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1. 发明授权

US06411235B1 Dynamic range extension with gain correction 有权
标题翻译：动态范围扩展与增益校正
公开(公告)号：US06411235B1
公开(公告)日：2002-06-25
申请号：US09602747
申请日：2000-06-23
申请人： Aravanan Gurusami , Joseph F. Chiappetta , Niranjan Samant , Donald T. Wesson
发明人： Aravanan Gurusami , Joseph F. Chiappetta , Niranjan Samant , Donald T. Wesson
IPC分类号： H03M162
CPC分类号： H04W52/52 , H03G3/3036
摘要： A method for controlling gain in a network is provided. The method includes receiving signals for transmission over a network and adjusting the level of the received signals. The method further includes inserting an additional signal indicative of the level adjustment and transmitting the signals and the additional signal over the network. The method also includes extracting the additional signal after transmission over the network and compensating for the level adjustment based on the extracted signal.
摘要翻译：提供了一种用于控制网络中的增益的方法。该方法包括接收通过网络传输的信号并调整接收信号的电平。该方法还包括插入指示电平调整的附加信号，并通过网络发送信号和附加信号。该方法还包括在通过网络传输之后提取附加信号，并且基于提取的信号补偿电平调整。

2. 发明授权

US06643471B2 Increased transmission capacity for a fiber-optic link 有权
公开(公告)号：US06643471B2
公开(公告)日：2003-11-04
申请号：US09824433
申请日：2001-04-02
申请人： Aravanan Gurusami , Joseph F. Chiappetta
发明人： Aravanan Gurusami , Joseph F. Chiappetta
IPC分类号： H04B1004
CPC分类号： H04L25/49 , H04B10/6931
摘要： An optical communication system is provided. The optical communication system includes an optical fiber, an optical transmitter, and an optical receiver. The optical transmitter is coupled to the optical fiber. The optical transmitter is adapted to encode a pulse amplitude modulated optical signal based on at least two, independent input signals. The optical receiver is coupled to the optical fiber. The optical receiver is adapted to decode the pulse amplitude modulated optical signal to reproduce the at least two, independent input signals as output signals.

3. 发明授权

US06963697B2 Increased transmission capacity for a fiber-optic link 有权
公开(公告)号：US06963697B2
公开(公告)日：2005-11-08
申请号：US10696025
申请日：2003-10-29
申请人： Aravanan Gurusami , Joseph F. Chiappetta
发明人： Aravanan Gurusami , Joseph F. Chiappetta
IPC分类号： H04B10/152 , H04L25/49 , H04B10/06
CPC分类号： H04L25/49 , H04B10/6931
摘要： A method of decoding a signal in an optical fiber. In one embodiment the method includes receiving the optical signal, wherein the optical signal is a pulse amplitude modulated signal. Converting the optical signal to an electrical signal. Comparing the electrical signal with a plurality of levels. Producing comparison output signals based on the comparison of the electrical signal with the plurality of levels. Processing the comparison output signals on a clock to produce processed output signals and latching the processed output signals on a clock signal to generate the plurality of serial, digital data streams.

4. 发明授权

US06690506B2 Control architecture and method for optical amplifiers 失效
标题翻译：光放大器的控制架构和方法
公开(公告)号：US06690506B2
公开(公告)日：2004-02-10
申请号：US09945153
申请日：2001-08-31
申请人： Timothy Zahnley , Aravanan Gurusami , Timothy W. T. Qian , Muhidin Lelic
发明人： Timothy Zahnley , Aravanan Gurusami , Timothy W. T. Qian , Muhidin Lelic
IPC分类号： H01S316
CPC分类号： H04B10/296 , H04B10/077 , H04B10/07955 , H04B10/2931 , H04B2210/003
摘要： According to an illustrative embodiment of the present invention, a method for controlling an optical amplifier is disclosed. The illustrative method includes receiving a portion of an input signal to the optical amplifier; receiving a portion of an output signal from a first amplification stage; receiving a portion of an output signal of the optical amplifier; and adjusting the first amplification stage and a second amplification stage based on the received portions to substantially control the optical amplifier. According to another illustrative embodiment of the present invention, an optical amplifier includes a controller which receives a portion of an output signal from a first amplification stage and a portion of an output signal from the optical amplifier. The controller adjusts the first amplification stage and a second amplification stage based on the received portions of the signals.
摘要翻译：根据本发明的说明性实施例，公开了一种用于控制光放大器的方法。说明性方法包括：将一部分输入信号接收到光放大器; 从第一放大级接收输出信号的一部分; 接收光放大器的输出信号的一部分; 并且基于所接收的部分调整第一放大级和第二放大级，以基本上控制光放大器。根据本发明的另一说明性实施例，光放大器包括控制器，其接收来自第一和第二放大级的输出信号的一部分放大级和来自光放大器的输出信号的一部分。控制器基于接收的信号部分来调节第一放大级和第二放大级。

5. 发明授权

US6031846A Method and apparatus for improved time division multiple access (TDMA) communication 失效
标题翻译：用于改进时分多址（TDMA）通信的方法和装置
公开(公告)号：US6031846A
公开(公告)日：2000-02-29
申请号：US761573
申请日：1996-12-06
申请人： Aravanan Gurusami , Mike Nekhamkin , R. Gary Heyman
发明人： Aravanan Gurusami , Mike Nekhamkin , R. Gary Heyman
IPC分类号： H04J3/06 , H04L7/08 , H04L7/10 , H04N7/173 , H04N21/242 , H04N21/437 , H04N21/61
CPC分类号： H04J3/0682 , H04N21/242 , H04N21/437 , H04N21/6118 , H04N21/6168 , H04N7/173 , H04J3/0632 , H04L7/08
摘要： An improved method for Time Division Multiple Access (TDMA) communications particularly applicable to a network comprising transmitters having significantly different transmission paths to a common receiver. The common receiver measures the response time from each transmitter, relative to a common time reference, then instructs each transmitter to delay all subsequent responses by an amount specific to each transmitter, as determined from these measured response times. This imposed delay results in a more time efficient TDMA protocol, improved error detection capability, and improved security capabilities. This invention is particularly applicable to bi-directional communications to and from a provider of Cable TV, Telephony, and Data Services.
摘要翻译：一种用于时分多址（TDMA）通信的改进方法，特别适用于包括具有到普通接收机的传输路径明显不同的发射机的网络。公共接收机相对于公共时间基准测量来自每个发射机的响应时间，然后根据这些测量的响应时间确定每个发射机延迟所有后续响应一定量的每个发射机的量。这种施加的延迟导致更节省时间的TDMA协议，改进的错误检测能力和改进的安全能力。本发明特别适用于与有线电视，电话和数据服务的提供商的双向通信。

6. 发明授权

US5557319A Subscriber return system for CATV full service networks 失效
标题翻译：用于CATV全业务网络的用户返回系统
公开(公告)号：US5557319A
公开(公告)日：1996-09-17
申请号：US366341
申请日：1994-12-28
申请人： Aravanan Gurusami , Mark Chapman , John G. Staiger
发明人： Aravanan Gurusami , Mark Chapman , John G. Staiger
IPC分类号： H04N7/173
CPC分类号： H04N7/17309
摘要： A subscriber premise local bus (SPLB) is connected to a cable drop from a wide-band 2-way network through a gateway device providing frequency conversion and blocking of certain frequencies used in the subscriber premises local bus (SPLB). Service channels to the consumer are provided in a first band such as 54 to 750 MHZ, carried unchanged over the SPLB. Return signals from the subscriber are generated at subscriber devices, such as TV, computers, etc. at, or are up-converted to, signals in a higher frequency band, such as 900 to 950 Mhz, for transmission on the SPLB to the gateway device where they are down-converted to frequencies below 54 Mhz for transmission over the network. A band-pass or other filter may block at least some of the lower frequencies from carrying over from the SPLB to the cable drop or 2-way network.
摘要翻译：用户驻地本地总线（SPLB）通过网关设备从宽带双向网络连接到电缆线路提供用户驻地本地总线（SPLB）中使用的某些频率的频率转换和阻塞。向消费者提供的服务通道位于第一频段，如54至750MHz，在SPLB上保持不变。来自订户的返回信号在诸如TV，计算机等的用户设备处生成，或者被上变频到更高频带（例如900到950Mhz）的信号，用于在SPLB上传输到网关它们被下变频到低于54Mhz的频率，以便通过网络进行传输。带通或其他滤波器可以阻挡较低频率中的至少一些从SPLB向电缆掉线或双向网络传输。

7. 发明授权

US07110167B2 System and method for dynamic range extension and stable low power operation of optical amplifiers using pump laser pulse modulation 有权
标题翻译：使用泵激光脉冲调制的光放大器的动态范围扩展和稳定低功耗操作的系统和方法
公开(公告)号：US07110167B2
公开(公告)日：2006-09-19
申请号：US10896611
申请日：2004-07-20
申请人： Aravanan Gurusami , Dragan Pikula , Daniel O. Ricketts , Scott R. Dahl , Monica K. Davis
发明人： Aravanan Gurusami , Dragan Pikula , Daniel O. Ricketts , Scott R. Dahl , Monica K. Davis
IPC分类号： H01S3/0941
CPC分类号： H01S3/094003 , H01S3/06754 , H01S3/094076 , H01S5/0652
摘要： An optical amplifier system comprises an optical gain medium receiving an input optical signal and outputting an amplified optical signal and a pump laser optically coupled to an input of the optical gain medium, wherein the pump laser emits a series of pulses to the optical gain medium, the pulses being emitted during coherence collapse operation of the pump laser, the time between pulses being shorter than an excited state lifetime of the optical gain medium.
摘要翻译：光学放大器系统包括光学增益介质，其接收输入光信号并输出放大的光信号和与光学增益介质的输入光学耦合的泵浦激光器，其中泵浦激光器向光学增益介质发射一系列脉冲，在泵浦激光器的相干塌陷操作期间发射的脉冲，脉冲之间的时间短于光学增益介质的激发态寿命。

8. 发明申请

US20050147418A1 Increased transmission capacity for a fiber-optic link 有权
标题翻译：增加光纤链路的传输容量
公开(公告)号：US20050147418A1
公开(公告)日：2005-07-07
申请号：US10696025
申请日：2003-10-29
申请人： Aravanan Gurusami , Joseph Chiappetta
发明人： Aravanan Gurusami , Joseph Chiappetta
IPC分类号： H04B10/152 , H04L25/49 , H04B10/06
CPC分类号： H04L25/49 , H04B10/6931
摘要： A method of decoding a signal in an optical fiber. In one embodiment the method includes receiving the optical signal, wherein the optical signal is a pulse amplitude modulated signal. Converting the optical signal to an electrical signal. Comparing the electrical signal with a plurality of levels. Producing comparison output signals based on the comparison of the electrical signal with the plurality of levels. Processing the comparison output signals on a clock to produce processed output signals and latching the processed output signals on a clock signal to generate the plurality of serial, digital data streams.
摘要翻译：一种对光纤中的信号进行解码的方法。在一个实施例中，该方法包括接收光信号，其中光信号是脉冲幅度调制信号。将光信号转换为电信号。将电信号与多个电平进行比较。基于电信号与多个电平的比较产生比较输出信号。处理时钟上的比较输出信号以产生经处理的输出信号，并将经处理的输出信号锁存在时钟信号上以产生多个串行数字数据流。

9. 发明授权

US5764707A Method and apparatus for improved phase shift keyed (PSK) signal demodulation 失效
标题翻译：用于改进相移键控（PSK）信号解调的方法和装置
公开(公告)号：US5764707A
公开(公告)日：1998-06-09
申请号：US762642
申请日：1996-12-09
申请人： Aravanan Gurusami , Mike Nekhamkin
发明人： Aravanan Gurusami , Mike Nekhamkin
IPC分类号： H04L27/22 , H04L7/033 , H04L27/233
CPC分类号： H04L27/2338 , H04L7/0334 , H04L7/0337
摘要： An improved method for signal demodulation, based upon the assessment of an error statistic which is independent of the content of the data stream. To determine the appropriate sampling point within a data period, multiple sampling points are utilized to generate a set of alternative decodings of the data stream. Associated with each of these alternative sets is an error statistic which is computed based upon a known characteristic of the transmitted stream. For example, in Differential QPSK, the encoded phase change is known to be a multiple of 90 degrees. The error statistic would be a function of the difference between each sampled phase and the nearest multiple of 90 degrees. This error statistic provides a quantifiable measure of quality and noise margin associated with each sampling point. The decoded stream associated with the error statistic of highest quality is then selected as the proper decoding of the transmitted data stream. This invention is particularly well suited for processing small data packets, such as ATM.
摘要翻译：一种用于信号解调的改进方法，其基于与数据流的内容无关的误差统计量的评估。为了确定数据周期内的适当采样点，利用多个采样点来生成数据流的替代解码集合。与这些替代集合中的每一个相关联的是基于所发送的流的已知特性来计算的误差统计量。例如，在差分QPSK中，已知编码的相位变化是90度的倍数。误差统计量将是每个采样相位与90度的最近倍数之间的差值的函数。该误差统计量提供了与每个采样点相关联的质量和噪声容限的量化度量。然后选择与最高质量的错误统计量相关联的解码流作为发送数据流的适当解码。本发明特别适用于处理诸如ATM之类的小数据分组。

10. 发明授权

US08731403B2 Multicast optical switch 有权
标题翻译：组播光交换机
公开(公告)号：US08731403B2
公开(公告)日：2014-05-20
申请号：US13368254
申请日：2012-02-07
申请人： Massimo Martinelli , Manish Sharma , Ruipeng Sun , Mark H. Garrett , Aravanan Gurusami
发明人： Massimo Martinelli , Manish Sharma , Ruipeng Sun , Mark H. Garrett , Aravanan Gurusami
IPC分类号： H04J14/00 , H04J14/02
CPC分类号： G02B27/283 , G02B6/2817 , G02B6/3512 , G02B6/3518 , G02B6/3546 , G02B2006/1215
摘要： A multicast optical switch includes a free-space optical assembly of discrete splitters, cylindrical optics, and a linear array of reflective switching devices, such as microelectromechanical systems (MEMS) mirrors, to provide low-loss, high-performance multicast switching in a compact configuration. The assembly of optical splitters may include multiple planar lightwave circuit splitters or a multi-reflection beam splitter that includes a linear array of partially reflecting mirrors, each of a different reflectivity.
摘要翻译：组播光学交换机包括离散分离器的自由空间光学组件，圆柱形光学器件和诸如微机电系统（MEMS）反射镜的反射式开关器件的线性阵列，以在紧凑的情况下提供低损耗，高性能的多播切换组态。光分路器的组件可以包括多个平面光波分路器或多反射分束器，其包括具有不同反射率的部分反射镜的线性阵列。

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