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    • 1. 发明申请
    • SYSTEM FOR PASSIVE SCRAMBLING AND UNSCRAMBLING OF AN OPTICAL SIGNAL
    • 被动扫描系统和光信号的解码
    • WO2008143982A1
    • 2008-11-27
    • PCT/US2008/006300
    • 2008-05-16
    • CORNING INCORPORATEDKUKSENKOV, Dmitri, V.LI, ShenpingNOLAN, Daniel, A.
    • KUKSENKOV, Dmitri, V.LI, ShenpingNOLAN, Daniel, A.
    • H04B10/13H04L9/00
    • H04B10/85H04B10/2581
    • A system for passively scrambling and unscrambling a, pulse optical signal transmitted through a multi-mode optical fiber is provided. The system includes a scrambling unit connected between a signal receiving end of said transmission fiber and an optical signal source that includes an optical fiber which creates a differential delay between two groups of optical modes of the signal that is at least one bit period long such that said optical signal is passively scrambled, and an unscrambling unit connected to a signal transmitting end of said transmission fiber having an optical fiber that counteracts said differential delay between said two groups of optical modes of the signal such that said optical signal is passively unscrambled. The scrambling unit optical fiber has an alpha profile with a complementary perturbation that creates the differential delay between two groups of optical modes of the signal, and the unscrambling unit optical fiber has an alpha profile with reversal complementary perturbation that counteracts the differential delay between said two groups of optical modes of the signal. Alternatively, the scrambling and unscrambling units may have the combination of a mode splitter that splits the signal into two different groups of optical modes, and a pair of optical fibers that conduct the two groups of optical modes in parallel, the fibers being of different lengths to create or to counteract a differential delay in the two groups of modes.
    • 提供一种用于被动加扰和解扰通过多模光纤传输的脉冲光信号的系统。 该系统包括连接在所述传输光纤的信号接收端和光信号源之间的加扰单元,所述光信号源包括光纤,该光纤在至少一位周期长的信号的两组光模之间产生差分延迟,使得 所述光信号被无源加扰,并且一个解扰单元连接到具有光纤的所述传输光纤的信号发送端,该光纤抵消所述信号的所述两组光模之间的所述差分延迟,使得所述光信号被被动地解扰。 加扰单元光纤具有具有互补扰动的α分布,其产生信号的两组光模式之间的差分延迟,并且解扰单元光纤具有反转互补扰动的α分布,其抵消所述两个 信号组的光模式。 或者,加扰和解扰单元可以具有将信号分解成两个不同组的光模式的模式分离器的组合,以及并行地传导两组光学模式的一对光纤,所述光纤具有不同长度 以创建或抵消两组模式中的差分延迟。
    • 3. 发明申请
    • OPTICAL WAVEGUIDE FIBER FOR LOCAL ACCESS
    • 用于本地访问的光波导光纤
    • WO2003012501A1
    • 2003-02-13
    • PCT/US2002/019198
    • 2002-06-17
    • CORNING INCORPORATED
    • DIEP, PhongFAJARDO, James CLI, Ming-JunNOLAN, Daniel, A.QI, Gang
    • G02B6/22
    • G02B6/03666G02B6/02014G02B6/02223G02B6/02266G02B6/0281G02B6/03611G02B6/03627H04B10/25
    • Disclosed is a single mode optical waveguide fiber having a low cut off wavelength, and mode field diameter and bend resistance similar to step index single mode optical waveguide fiber designed for use at 1310 nm. By including a clad region of raised refractive index spaced apart from the core region of the single mode optical waveguide fiber, the cut off wavelength can be reduced to 850 nm. The single mode optical waveguide fiber in accord with the invention may also have a core region having a reduced refractive index on centerline surrounded by a region of higher refractive index and a clad region which is substantially uniform. The single mode optical waveguide fiber is thus ideally suited for use with the low cost, reliable VCSEL operating at 850 nm, a Fabry-Perot laser operating at 1310 nm, or a distributed feedback laser operating at 1550 nm thereby enabling low cost, easily installed, home access portions of the broadband telecommunications system.
    • 公开了一种具有低截止波长和模场直径和弯曲电阻的单模光纤光纤,类似于在1310nm使用的阶跃折射率单模光纤。 通过包括与单模光波导光纤的芯区间隔开的升高折射率的包层区域,截止波长可以降低到850nm。 根据本发明的单模光波导纤维还可以具有在由折射率较高的区域围绕的中心线处的折射率降低的芯区域和基本均匀的包层区域。 因此,单模光纤光纤非常适用于在850nm工作的低成本,可靠的VCSEL,工作在1310nm的法布里 - 珀罗激光器或在1550nm下工作的分布式反馈激光器,从而实现低成本,易于安装 ,宽带电信系统的家庭接入部分。
    • 7. 发明申请
    • MACH-ZEHNDER SWITCH
    • MACH-ZEHNDER开关
    • WO1996042027A1
    • 1996-12-27
    • PCT/US1996007648
    • 1996-05-23
    • CORNING INCORPORATED
    • CORNING INCORPORATEDMILLER, William, J.NOLAN, Daniel, A.
    • G02B06/26
    • G02F1/3517G02B6/2835G02B6/29352G02B2006/12145G02F1/3131G02F1/3136
    • A compact monolithic Mach-Zehnder switch is formed such that one of the waveguide paths (69, 70) between the input and output couplers (67, 68) contains a material which exhibits a resonant nonlinearity, whereby its refractive index changes when pump power propagates through it. Each of the waveguide paths (69, 70) has a different propagation constant whereby signal light is subjected to a different delay in each path when no pump power is propagating through the rare nonlinear path. An input signal applied to the input (71, 72) of the switch appears at a first output terminal (73, 74) when the pump power does not propagate through the nonlinear path, and it appears at a second output terminal (73, 74) when the pump power is applied to the nonlinear path. Switching occurs at relatively low levels of pump power.
    • 形成紧凑的单片马赫 - 策德尔开关,使得输入和输出耦合器(67,68)之间的波导路径(69,70)中的一个包含呈现谐振非线性的材料,由此当泵浦功率传播时其折射率改变 通过它。 每个波导路径(69,70)具有不同的传播常数,由此当没有泵浦功率传播通过罕见的非线性路径时,信号光在每个路径中经受不同的延迟。 当泵浦功率不通过非线性路径传播时,施加到开关的输入端(71,72)的输入信号出现在第一输出端子(73,74)处,并且出现在第二输出端子(73,74) )当泵功率施加到非线性路径时。 切换发生在泵功率相对较低的水平。