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    • 62. 发明申请
    • SEMICONDUCTOR LASER FABRICATION
    • 半导体激光制造
    • WO1987006398A1
    • 1987-10-22
    • PCT/US1987000279
    • 1987-02-06
    • BELL COMMUNICATIONS RESEARCH, INC.
    • BELL COMMUNICATIONS RESEARCH, INC.YABLONOVITCH, Eli
    • H01S03/19
    • B82Y20/00H01S5/34306H01S5/34313
    • A method of making a semiconductor laser from a gallium arsenide substrate of a first conductivity type by depositing a first layer of semiconductor material having the composition AlxGal-xAs of first conductivity type on the substrate and a thin second layer of semiconductor material for quantum confinement having the composition InyGa1-yAs on the first layer. This layer experiences sufficient strain in the semiconductor structure so as to minimize the threshold current density. The device is completed by depositing a third layer of semiconductor material having the composition AlxGal-xAs and of second conductivity type on the second layer, and depositing a fourth layer of semiconductor material having the composition GaAs and of second conductivity type on the third layer.
    • 一种通过在衬底上沉积具有第一导电类型的组成Al x Ga 1-x As的第一半导体材料层和用于量子限制的薄的第二半导体材料层来制造具有第一导电类型的砷化镓衬底的半导体激光器的方法, 组成InyGa1-yAs在第一层。 该层在半导体结构中经历足够的应变,以便使阈值电流密度最小化。 通过在第二层上沉积具有组成Al x Ga 1-x As和第二导电类型的第三层半导体材料并在第三层上沉积具有组成为GaAs并具有第二导电类型的第四层半导体材料来完成该器件。
    • 64. 发明申请
    • SYSTEM AND METHOD FOR EQUALIZING DELAY IN A DYNAMIC PACKET SWITCHING NETWORK
    • 用于在动态分组交换网络中均衡化延迟的系统和方法
    • WO1998053577A1
    • 1998-11-26
    • PCT/US1997008688
    • 1997-05-22
    • BELL COMMUNICATIONS RESEARCH, INC.
    • BELL COMMUNICATIONS RESEARCH, INC.CISNEROS, Arturo
    • H04L12/56
    • H04L12/5601H04L45/10H04L45/22H04L2012/5619H04L2012/562H04L2012/5649H04L2012/5681H04Q11/0478
    • A system and method for equalizing delay in a dynamic packet switching network using transmit and receive buffers. The network includes a plurality of user access stations each equipped with a transmit buffer (TB1, TB2) and a receive buffer (RB1, RB2), and plurality of switches (Sc) and communication links interconnecting the user access stations (UAS1, UAS2). A control station (CC1) having communication links to the switches (Sc) and user access stations (UAS1) operates to set up and change transmission paths between the user access stations, and to control the buffers in the user access stations to equalize packet transmission delay through the network and to eliminate packet rate doubling upon changing transmission paths. The system also includes a buffer shifting feature whereby a controlled buffering in a transmitting user access station is gradually shifted to a buffer in a receiving user access station during a period of time following a change from a longer transmission path to a shorter transmission path.
    • 一种使用发送和接收缓冲器来均衡动态分组交换网络中的延迟的系统和方法。 网络包括各自配备有发送缓冲器(TB1,TB2)和接收缓冲器(RB1,RB2)的多个用户接入站以及将用户接入站(UAS1,UAS2)互连的多个交换机(Sc)和通信链路, 。 具有到交换机(Sc)和用户接入站(UAS1)的通信链路的控制站(CC1)操作以建立和改变用户接入站之间的传输路径,并且控制用户接入站中的缓冲器以均衡分组传输 通过网络延迟,并且在改变传输路径时消除分组速率倍增。 该系统还包括缓冲移位特征,由此在从更长的传输路径到更短的传输路径的改变之后的时间段内,在发送用户接入站中的受控缓冲逐渐移动到接收用户接入站中的缓冲区。
    • 69. 发明申请
    • METHOD AND APPARATUS FOR MONITORING THE STATE OF A LIQUID-CRYSTAL POLARIZATION MODULATOR
    • 用于监测液晶极化调制器状态的方法和装置
    • WO1997045711A1
    • 1997-12-04
    • PCT/US1997008820
    • 1997-05-27
    • BELL COMMUNICATIONS RESEARCH, INC.
    • BELL COMMUNICATIONS RESEARCH, INC.TOMILSON, W., John, IIIWAGNER, Richard, E.
    • G01J04/00
    • G02F1/31G01J4/04
    • A liquid crystal (LC) polarization modulator segment (216, 218) includes a monitoring device (220). The monitoring device (220) includes a polarized reference light source (222), located at an LC polarization monitor input, and polarized light detector (224), located at an LC polarization monitor output. If the reference light having the correct polarization is received at the detector (224), an indication of the switch state is provided. Alternatively, if the polarized detector (224) includes orthogonal polarizers (230A, 230B) provided for two separate light detectors (232A, 232B) both the desired polarization, and the opposite polarization, may be monitored to determine whether a failure exists in the segment. If the reference light is detected having the opposite polarization (instead of or in addition to the correct polarization) or no light is detected, the segment (or the monitor) is not operating correctly.
    • 液晶(LC)偏振调制器段(216,218)包括监视装置(220)。 监视装置(220)包括位于LC偏振监视器输入处的偏振参考光源(222)和位于LC偏振监视器输出处的偏振光检测器(224)。 如果在检测器(224)处接收到具有正确极化的参考光,则提供开关状态的指示。 或者,如果偏振检测器(224)包括为两个单独的光检测器(232A,232B)提供的正交偏振器(230A,230B),则可以监视期望的极化和相反极化,以确定是否存在该段中的故障 。 如果检测到参考光具有相反的偏振(代替或除正确的偏振之外)或没有检测到光,则该段(或监视器)不能正确地操作。