公开(公告)号：US07009210B2

公开(公告)日：2006-03-07

申请号：US09852582

申请日：2001-05-09

申请人： Jithamithra Sarathy ,  Chinnabbu Ekambaram ,  David Lidsky ,  Bharat Dave ,  Boris Stefanov ,  Tan B. Thai ,  Ronald Simprini ,  Julio Martinez ,  Gaurav Naik

发明人： Jithamithra Sarathy ,  Chinnabbu Ekambaram ,  David Lidsky ,  Bharat Dave ,  Boris Stefanov ,  Tan B. Thai ,  Ronald Simprini ,  Julio Martinez ,  Gaurav Naik

IPC分类号： H01L27/15 ,  H01L33/00

CPC分类号： H01L31/101 ,  H01L31/02327 ,  H04B10/07953 ,  H04B10/07955

摘要： A method and apparatus for a tunable optical spectrum analyzer that can measure the optical spectrum of a demultiplexed DWDM signal are presented. The signal level and Optical Signal to Noise Ratio (OSNR) of an individual channel of the DWDM signal can be obtained from the measured optical spectrum. The device employs a rapid tuning and detection technique to obtain the optical spectrum of the incoming signal. In a preferred embodiment the apparatus is fabricated on a single chip resulting in a compact measurement device. Using the device of the preferred embodiment, single channel OSNR can be determined in as small a time interval as approximately 225 microseconds. Using an array of these devices an entire DWDM mixed signal can be monitored as to OP and OSNR in the same time interval.

公开(公告)号：US07203427B2

公开(公告)日：2007-04-10

申请号：US10147333

申请日：2002-05-15

申请人： Gaurav Naik ,  Jithamithra Sarathy ,  Michael Evans ,  David Lidsky

发明人： Gaurav Naik ,  Jithamithra Sarathy ,  Michael Evans ,  David Lidsky

IPC分类号： H04B10/02

CPC分类号： H04B10/299 ,  G02F1/3517 ,  G02F2001/217 ,  G02F2002/006

摘要： A system, method and device for AO2R is presented. The AO2R system presented is redundant, containing multiple pathways for the input and output signals to travel. The system carries out both the regeneration and reshaping functions in the optical domain, and returns a clean output signal at the same bit rate and in the same format as the input signal, on a wavelength of choice. As an all optical device, the apparatus is bit rate and format transparent, and requires no optical-electrical-optical conversion. The system's built in redundancy and symmetry allows less than perfect yields on components to be tolerated, thus increasing the utility of devices manufactured with less than perfect yields. In alternative embodiments the redundancy aspect of the invention can be extended to any optical signal processing device, thus facilitating high availability optical signal processing.

摘要翻译： 提出了一种用于AO2R的系统，方法和装置。 提出的AO2R系统是冗余的，包含用于输入和输出信号行进的多个路径。 该系统在光域中实现再生和再成形功能，并以与所选择的波长相同的比特率和与输入信号相同的格式返回干净的输出信号。 作为全光学装置，该装置是比特率和格式透明的，不需要光电转换。 该系统内置的冗余和对称性允许组件的耐受性不佳，从而增加了以不太完美的产量制造的设备的效用。 在替代实施例中，本发明的冗余方面可以扩展到任何光信号处理设备，从而便于高可用性光信号处理。

公开(公告)号：US06804426B2

公开(公告)日：2004-10-12

申请号：US10147332

申请日：2002-05-15

申请人： David Lidsky ,  Jithamithra Sarathy

发明人： David Lidsky ,  Jithamithra Sarathy

IPC分类号： G02B6026

CPC分类号： H01S5/4068 ,  G02B6/2813 ,  H01S5/50

摘要： A single device for amplifying and multiplying an optical signal is presented. The device is an InP-semiconductor-based amplified multimode interferometer. The three main sections of the device are an input port, an interference and amplification region and N output ports. The input port is a single channel waveguide. The interference and amplification section supports a large number of modes which interfere with one another. By carefully choosing the length of the interference/amplification region to correspond to the constructive interference condition for N equally spaced channel modes, we can reproduce N amplified signals. In an alternate embodiment, by shaping the gain region into a cross pattern, corner reflections and consequent side channel signal distortion in the output can be minimized.

摘要翻译： 提出了用于放大和乘法光信号的单个装置。 该器件是基于InP半导体的放大多模干涉仪。 设备的三个主要部分是输入端口，干扰放大区域和N个输出端口。 输入端口是单通道波导。 干扰和放大部分支持大量相互干扰的模式。 通过仔细选择干扰/放大区域的长度以对应于N个等间隔信道模式的建设性干扰条件，我们可以再现N个放大信号。 在替代实施例中，通过将增益区域整形为交叉图案，可以使输出中的角反射和随后的侧通道信号失真最小化。

公开(公告)号：US06671467B2

公开(公告)日：2003-12-30

申请号：US10195263

申请日：2002-07-15

申请人： Bharat Dave ,  Doruk Engin ,  Kwang Kim ,  Mohammad Laham ,  Julio Martinez ,  Olga Nedzhvetskaya ,  Jithamithra Sarathy ,  Roanld Simprini ,  Boris Stefanov ,  Tan Buu Thai

发明人： Bharat Dave ,  Doruk Engin ,  Kwang Kim ,  Mohammad Laham ,  Julio Martinez ,  Olga Nedzhvetskaya ,  Jithamithra Sarathy ,  Roanld Simprini ,  Boris Stefanov ,  Tan Buu Thai

IPC分类号： H04B1004

CPC分类号： H04B10/299 ,  H04L7/0075

摘要： A method and circuit are presented for the all optical recovery of the clock signal from an arbitrary optical data signal. The method involves two stages. A first stage preprocesses the optical signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The output of the preprocessing stage is fed to a clock recovery stage, which consists of a symmetric interferometer that locks on to the inherent clock signal by using the second stage input signal to trigger two optical sources to self oscillate at the clock rate. In a preferred embodiment the second stage is implemented via SOAs integrated in the arms of an interferometer, with two DFB lasers as terminuses. The output of the interferometer is an optical clock signal at the clock rate of the original input.

公开(公告)号：US07190909B2

公开(公告)日：2007-03-13

申请号：US10172369

申请日：2002-06-14

申请人： Jayanta Das ,  Ganesh Lakshminarayana ,  Kuo-Ming Lee ,  Roman Antosik ,  Scott Kaminski ,  Jithamithra Sarathy ,  Boris Stefanov ,  Ronald Simprini ,  Bharat Dave

发明人： Jayanta Das ,  Ganesh Lakshminarayana ,  Kuo-Ming Lee ,  Roman Antosik ,  Scott Kaminski ,  Jithamithra Sarathy ,  Boris Stefanov ,  Ronald Simprini ,  Bharat Dave

IPC分类号： H04B10/00

CPC分类号： H04B10/0775 ,  H04B2210/078

摘要： Method and apparatus are presented for the generation and detection of maintenance signals in an optical data network. The maintenance signals are such that they can be read both by high bit-rate and low bit-rate receivers. Detection of the maintenance signals occurs in two stages. In a low bit-rate first stage each nodal input port is sampled in a round robin fashion to detect the presence of a maintenance signal. In a high bit-rate second stage the maintenance signal is verified and read by a high speed receiver, along with other high bit-rate information transmitted with it. One second stage high speed receiver is shared among M input channels for cost and circuit efficiency.

摘要翻译： 提出了用于在光数据网络中生成和检测维护信号的方法和装置。 维护信号使得它们可以被高比特率和低比特率接收机读取。 维护信号的检测分两个阶段进行。 在低比特率第一级中，每个节点输入端口以循环方式进行采样以检测维护信号的存在。 在高比特率第二级中，维护信号与高速接收机一起被验证和读取，以及与其一起发送的其他高比特率信息。 一个第二级高速接收机在M个输入通道之间共享成本和电路效率。

公开(公告)号：US06624924B2

公开(公告)日：2003-09-23

申请号：US10195700

申请日：2002-07-15

申请人： Bharat Dave ,  Doruk Engin ,  Kwang Kim ,  Mohammad Laham ,  Julio Martinez ,  Olga Nedzhvetskaya ,  Jithamithra Sarathy ,  Ronald Simprini ,  Boris Stefanov ,  Tan Buu Thai

发明人： Bharat Dave ,  Doruk Engin ,  Kwang Kim ,  Mohammad Laham ,  Julio Martinez ,  Olga Nedzhvetskaya ,  Jithamithra Sarathy ,  Ronald Simprini ,  Boris Stefanov ,  Tan Buu Thai

IPC分类号： G02F135

CPC分类号： H04B10/299 ,  H04L7/0075

摘要： A method and circuit are presented for the all optical recovery of the clock signal from an arbitrary optical data signal. The method involves two stages. A first stage preprocesses the optical signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The output of the preprocessing stage is fed to a clock recovery stage, which consists of a symmetric interferometer that locks on to the inherent clock signal by using the second stage input signal to trigger two optical sources to self oscillate at the clock rate. In a preferred embodiment the second stage is implemented via SOAs integrated in the arms of an interferometer, with two DFB lasers as terminuses. The output of the interferometer is an optical clock signal at the clock rate of the original input.

公开(公告)号：US20070008613A1

公开(公告)日：2007-01-11

申请号：US11412435

申请日：2006-04-27

申请人： Ganesh Lakshminarayana ,  Ruomei Mu ,  Hongsheng Wang ,  Jithamithra Sarathy ,  Boris Stefanov

发明人： Ganesh Lakshminarayana ,  Ruomei Mu ,  Hongsheng Wang ,  Jithamithra Sarathy ,  Boris Stefanov

IPC分类号： H01S3/00

CPC分类号： H04B10/0775 ,  H04B10/0777

摘要： Monitoring of the input power is performed on-chip and is used to monitor and maintain performance, detect failure and trigger network protection strategies. An optical power-monitoring technique uses a photodetector monolithically integrated with the semiconductor optical amplifier—Mach-Zehnder interferometer circuit to monitor the P2R device and keep the output stable while the input power varies.

摘要翻译： 输入功率的监控是片内执行的，用于监控和维护性能，检测故障并触发网络保护策略。 光功率监测技术使用与半导体光放大器 - 马赫 - 策德尔干涉仪电路单片集成的光电检测器来监测P2R器件，并在输入功率变化时保持输出稳定。

公开(公告)号：US20060018587A1

公开(公告)日：2006-01-26

申请号：US11142924

申请日：2005-06-02

申请人： Ganesh Lakshminarayana ,  Jithamithra Sarathy ,  Boris Stefanov

发明人： Ganesh Lakshminarayana ,  Jithamithra Sarathy ,  Boris Stefanov

IPC分类号： G02B6/12

CPC分类号： H04B10/299 ,  G02B6/12007 ,  G02F1/3517 ,  G02F2001/217 ,  G02F2002/006

摘要： A integrated optical circuit comprises an interferometer having a first optical path and a second optical path configured for regenerating an input signal entering the first path by interference at a first coupler between continuous wave (CW) signals from the two optical paths, and a third optical path configured such that a canceling signal passing therethrough cancels, at a second coupler, a traveling signal from the first arm. When the device is operated in a counter-propagative mode, the traveling signal is the CW signal from the first arm. When the device is operated in a co-propagative mode, the traveling signal is the input signal from the first arm.

摘要翻译： 集成光电路包括具有第一光路和第二光路的干涉仪，其被配置用于通过来自两个光路的连续波（CW）信号之间的第一耦合器处的干扰再现进入第一路径的输入信号，以及第三光路 路径被配置为使得通过的抵消信号在第二耦合器处抵消来自第一臂的行进信号。 当设备以反向传播模式操作时，行进信号是来自第一臂的CW信号。 当设备以共同传播模式操作时，行进信号是来自第一臂的输入信号。

公开(公告)号：US07239768B2

公开(公告)日：2007-07-03

申请号：US11142924

申请日：2005-06-02

申请人： Ganesh Lakshminarayana ,  Jithamithra Sarathy ,  Boris Stefanov

发明人： Ganesh Lakshminarayana ,  Jithamithra Sarathy ,  Boris Stefanov

IPC分类号： G02B6/26 ,  G02F1/01

CPC分类号： H04B10/299 ,  G02B6/12007 ,  G02F1/3517 ,  G02F2001/217 ,  G02F2002/006

摘要： A integrated optical circuit comprises an interferometer having a first optical path and a second optical path configured for regenerating an input signal entering the first path by interference at a first coupler between continuous wave (CW) signals from the two optical paths, and a third optical path configured such that a canceling signal passing therethrough cancels, at a second coupler, a traveling signal from the first arm. When the device is operated in a counter-propagative mode, the traveling signal is the CW signal from the first arm. When the device is operated in a co-propagative mode, the traveling signal is the input signal from the first arm.

摘要翻译： 集成光电路包括具有第一光路和第二光路的干涉仪，其被配置用于通过来自两个光路的连续波（CW）信号之间的第一耦合器处的干扰再现进入第一路径的输入信号，以及第三光路 路径被配置为使得通过的抵消信号在第二耦合器处抵消来自第一臂的行进信号。 当设备以反向传播模式操作时，行进信号是来自第一臂的CW信号。 当设备以共同传播模式操作时，行进信号是来自第一臂的输入信号。

公开(公告)号：US06636318B2

公开(公告)日：2003-10-21

申请号：US09971784

申请日：2001-10-05

申请人： Jithamithra Sarathy ,  Bharat Dave ,  Boris Stefanov ,  Ronald Simprini ,  Tan B. Thai ,  Roman Antosik ,  Aleksandr Miglo ,  Olga Nedzhvetska ,  Kwang Kim ,  Doruk Engin

发明人： Jithamithra Sarathy ,  Bharat Dave ,  Boris Stefanov ,  Ronald Simprini ,  Tan B. Thai ,  Roman Antosik ,  Aleksandr Miglo ,  Olga Nedzhvetska ,  Kwang Kim ,  Doruk Engin

IPC分类号： G01B902

CPC分类号： H04B10/299 ,  H04L7/0075

摘要： A method and system for AO3R functionality is presented. The system includes an AO2R device followed by an AOCR clock recovery module and an AOR retiming device. The AOR retiming device takes as input a recovered clock signal extracted from the output of the AO2R by the AOCR clock recovery module. The output is the recovered clock signal gated by the regenerated and reshaped input signal, and a monitor circuit is used to set the optimum operations of the retiming device. In a first embodiment the output of the AOR retiming device is fed to an AOC code and wavelength conversion output stage, which returns the signal to the NRZ coding, on a service wavelength converted to match the fixed wavelength connection with the DWDM transmission system. In a second embodiment the code conversion is incorporated into the AOR retiming device, and wavelength conversion is accomplished in the AOCR clock recovery device.

摘要翻译： 介绍了AO3R功能的方法和系统。 该系统包括一个AO2R设备，后面是一个AOCR时钟恢复模块和一个AOR重新定时器。 AOR重定时器由AOCR时钟恢复模块作为AO2R输出提取的恢复时钟信号作为输入。 输出是由再生和重构输入信号选通的恢复的时钟信号，并且使用监视器电路来设置重新定时装置的最佳操作。 在第一实施例中，AOR重定时装置的输出被馈送到AOC码和波长转换输出级，该AOC码和波长转换输出级将信号返回到NRZ编码，该信号被转换成与DWDM传输系统匹配的固定波长连接。 在第二实施例中，代码转换被并入到AOR重定时装置中，并且在AOCR时钟恢复装置中实现波长转换。