公开(公告)号：US06690506B2

公开(公告)日：2004-02-10

申请号：US09945153

申请日：2001-08-31

Applicant: Timothy Zahnley ,  Aravanan Gurusami ,  Timothy W. T. Qian ,  Muhidin Lelic

Inventor： Timothy Zahnley ,  Aravanan Gurusami ,  Timothy W. T. Qian ,  Muhidin Lelic

IPC: H01S316

CPC classification number: H04B10/296 ,  H04B10/077 ,  H04B10/07955 ,  H04B10/2931 ,  H04B2210/003

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US6031846A

公开(公告)日：2000-02-29

申请号：US761573

申请日：1996-12-06

Applicant: Aravanan Gurusami ,  Mike Nekhamkin ,  R. Gary Heyman

Inventor： Aravanan Gurusami ,  Mike Nekhamkin ,  R. Gary Heyman

IPC: H04J3/06 ,  H04L7/08 ,  H04L7/10 ,  H04N7/173 ,  H04N21/242 ,  H04N21/437 ,  H04N21/61

CPC classification number: H04J3/0682 ,  H04N21/242 ,  H04N21/437 ,  H04N21/6118 ,  H04N21/6168 ,  H04N7/173 ,  H04J3/0632 ,  H04L7/08

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US5557319A

公开(公告)日：1996-09-17

申请号：US366341

申请日：1994-12-28

Applicant: Aravanan Gurusami ,  Mark Chapman ,  John G. Staiger

Inventor： Aravanan Gurusami ,  Mark Chapman ,  John G. Staiger

IPC: H04N7/173

CPC classification number: H04N7/17309

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US07110167B2

公开(公告)日：2006-09-19

申请号：US10896611

申请日：2004-07-20

Applicant: Aravanan Gurusami ,  Dragan Pikula ,  Daniel O. Ricketts ,  Scott R. Dahl ,  Monica K. Davis

Inventor： Aravanan Gurusami ,  Dragan Pikula ,  Daniel O. Ricketts ,  Scott R. Dahl ,  Monica K. Davis

IPC: H01S3/0941

CPC classification number: H01S3/094003 ,  H01S3/06754 ,  H01S3/094076 ,  H01S5/0652

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20050147418A1

公开(公告)日：2005-07-07

申请号：US10696025

申请日：2003-10-29

Applicant: Aravanan Gurusami ,  Joseph Chiappetta

Inventor： Aravanan Gurusami ,  Joseph Chiappetta

IPC: H04B10/152 ,  H04L25/49 ,  H04B10/06

CPC classification number: H04L25/49 ,  H04B10/6931

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US06411235B1

公开(公告)日：2002-06-25

申请号：US09602747

申请日：2000-06-23

Applicant: Aravanan Gurusami ,  Joseph F. Chiappetta ,  Niranjan Samant ,  Donald T. Wesson

Inventor： Aravanan Gurusami ,  Joseph F. Chiappetta ,  Niranjan Samant ,  Donald T. Wesson

IPC: H03M162

CPC classification number: H04W52/52 ,  H03G3/3036

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US5764707A

公开(公告)日：1998-06-09

申请号：US762642

申请日：1996-12-09

Applicant: Aravanan Gurusami ,  Mike Nekhamkin

Inventor： Aravanan Gurusami ,  Mike Nekhamkin

IPC: H04L27/22 ,  H04L7/033 ,  H04L27/233

CPC classification number: H04L27/2338 ,  H04L7/0334 ,  H04L7/0337

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08731403B2

公开(公告)日：2014-05-20

申请号：US13368254

申请日：2012-02-07

Applicant: Massimo Martinelli ,  Manish Sharma ,  Ruipeng Sun ,  Mark H. Garrett ,  Aravanan Gurusami

Inventor： Massimo Martinelli ,  Manish Sharma ,  Ruipeng Sun ,  Mark H. Garrett ,  Aravanan Gurusami

IPC: H04J14/00 ,  H04J14/02

CPC classification number: G02B27/283 ,  G02B6/2817 ,  G02B6/3512 ,  G02B6/3518 ,  G02B6/3546 ,  G02B2006/1215

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08175127B2

公开(公告)日：2012-05-08

申请号：US12970370

申请日：2010-12-16

Applicant: Aravanan Gurusami ,  Douglas Llewellyn Butler ,  Timothy K. Zahnley ,  Scott R. Dahl ,  Peter G. Wigley

Inventor： Aravanan Gurusami ,  Douglas Llewellyn Butler ,  Timothy K. Zahnley ,  Scott R. Dahl ,  Peter G. Wigley

IPC: H01S3/13 ,  H01S3/00

CPC classification number: H01S3/06754 ,  H01S3/094003 ,  H01S3/094076 ,  H01S3/0941 ,  H01S3/10069 ,  H01S3/1301

Abstract: The present invention generally relates to the operation of optical network equipment such as optical amplifiers. In one aspect, a method of operating an optical amplifier is provided such that output of the optical amplifier avoids the effects of operating an optical gain medium in a non-linear (kink) region of an L-I curve. The method generally includes operating an optical gain medium in a fully off state or fully on state above the kink region with a PWM signal. In another aspect, the effects of the kink region may be compensated for by utilizing a lookup table. A sample of the optical power of an amplified optical signal may be used to select an entry in the lookup table that compensates for non-linearities in the kink region. In yet a further aspect, a lookup table may be used to control a pulse modulator to compensate for non-linearites in the kink region of the L-I curve.

Abstract translation: 本发明一般涉及诸如光放大器之类的光网络设备的操作。 一方面，提供了一种操作光放大器的方法，使得光放大器的输出避免了在L-I曲线的非线性（扭结）区域中操作光学增益介质的影响。 该方法通常包括以PWM信号操作处于扭结区域的完全关闭状态或完全导通状态的光学增益介质。 在另一方面，可以通过利用查找表来补偿扭结区域的影响。 放大的光信号的光功率的样本可以用于选择补偿在扭结区域中的非线性的查找表中的条目。 在另一方面，可以使用查找表来控制脉冲调制器来补偿L-I曲线的扭结区域中的非线性元素。

公开(公告)号：US07706045B2

公开(公告)日：2010-04-27

申请号：US11977798

申请日：2007-10-26

Applicant: Mark Summa ,  Peter Gerard Wigley ,  Aravanan Gurusami ,  Ghang-Ho Lee ,  Douglas Llewellyn Butler ,  Robert David Paul Ridding ,  Timothy Kent Zahnley

Inventor： Mark Summa ,  Peter Gerard Wigley ,  Aravanan Gurusami ,  Ghang-Ho Lee ,  Douglas Llewellyn Butler ,  Robert David Paul Ridding ,  Timothy Kent Zahnley

IPC: G02F1/03 ,  G02B26/00 ,  G02F1/01

CPC classification number: G02B6/29358 ,  G02B6/29394 ,  G02B6/29395 ,  G02B6/29398

Abstract: Described is a method for designing individual stages of a multiple cascaded etalon TDC device to allow continuous thermo-optic tuning over a desired range without inducing incremental signal distortion due to uncontrolled and unpredictable dispersion of the TDC during tuning. This allows the signal to transmit without encountering periods of incremental distortion or dark spots. The method includes prior knowledge of each etalon stage, after full assembly, for spectral group delay profile as a function of temperature through modeling and/or characterization. Characterization can account for performance variations that are due to allowed manufacturing tolerances.