All-optical high bit-rate multiplexer

    公开(公告)号:US07035542B2

    公开(公告)日:2006-04-25

    申请号:US10067933

    申请日:2002-02-08

    IPC分类号: H04J4/00 H04J14/00

    摘要: The present invention propose to use an optical multiplexer associated with an optical clock as a wavelength converter. Each RZ coded tributary will be carried by a single wavelength (channel) passively interleaved with the others without interferometric interaction hence achieving a not necessarily perfect OTDM. This input data stream as optical data signal composed of different wavelengths is then launched on at least one data access of said optical multiplexer used as a wavelength converter. An optical clock at the desired bit-rate is launched on the probe access of said optical multiplexer synchronously to the multi-wavelength data stream. At the output, the initial clock wavelength is converted on data signal using the gain conversion property of the optical multiplexer. In such a way, a data stream of substantially higher bit-rate is obtained while due to a very precise synchronization a lost of data is minimized.

    Optical fiber transmission system using soliton signals with wavelength division multiplexing
    2.
    发明授权
    Optical fiber transmission system using soliton signals with wavelength division multiplexing 失效
    使用波分复用的孤子信号的光纤传输系统

    公开(公告)号:US06341022B1

    公开(公告)日:2002-01-22

    申请号:US09172867

    申请日:1998-10-15

    IPC分类号: H04J1402

    CPC分类号: H04B10/25077

    摘要: The invention relates to an optical fiber transmission system using soliton signals with wavelength division multiplexing in which the wavelengths, &lgr;1 to &lgr;n, of the various channels of the multiplex are selected in such a manner that at least one point of the transmission system, the difference between the bit times of any two channels of the multiplex is substantially a submultiple T/N of the clock period. The invention proposes placing a synchronous modulator at said point to modulate the soliton signals at a frequency N/T which is a multiple of the soliton clock frequency 1/T. In a frequency allocation scheme that ensures that the bit times of the channels are synchronous at an interval ZR, this makes it possible to modulate all of the channels at intervals that are submultiples of ZR by using modulation frequencies that are multiples of the clock frequency.

    摘要翻译: 本发明涉及一种使用波分复用的孤子信号的光纤传输系统,其中选择多路复用的各种信道的波长lambd1至lambdn,使得传输系统的至少一个点,差分 在多路复用的任何两个信道的比特时间之间基本上是时钟周期的多余T / N。 本发明提出在所述点设置同步调制器以以孤子时钟频率1 / T的倍数的频率N / T来调制孤子信号。 在确保信道的位时间以ZR间隔同步的频率分配方案中,这使得可以通过使用作为时钟频率的倍数的调制频率来调制ZR的次数的间隔的所有信道。

    Optical module for multi-channel wavelength multiplexing
    3.
    发明授权
    Optical module for multi-channel wavelength multiplexing 失效
    用于多通道波长复用的光模块

    公开(公告)号:US06611639B2

    公开(公告)日:2003-08-26

    申请号:US10123112

    申请日:2002-04-17

    IPC分类号: G02B600

    CPC分类号: H04B10/2525 H04J14/02

    摘要: An optical module advantageously uses optical conversion fibers not only for a single channel but for sets of channels that are, in a specific way, selected from a multi-channel wave division multiplex (WDM) grid. The sets of channels are defined such that four wave mixing is negligible or has a negligible effect. The optical module has a demultiplexer, a multiplexer, and parallel optical conversion fiber portions that are arranged between the demultiplexer and the multiplexer. Each of the parallel optical conversion fiber portions has a specific dispersion map and transmits a different set of channels of the multi-channel WDM grid. These channels are regularly spaced from each other.

    摘要翻译: 光学模块有利地使用光转换光纤,其不仅用于单个信道,而且用于以特定方式从多信道波分复用(WDM)网格中选择的信道组。 这些通道被定义为使得四个波混合可忽略或具有可忽略的效果。 光模块具有多路分解器,多路复用器和并行光转换光纤部分,其布置在解复用器和多路复用器之间。 每个并行光转换光纤部分具有特定的色散映射,并且传输多通道WDM网格的不同的信道集合。 这些通道彼此间隔规则。

    Device for applying time-delays to optical signals
    4.
    发明授权
    Device for applying time-delays to optical signals 失效
    用于对光信号应用时间延迟的装置

    公开(公告)号:US06744988B2

    公开(公告)日:2004-06-01

    申请号:US09740953

    申请日:2000-12-21

    IPC分类号: H04J1408

    摘要: To delay optical signals precisely and continuously in a very small dynamic range, a device for applying a time-delay to optical signals includes a first phase modulator to receive an input optical signal carried by an original center wavelength and to apply a first stage of phase modulation to the carrier wave of the input signal to supply a first intermediate signal carried by a modified center wavelength, a delaying dispersive member having chromatic dispersion to receive the first intermediate signal and to supply a second intermediate signal, and a second phase modulator to receive the second intermediate signal and to apply a second stage of phase modulation to the carrier wave of the second intermediate signal to supply an output signal carried by the original center wavelength. Applications include optical telecommunication systems, in particular converting wavelength division multiplexed signals into time division multiplexed signals and regenerating wavelength division multiplexed signals.

    摘要翻译: 为了在非常小的动态范围内精确且连续地延迟光信号,用于向光信号施加时间延迟的装置包括:第一相位调制器,用于接收由原始中心波长携带的输入光信号,并施加第一阶段 对输入信号的载波进行调制以提供由修改的中心波长承载的第一中间信号,具有色散以延迟第一中间信号并提供第二中间信号的延迟色散部件,以及第二相位调制器以接收 第二中间信号,并且将第二级的相位调制施加到第二中间信号的载波上,以提供由原始中心波长携带的输出信号。 应用包括光通信系统,特别是将波分多路复用信号转换为时分复用信号和再生波分复用信号。

    Wavelength converter
    5.
    发明授权
    Wavelength converter 有权
    波长转换器

    公开(公告)号:US07437083B2

    公开(公告)日:2008-10-14

    申请号:US10937575

    申请日:2004-09-10

    IPC分类号: H04B10/02

    摘要: A wavelength converter for binary optical signals includes an interferometer structure (110) for generating an output signal by modulating a received local signal (LS) according to the modulation of a fUrther received first input signal (IS 1). When such interferometer structures (110) are operated in a standard mode it is known in the art to control the power of the input signal such that the extinction ratio of the output signal is kept minimal. The invention also controls the power of the input signals to achieve the minimal extinction ratio when the wavelength converter and in particular the interferometer structure (110) is operated in a differential mode receiving two input signals.

    摘要翻译: 用于二进制光信号的波长转换器包括干涉仪结构(110),用于通过根据其它所接收的第一输入信号(IS 1)的调制来调制接收到的本地信号(LS)来产生输出信号。 当这种干涉仪结构(110)以标准模式操作时,本领域已知控制输入信号的功率,使得输出信号的消光比保持最小。 当波长转换器,特别是干涉仪结构(110)以接收两个输入信号的差分模式操作时,本发明还控制输入信号的功率以实现最小消光比。

    Optical receiver and method for chromatic dispersion compensation
    6.
    发明申请
    Optical receiver and method for chromatic dispersion compensation 审中-公开
    光接收机和色散补偿方法

    公开(公告)号:US20060110165A1

    公开(公告)日:2006-05-25

    申请号:US11268627

    申请日:2005-11-08

    IPC分类号: H04B10/12

    CPC分类号: H04B10/25133

    摘要: An optical receiver (5) for an optical network (2) comprises a dispersion compensation module (7) for adjusting an amount of chromatic dispersion of optical signals transmitted through the optical network (2) and is characterized in that a nonlinear optical element (13) for spectral broadening of a dispersion probe signal transmitted through the optical network (2) is arranged in a measuring path (11) downstream of the dispersion compensation module (7), and a power measuring means (15) for measuring an average power of the optical dispersion probe signal over a predetermined frequency range is arranged downstream of the nonlinear optical element (13) in the measuring path (11).

    摘要翻译: 一种用于光网络(2)的光接收机(5)包括色散补偿模块(7),用于调节通过光网络(2)传输的光信号的色散量,其特征在于非线性光学元件(13) )用于通过光网络(2)传输的色散探测信号的频谱展宽布置在色散补偿模块(7)下游的测量路径(11)中,以及功率测量装置(15),用于测量平均功率 在预定频率范围内的光学色散探测信号被布置在测量路径(11)中的非线性光学元件(13)的下游。

    Wavelength converter
    7.
    发明申请
    Wavelength converter 有权
    波长转换器

    公开(公告)号:US20050058458A1

    公开(公告)日:2005-03-17

    申请号:US10937575

    申请日:2004-09-10

    摘要: The invention relates to a wavelength converter for binary optical signals comprising an interferometer structure (110) for generating an output signal by modulating a received local signal (LS) according to the modulation of a further received first input signal (IS1). When such interferometer structures (110) are operated in a standard mode it is known in the art to provide a control means for controlling the power of the input signal such that the extinction ratio of the output signal is kept minimal. The invention provides a modified control means for also achieving the minimal extinction ratio when the wavelength converter and in particular the interferometer structure (110) is operated in a differential mode receiving two input signals.

    摘要翻译: 本发明涉及用于二进制光信号的波长转换器,其包括用于通过根据另外接收到的第一输入信号(IS1)的调制来调制接收到的本地信号(LS)来产生输出信号的干涉仪结构(110)。 当这种干涉仪结构(110)以标准模式操作时,在本领域中已知提供一种用于控制输入信号的功率的控制装置,使得输出信号的消光比保持最小。 本发明提供了一种修改的控制装置,用于当波长转换器,特别是干涉仪结构(110)以接收两个输入信号的差分模式操作时也实现最小的消光比。

    Repairing undersea optical fiber transmission systems using soliton signals with wavelength division multiplexing
    8.
    发明授权
    Repairing undersea optical fiber transmission systems using soliton signals with wavelength division multiplexing 失效
    使用波分复用的孤子信号修复海底光纤传输系统

    公开(公告)号:US06239890B1

    公开(公告)日:2001-05-29

    申请号:US09172854

    申请日:1998-10-15

    申请人: Olivier Leclerc

    发明人: Olivier Leclerc

    IPC分类号: H04J1402

    CPC分类号: H04B10/25077

    摘要: The invention provides a method of repairing an optical fiber transmission system using soliton signals and wavelength division multiplexing, in which the various wavelengths, &lgr;1 to &lgr;n, of the multiplex are selected to ensure that over a given interval ZR, the relative slip between the various channels is substantially equal to a multiple of the bit time, the method comprising the following steps: inserting an additional length of optical fiber in the transmission system; and compensating for the effects of said additional length on the relative slip between the various channels of the multiplex. The invention also provides apparatus for repairing such an optical fiber transmission system using solution signals with wavelength division multiplexing. The invention prevents relative slip between the channels due to inserting an additional length of fiber into the transmission system.

    摘要翻译: 本发明提供一种修复使用孤子信号和波分复用的光纤传输系统的方法,其中多路复用的各种波长lambd1至lambdn被选择以确保在给定的间隔ZR之间,各种 信道基本上等于比特时间的倍数,该方法包括以下步骤:在传输系统中插入附加长度的光纤; 并补偿所述附加长度对多路复用器的各个信道之间的相对滑差的影响。本发明还提供了使用具有波分复用的解信号来修复这种光纤传输系统的装置。 本发明通过将额外长度的光纤插入传输系统来防止通道之间的相对滑动。

    Optical regenerator for high bit rate return-to-zero transmission
    10.
    发明申请
    Optical regenerator for high bit rate return-to-zero transmission 审中-公开
    用于高比特率归零传输的光学再生器

    公开(公告)号:US20050180758A1

    公开(公告)日:2005-08-18

    申请号:US11002139

    申请日:2004-12-03

    CPC分类号: H04B10/299 H04B10/25253

    摘要: It is propose to use a DI-NOLM comprising an optical loop made of two spools of dispersive fibers with large effective area but of local dispersion of opposite sign and a HLN fiber in between. In this configuration according to the invention, the input optical signal needs to be initially chirped. A nonlinear phase shift is then generated between both counter propagating optical fields inside the HNL as the consequence of the peak power imbalance. Advantageously, it is possible to process RZ or RZ/DSPK with a rather large shape at half-way taking even more than 65% of bit time. This can be achieved without any alteration of the optical regeneration. Moreover, in this configuration by using the method according to the invention, the compensation dispersion is realized inside the DI-NOLM, and so it is not necessary to add a compensating dispersion state at this interferometer.

    摘要翻译: 建议使用DI-NOLM,该DI-NOLM包括由两个具有大面积但具有相反符号的局部色散的分散纤维的两个线轴组成的光环路和两个之间的HLN纤维。 在根据本发明的这种配置中,输入光信号需要初始啁啾。 因此,作为峰值功率失衡的结果,在HNL内的两个反向传播光场之间产生非线性相移。 有利的是,可以在半途中以相当大的形状处理RZ或RZ / DSPK,甚至超过65%的位时间。 这可以在没有光学再生的任何改变的情况下实现。 此外,在通过使用根据本发明的方法的该配置中,在DI-NOLM内部实现补偿色散,因此不需要在该干涉仪上添加补偿色散状态。