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36 条记录 (耗时 0.017 秒)

    Reach extension by using external Bragg grating for spectral filtering
    1.
    发明授权
    Reach extension by using external Bragg grating for spectral filtering 有权
    通过使用外部布拉格光栅进行光谱滤波达到延伸

    公开(公告)号：US07558488B2

    公开(公告)日：2009-07-07

    申请号：US11093461

    申请日：2005-03-30

    申请人： Yasuhiro Matsui ,  Parvis Tayebati ,  Kevin McCallion

    发明人： Yasuhiro Matsui ,  Parvis Tayebati ,  Kevin McCallion

    IPC分类号： H04B10/06

    CPC分类号： H04B10/504

    摘要： A fiber optic system comprising a modulated signal source coupled to a spectral filtering element characterized in that the bandwidth of the optical spectrum of the signal after the spectral filtering element is reduced relative to the optical bandwidth of the spectrum before the filtering element.

    摘要翻译： 一种光纤系统，包括耦合到频谱滤波元件的调制信号源，其特征在于频谱滤波元件之后的信号的光谱的带宽相对于滤波元件之前的频谱的光带宽减小。

    WDM PON based on DML
    4.
    发明授权
    WDM PON based on DML 有权
    基于DML的WDM PON

    公开(公告)号：US07991291B2

    公开(公告)日：2011-08-02

    申请号：US12028675

    申请日：2008-02-08

    申请人： Yasuhiro Matsui ,  Kevin McCallion

    发明人： Yasuhiro Matsui ,  Kevin McCallion

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

    CPC分类号： H04J14/0226 ,  H04B10/272 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282

    摘要： Low-cost FP lasers can be implemented in the upstream links of a WDM PON system by configuring them for single-mode operation. In a typical embodiment, an FP laser at a subscriber unit is injection seeded with CW seed light from a DFB laser or an ASE source at a central office to enable single-mode operation of the FP laser. The FP laser is directly modulated and the resulting optical data signal is transmitted upstream to the central office. At the central office, an optical spectrum reshaper/bandpass optical filter is positioned in front of an optical receiver to enhance the extinction ratio of the optical data signal and generate a vestigial sideband. A wavelength locker can also be implemented at the central office to stabilize the wavelength of the master DFB laser and the injection-seeded FP laser.

    摘要翻译： 低成本FP激光器可以通过将其配置为单模操作在WDM PON系统的上游链路中实现。 在典型的实施例中，在用户单元处的FP激光器用来自DFB激光器的CW种子光或在中心局的ASE光源注入，以实现FP激光器的单模操作。 FP激光器被直接调制，所得到的光学数据信号在上游传输到中心局。 在中央办公室，光谱整形/带通滤光器位于光接收器的前面，以增强光数据信号的消光比并产生残留边带。 还可以在中心局实现波长锁定器，以稳定主DFB激光器和注射种子FP激光器的波长。

    Optical differential phase-shift keyed signal demodulator
    9.
    发明授权
    Optical differential phase-shift keyed signal demodulator 有权
    光差分相移键控信号解调器

    公开(公告)号：US08411351B2

    公开(公告)日：2013-04-02

    申请号：US13534276

    申请日：2012-06-27

    申请人： Kevin McCallion ,  Xueyan Zheng

    发明人： Kevin McCallion ,  Xueyan Zheng

    IPC分类号： G02F2/00 ,  G02F1/35

    CPC分类号： H04L27/223 ,  G02F2/00 ,  H04B10/677 ,  H04L27/2071

    摘要： A phase-shift keyed signal demodulator and method for demodulating is disclosed. An example demodulator includes N filters that receive inputs from a splitter and include transmission functions offset from one another. N pairs of photodiodes receive the transmitted and reflected beams from each filter and a decoder converts the outputs of the pairs of photodiodes to one or more data symbols.

    摘要翻译： 公开了一种用于解调的相移键控信号解调器和方法。 示例解调器包括N个滤波器，其接收来自分路器的输入并且包括彼此偏移的传输函数。 N对光电二极管接收来自每个滤波器的发送和反射光束，并且解码器将该对光电二极管的输出转换成一个或多个数据符号。