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    • 1. 发明申请
    • LASER WAVELENGTH STABILIZATION
    • 激光波长稳定
    • WO2007011803A3
    • 2007-05-31
    • PCT/US2006027534
    • 2006-07-18
    • MRV COMMUNICATIONS INCZHANG SHENG ZMARGALIT NEARAZADEH MOHAMMAD
    • ZHANG SHENG ZMARGALIT NEARAZADEH MOHAMMAD
    • H01S5/00
    • H01S5/06804
    • In a coarse wavelength division multiplexing (CWDM) optical transmission system, a distributed feedback (DFB) laser is tuned so that the peak reflection of the grating overlaps with the gain range of the DFB laser. The diffraction grating is tuned so that the peak is positioned on the long wavelength end of the gain spectrum at a selected temperature. The optical transmission system operates in an environment having a wide temperature range (i.e., about -40°C to about 85°C). Heat is applied to the laser and as the laser temperature increases, the gain range overtakes the grating peak. When the gain range and the grating peak overlap at increased laser temperature, laser output is improved.
    • 在粗波分复用(CWDM)光传输系统中,调谐分布式反馈(DFB)激光器,使得光栅的峰值反射与DFB激光器的增益范围重叠。 对衍射光栅进行调谐,使得峰位于选定温度下增益光谱的长波长端。 光传输系统在具有宽温度范围(即,大约-40℃至大约85℃)的环境中工作。 对激光器施加热量,随着激光器温度的升高,增益范围会超过光栅峰值。 当增益范围和光栅峰值在增加的激光温度下重叠时,激光输出得到改善。
    • 3. 发明申请
    • AUTOMATIC GAIN CONTROL
    • 自动增益控制
    • WO2007014299A2
    • 2007-02-01
    • PCT/US2006029259
    • 2006-07-25
    • MRV COMMUNICATIONS INCMARGALIT NEARREGEV ZVI
    • MARGALIT NEARREGEV ZVI
    • H04L27/06
    • H03G3/3084H04B10/691
    • A method and apparatus is presented for providing improved responsiveness of a receiver device. One embodiment includes a receiver device including an avalanche photodiode (APD), a transimpedance amplifier (TIA), and an automatic gain control (AGC) device configured to adjust the reverse bias voltage applied to the APD according to an approximate DC average of the incoming optical signal. A switch in the AGC device may be used to increase or decrease the time constant of an RC combination determining the DC averaging time period, thereby tailoring the response of the AGC device to characteristics of the incoming data pattern. The resulting receiver exhibits improved responsiveness and sensitivity by adapting to varying data patterns including those with data bursts interspersed with gaps.
    • 提出了一种用于提供接收机设备的改善的响应性的方法和设备。 一个实施例包括包含雪崩光电二极管(APD),跨阻放大器(TIA)和自动增益控制(AGC)装置的接收器装置,其被配置为根据输入的近似DC平均值来调整施加到APD的反向偏置电压 光信号。 AGC装置中的开关可用于增加或减少确定DC平均时间周期的RC组合的时间常数,由此调整AGC装置对输入数据模式的特性的响应。 所得到的接收机通过适应不同的数据模式,包括散布有间隙的数据突发的数据模式,表现出改进的响应性和灵敏度。
    • 9. 发明申请
    • DYNAMICALLY SWITCHABLE, ENCRYPTION-ADAPTABLE AND MONITORED, HIGH SPEED, HIGH CAPACITY NETWORKS, METHODS, MODULES AND SYSTEMS, UTILIZING MULTIPLE AND VARIABLE PATH TRANSMISSION AND BREACH DETECTION CAPABILITIES
    • 动态可切换,加密可适应和监控,高速,高容量网络,方法,模块和系统,利用多路可变路径传输和突破检测能力
    • WO2011028265A2
    • 2011-03-10
    • PCT/US2010002371
    • 2010-08-30
    • MRV COMMUNICATIONS INC
    • GANON EDNADRAER ZEEVGENNOSAR CHENAVIDAN GUY
    • H04L12/22H04L9/30
    • H04L63/0428H04L63/061
    • Methods, networks, devices, apparatus, software, firmware, hardware, systems, business methods and combinations thereof for providing the high speed, high capacity encryption and transmission of digital data over many types of communications networks and systems are provided. A significant increase is realized in the security of encrypted data transfer from a sender to a receiver over a network which uses a public key algorithm for the encryption/decryption process. In a key aspect, a sender transfers the public key to the receiver over a network on a different route or virtual path than the route or virtual path that is used to send the encrypted data itself. When a plurality or numerous routes or virtual paths are available, the invention is adapted and arranged to dynamically change the available routes and virtual paths over which it sends the encrypted key and the encrypted data, thereby improving the level of security even more significantly. The invention is particularly effective and useful as a part of networks and other communications systems comprising one or more physical links, and especially those which utilize one or more optical fibers, such as Ethernet and other communications networks.
    • 提供了用于在多种类型的通信网络和系统上提供数字数据的高速,高容量加密和传输的方法,网络,设备,装置,软件,固件,硬件,系统,商业方法及其组合。 通过使用公钥算法进行加密/解密处理的网络,从发送者到接收者的加密数据传输的安全性得到显着提高。 在一个关键方面,发送方通过网络在与用于发送加密数据本身的路由或虚拟路径不同的路由或虚拟路径上将公钥传输到接收方。 当多个或多个路线或虚拟路径可用时,本发明适于并安排为动态地改变其发送加密密钥和加密数据的可用路由和虚拟路径,由此甚至更显着地提高安全级别。 本发明作为包括一个或多个物理链路的网络和其他通信系统的一部分,特别是那些利用一个或多个光纤(例如以太网和其他通信网络)的部分是特别有效和有用的。
    • 10. 发明申请
    • SIGNAL PRESENCE DETECTOR
    • 信号存在检测器
    • WO2007014243A8
    • 2007-12-27
    • PCT/US2006028967
    • 2006-07-25
    • MRV COMMUNICATIONS INCREGEV ZVI
    • REGEV ZVI
    • H04B10/00H04L7/00H04L7/04H04L27/00H04L27/06H04M1/64
    • H03F3/217H03F2200/78H03K5/125H03K5/19H04L25/45
    • A signal presence detection device (500) has a first reference voltage generation device in the form of a first voltage divider, a second referenc voltage generation device in the form of a second voltage divider and a third reference voltage generation deivce in the form of a third voltage divider. The detection device also has a signal conditioning device (508) such as a hysteretic amplifier with an output that is coupled to the first and second voltage dividers. A comparison device is coupled to all three voltage dividers to compare a voltage of the first voltage divider to a voltage of the third voltage divider and to compare a voltage of the second voltage divider to the voltage of the third voltage divider. The comparison device is coupled at two outputs thereof to two respective inputs of an XOR device (514). The XOR device receives respective signals from the first and second outputs of the comparison device and produces a signal presence output that serves to indicate whether an incoming signal is present or absent.
    • 信号存在检测装置(500)具有第一分压器形式的第一参考电压产生装置,第二分压器形式的第二参考电压产生装置和第三参考电压产生装置 第三分压器。 检测装置还具有信号调节装置(508),例如具有耦合到第一和第二分压器的输出的迟滞放大器。 比较装置耦合到所有三个分压器,以将第一分压器的电压与第三分压器的电压进行比较,并将第二分压器的电压与第三分压器的电压进行比较。 比较装置在其两个输出处耦合到XOR装置(514)的两个相应的输入端。 XOR设备从比较设备的第一和第二输出接收相应的信号,并产生用于指示输入信号是存在还是不存在的信号存在输出。