical equalizer and interleaver are integrated together as a single monolithic device, the optical equalizer includes a passband that has a dip in the channel center to achieve a raised-cosine filtering profile in the optical signal path to achieve inter-symbol interference ISI suppression, and the equalizer includes integration into the optical path of the interleaver to realize a monolithic device combining or separating odd and even channel groups to achieve channel density doubling. Preferably, also, the optical equalizer includes a first equalizer with half the depth of required ripple dips at both a first output port and an input port and a second equalizer with half the depth of required ripple dips at a second output port.

    摘要翻译： 一种装置包括用于组合或分离奇数和偶数信道组中的至少一个的交织器配置，以实现信道密度倍增; 以及光学均衡器，用于抑制信道内的符号间干扰，以在光路中提供信道间均衡，均衡器被集成到交织器中。 优选地，光学均衡器和交织器作为单个单片器件集成在一起，光学均衡器包括通道，该通带在信道中心具有下降以在光信号路径中实现升余弦滤波曲线，以实现符号间干扰ISI抑制 并且均衡器包括集成到交织器的光路中，以实现组合或分离奇数和偶数信道组的单片设备，以实现信道密度加倍。 优选地，光学均衡器还包括第一均衡器，其具有在第一输出端口和输入端口处的所需波纹下降的一半深度，以及在第二输出端口处具有所需纹波下降的一半深度的第二均衡器。

    Triplexer transceiver using parallel signal detection
    56.
    发明授权
    Triplexer transceiver using parallel signal detection 有权
    使用并行信号检测的三路收发器

    公开(公告)号：US07529484B2

    公开(公告)日：2009-05-05

    申请号：US11276486

    申请日：2006-03-02

    申请人： Lei Xu ,  Lei Zong ,  Philip Nan Ji ,  Ting Wang ,  Yuji Abe

    发明人： Lei Xu ,  Lei Zong ,  Philip Nan Ji ,  Ting Wang ,  Yuji Abe

    IPC分类号： H04J14/00 ,  H04J14/02

    CPC分类号： H04J14/0226 ,  H04B10/40 ,  H04J14/0232 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0282 ,  H04J14/0298

    摘要： An optical triplexer transceiver that utilizes parallel signal detection for use in broadband passive optical networks (B-PONs). The triplexer transceiver includes an optical filter comprising a first port coupled to a laser for receiving upstream optical data signals, a second port for passing the upstream optical data signals to a network, and for receiving combined downstream optical data and video signals from the network, the video signals modulated by subcarrier modulation (SCM), and a third port for communicating the combined downstream optical data and video signals to a photodetector constructed and arranged for simultaneously receiving the combined downstream optical data and video signals and converting the optical data and video signals to electrical signals. A plurality of filters are coupled to the photodetector for separating the combined downstream data and video signals, including a low-pass filter for passing the downstream data signals, and a band-pass filter for passing the video signals. The video signals are coherently detected in a number of stages corresponding to stages of SCM applied to the video signals. The triplexer transceiver is adapted to receive optical video signals that have been subjected first and second stages of SCM to move the spectra of the SCM video signals to a higher frequency range that does not overlap with a frequency range of the baseband data signals.

    摘要翻译： 一种使用并行信号检测用于宽带无源光网络（B-PON）的光学三重收发器。 三重收发器包括光滤波器，其包括耦合到激光器的第一端口用于接收上游光数据信号，用于将上游光数据信号传递到网络的第二端口，以及用于从网络接收组合的下行光数据和视频信号， 通过副载波调制（SCM）调制的视频信号和用于将组合的下行光数据和视频信号传送到光电探测器的第三端口，该光电探测器被构造和布置成同时接收组合的下行光数据和视频信号并转换光数据和视频信号 到电信号。 多个滤波器耦合到光电检测器，用于分离组合的下行数据和视频信号，包括用于通过下行数据信号的低通滤波器和用于传递视频信号的带通滤波器。 视频信号在对应于应用于视频信号的单片机的阶段的多个级中被相干检测。 三重收发器适于接收已经经历SCM的第一和第二级的光学视频信号，以将SCM视频信号的频谱移动到与基带数据信号的频率范围不重叠的较高频率范围。

    Look-up table and digital transmitter based architecture for fiber nonlinearity compensation
    58.
    发明授权
    Look-up table and digital transmitter based architecture for fiber nonlinearity compensation 有权
    查找表和基于数字发射机的架构，用于光纤非线性补偿

    公开(公告)号：US08654439B2

    公开(公告)日：2014-02-18

    申请号：US13081707

    申请日：2011-04-07

    申请人： Dayou Qian ,  Ting Wang

    发明人： Dayou Qian ,  Ting Wang

    IPC分类号： H01S3/10

    CPC分类号： H04B10/2543

    摘要： Systems and methods are disclosed to process an optical signal using a pre-processor to populate a non-linearity compensation data structure based on a set of predetermined rules in a non-real-time off-line mode; and an amplifier applying said predetermined rules in real-time to one or more channel input data using the data structure to determine a non-linearity compensation output.

    摘要翻译： 公开了系统和方法，以使用预处理器处理光信号，以基于非实时离线模式中的一组预定规则来填充非线性补偿数据结构; 以及使用所述数据结构将所述预定规则实时地应用于一个或多个信道输入数据以确定非线性补偿输出的放大器。