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1. 发明授权

US06351322B1 Q detection circuit 有权
标题翻译： Q检测电路
公开(公告)号：US06351322B1
公开(公告)日：2002-02-26
申请号：US09161978
申请日：1998-09-29
申请人： Michael J. Ransford , Michael G. Taylor , Jeffrey C. Livas , Vipul Bhatnagar , Minh T. Nguyen
发明人： Michael J. Ransford , Michael G. Taylor , Jeffrey C. Livas , Vipul Bhatnagar , Minh T. Nguyen
IPC分类号： H04B1008
CPC分类号： H04B10/07953
摘要： A testing circuit is provided for determining the Q-factor of an optical communication system. In the testing circuit, a variable attenuator attenuates a received optical signal in response to an attenuator control signal. A first optical-to-electrical converter converts a first portion of the attenuated optical signal into an electrical data signal. A second optical-to-electrical converter converts a second portion of the attenuated optical signal into a first power indication signal. A decision circuit detects high and low data bits in the electrical data signal based on a plurality of threshold voltage signals, and provides decision signals indicative of the results of these determinations. An error monitoring circuit receives the decision signals, determines the bit error rate of the incoming optical signal for the plurality of threshold voltages, and provides bit error rate signals. A microprocessor receives the power regulation signal and the bit error rate signals, and generates a first attenuator control signal and a plurality of threshold voltage signals. In the testing circuit, the variable attenuator operates to attenuate the received optical signal such that it is at an optimal input level for the operation of the first optical-to electrical converter. The microprocessor determines an optimal bit error rate and an optimal Q-factor for the incoming signal based on the bit error rates of the incoming optical signal for the plurality of threshold voltages
摘要翻译：提供用于确定光通信系统的Q因子的测试电路。在测试电路中，可变衰减器响应衰减器控制信号衰减接收的光信号。第一光电转换器将衰减的光信号的第一部分转换成电数据信号。第二光电转换器将衰减的光信号的第二部分转换成第一功率指示信号。判定电路基于多个阈值电压信号检测电数据信号中的高和低数据位，并提供指示这些确定结果的判定信号。错误监视电路接收决定信号，确定多个阈值电压的输入光信号的误码率，并提供误码率信号。微处理器接收功率调节信号和误码率信号，并产生第一衰减器控制信号和多个阈值电压信号。在测试电路中，可变衰减器操作以衰减接收到的光信号，使得其处于用于第一光电转换器的操作的最佳输入电平。微处理器基于入射光信号对多个阈值电压的误码率确定输入信号的最佳误码率和最佳Q因子

2. 发明授权

US06532087B1 Multiple signal Q-tester 有权
标题翻译：多信号Q-测试仪
公开(公告)号：US06532087B1
公开(公告)日：2003-03-11
申请号：US09306008
申请日：1999-05-06
申请人： Michael J. Ransford , Minh T. Nguyen , Michael G. Taylor , Jeffrey C. Livas , Vipul Bhatnagar
发明人： Michael J. Ransford , Minh T. Nguyen , Michael G. Taylor , Jeffrey C. Livas , Vipul Bhatnagar
IPC分类号： H04B1006
CPC分类号： H04B10/07953
摘要： An apparatus and method are provided for monitoring the Q-factor of a plurality of main signals that are simultaneously transmitted across a fiber optic line using wave division multiplexing. In particular, the includes an optical tap, a tunable optical bandpass filter, and a Q-detection circuit. The optical tap operates to tap the fiber optic line to provide a plurality of tapped signals corresponding to the plurality of main signals. The tunable optical bandpass filter acts to select one of the plurality of tapped signals, by only passing a selected signal in a chosen channel frequency band. The Q-detection circuit then determines the Q-factor of the selected signal. This operation can be performed sequentially for each of the plurality of tapped signals to provide a measure of the Q-factor for each of the plurality of main signals. This operation can also be continually repeated to provide a constant measurement of the Q-factor of each of the plurality of main signals.
摘要翻译：提供了一种用于监视通过使用波分复用同时在光纤线路上传输的多个主信号的Q因子的装置和方法。特别地，其包括光学抽头，可调谐光学带通滤波器和Q检测电路。光学抽头操作以分接光纤线以提供对应于多个主信号的多个抽头信号。可调光带通滤波器仅通过选择的信道频带中的选定信号来选择多个抽头信号中的一个。 Q检测电路然后确定所选信号的Q因子。对于多个抽头信号中的每一个可以顺序执行该操作，以提供对于多个主信号中的每一个的Q因子的量度。也可以连续地重复该操作，以提供对多个主信号中的每一个的Q因子的恒定测量。

3. 发明授权

US06760532B1 Optical device having dynamic channel equalization 有权
标题翻译：具有动态信道均衡的光学设备
公开(公告)号：US06760532B1
公开(公告)日：2004-07-06
申请号：US09493313
申请日：2000-01-28
申请人： Jeffrey C. Livas , Tomas Brenner
发明人： Jeffrey C. Livas , Tomas Brenner
IPC分类号： G02B600
CPC分类号： H04B10/296 , H04B10/077 , H04B10/07955 , H04L2025/03477 , H04L2025/03611
摘要： An optical device including dynamic channel equalization is provided. In an exemplary multiplexer or line amplifier configuration the device includes a plurality of separate optical paths, each of which receiving a separate group of optical signals. Each group of optical signals is provided to an associated variable optical attenuator. Separate inputs of an optical combiner are each coupled to an output of an associated one of the variable optical attenuators. The optical combiner has an output providing the separate groups of optical signals in an aggregated form on an aggregate optical signal path. An optical performance monitor is coupled to the aggregate optical signal path, and is configured to detect an optical signal power of each of the separate groups. The monitor supplies a feedback signal to corresponding ones of the variable optical attenuators for adjusting a respective attenuation associated with each of the attenuators in dependence of the detected optical signal powers. The device may also be provided in a demultiplexer configuration.
摘要翻译：提供了包括动态信道均衡的光学装置。在示例性多路复用器或线路放大器配置中，该器件包括多个单独的光路，每个光路接收单独的一组光信号。每组光信号被提供给相关联的可变光衰减器。光组合器的独立输入各自耦合到可变光衰减器中相关联的一个的输出端。光合并器具有在聚合光信号路径上以聚集形式提供单独的光信号组的输出。光学性能监视器耦合到聚合光信号路径，并且被配置为检测每个单独组的光信号功率。监视器向对应的可变光衰减器提供反馈信号，用于根据检测到的光信号功率调整与每个衰减器相关联的相应衰减。该设备还可以以解复用器配置提供。

4. 发明授权

US08963068B2 System and method for nanostructure apodization mask for transmitter signal suppression in a duplex telescope 有权
标题翻译：用于双相望远镜中发射机信号抑制的纳米结构变迹掩模的系统和方法
公开(公告)号：US08963068B2
公开(公告)日：2015-02-24
申请号：US13193249
申请日：2011-07-28
申请人： John G. Hagopian , Jeffrey C. Livas , Shahram R. Shiri , Stephanie A. Getty , June L Tveekrem , James J. Butler
发明人： John G. Hagopian , Jeffrey C. Livas , Shahram R. Shiri , Stephanie A. Getty , June L Tveekrem , James J. Butler
IPC分类号： H01L31/00 , G01J1/02 , G02B5/20 , B82Y20/00
CPC分类号： G01J1/0214 , B82Y20/00 , G02B5/205 , Y10S977/752 , Y10S977/778 , Y10S977/809
摘要： Disclosed herein is a system for an apodization mask composed of multi-walled carbon nanotubes (MWCNTs) for absorbing unwanted stray light. An apodization mask is a precise pattern or shape that is mathematically derived using light scattering measurement techniques to achieve optimal light absorption.Also disclosed herein is an apparatus for a duplex telescope with stray light suppressing capabilities comprising: a primary mirror for transmitting and receiving light; a secondary mirror for defocusing transmitted light onto the primary mirror and for focusing received light; a photodetector which receives light; a laser transmitter which transmits light; and an apodization mask for absorbing stray transmitted light.
摘要翻译：本文公开了一种用于吸收不想要的杂散光的由多壁碳纳米管（MWCNT）组成的变迹掩模的系统。变迹掩模是使用光散射测量技术在数学上得到的精确图案或形状，以实现最佳的光吸收。本文还公开了一种具有杂散光抑制能力的双工望远镜的装置，包括：用于发射和接收光的主反射镜; 用于将透射光散焦到主镜上并用于聚焦所接收的光的次级镜; 接收光的光电检测器; 发射光的激光发射器; 以及用于吸收杂散透射光的变迹掩模。

5. 发明申请

US20170218521A1 FABRICATION OF PETAL-SHAPED MASKS FOR SUPPRESSION OF THE ON-AXIS POISSON SPOT IN TELESCOPE SYSTEMS 审中-公开
公开(公告)号：US20170218521A1
公开(公告)日：2017-08-03
申请号：US15275839
申请日：2016-09-26
申请人： Ron Shiri , Jeffrey C. Livas , John G. Hagopian , Matthew T. Showalter , Thomas R. Stevenson
发明人： Ron Shiri , Jeffrey C. Livas , John G. Hagopian , Matthew T. Showalter , Thomas R. Stevenson
IPC分类号： G02B5/02 , G02B23/04 , G01B9/06 , G02B27/58 , G02B23/00 , G02B27/09 , G02B27/42 , G02B23/02
CPC分类号： C23F1/26 , G02B27/0927 , G02B27/0988
摘要： Aspects of the present disclosure involve a system and method for suppressing a Poisson spot. A Poisson spot is a bright spot in the geometrical shadow of circular/spherical shapes. A broad class of telescopes that involve simultaneous transmit and receive require suppression of the reflected light from the secondary mirror on the detector. In one embodiment, coronagraphy petal-shaped masks are fabricated using photolithography and wire-EDM for the suppression of the Poisson spot. The petal-shaped masks can be designed and fabricated to operate at varying Fresnel numbers and petal tip radius-of-curvature (ROC).

6. 发明授权

US06931196B2 Optical device including dynamic channel equalization 有权
标题翻译：光学设备包括动态信道均衡
公开(公告)号：US06931196B2
公开(公告)日：2005-08-16
申请号：US10866825
申请日：2004-06-15
申请人： Jeffrey C. Livas , Tomas Brenner
发明人： Jeffrey C. Livas , Tomas Brenner
IPC分类号： H04B10/08 , H04B10/17 , H04L25/03 , G02B6/00
CPC分类号： H04B10/296 , H04B10/077 , H04B10/07955 , H04L2025/03477 , H04L2025/03611
摘要： An optical device including dynamic channel equalization is provided. In an exemplary multiplexer or line amplifier configuration the device includes a plurality of separate optical paths, each of which receiving a separate group of optical signals. Each group of optical signals is provided to an associated variable optical attenuator. Separate inputs of an optical combiner are each coupled to an output of an associated one of the variable optical attenuators. The optical combiner has an output providing the separate groups of optical signals in an aggregated form on an aggregate optical signal path. An optical performance monitor is coupled to the aggregate optical signal path, and is configured to detect an optical signal to noise ratio of each of the separate groups. The monitor supplied a feedback signal to corresponding ones of the variable optical attenuators for adjusting a respective attenuation associated with each of the attenuators in dependence of the detected optical signal to noise ratios. The device may also be provided in a demultiplexer configuration.
摘要翻译：提供了包括动态信道均衡的光学装置。在示例性多路复用器或线路放大器配置中，该器件包括多个单独的光路，每个光路接收单独的一组光信号。每组光信号被提供给相关联的可变光衰减器。光组合器的独立输入各自耦合到可变光衰减器中相关联的一个的输出端。光合并器具有在聚合光信号路径上以聚集形式提供单独的光信号组的输出。光学性能监视器耦合到聚合光信号路径，并且被配置为检测每个单独组的光信噪比。监视器向对应的可变光衰减器提供反馈信号，用于根据检测到的光信噪比来调整与每个衰减器相关联的相应衰减。该设备还可以以解复用器配置提供。

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