公开(公告)号：US06650673B2

公开(公告)日：2003-11-18

申请号：US09213088

申请日：1998-12-15

Applicant: Jin Hong ,  Rongqing Hui ,  Maurice S. O'Sullivan

Inventor： Jin Hong ,  Rongqing Hui ,  Maurice S. O'Sullivan

IPC: H01S319

CPC classification number: H01S5/1228 ,  H01S5/0057 ,  H01S5/0265 ,  H01S5/0623 ,  H01S5/06258 ,  H01S5/1021 ,  H01S5/1215

Abstract: A compact source capable of generating continuously tunable high frequency microwave radiation and short optical pulses in the picosecond/sub-picosecond range is invented. It includes a laser structure having two lasers formed on the same substrate which simultaneously operate at different longitudinal modes. Each laser has a complex coupled (gain-coupled or loss-coupled) grating which is formed by deep etching through a multi-quantum well structure, either of the active medium or of the additional lossy quantum-well layers, thus ensuring no substantial interaction between lasers. The lasers have a common active medium and shared optical path and provide mutual light injection into each other which results in generation of a beat signal at a difference frequency of two lasers. The beat frequency is defined by spacing between the laser modes and may be continuously tuned by current injection and/or temperature variation. Thus, the beat signal provides a continuously tunable microwave radiation. To form a train of short optical pulses, the beat signal is either further sent to a saturable absorber followed by a semiconductor optical amplifier, or sent directly into an optical compressor which includes a dispersion fiber. As a result, a duration of each impulse is compressed, and a train of short optical pulses is formed.

Abstract translation: 发明了能够产生连续可调谐的高频微波辐射和皮秒/次皮秒范围内的短光脉冲的紧凑型光源。 它包括具有形成在同一衬底上的两个激光器的激光器结构，其同时在不同的纵向模式下工作。 每个激光器具有复合耦合（增益耦合或损耗耦合）光栅，其通过深入蚀刻通过多量子阱结构，活性介质或附加的有损的量子阱层中的任一个形成，从而确保没有实质的相互作用 激光之间。 激光器具有共同的有源介质和共享光路，并且彼此相互注入，这导致以两个激光器的差频产生拍频信号。 节拍频率由激光模式之间的间距定义，并且可以通过电流注入和/或温度变化来连续调谐。 因此，拍频信号提供连续可调的微波辐射。 为了形成短脉冲序列，将拍频信号进一步发送到可饱和吸收体，随后是半导体光放大器，或者直接发送到包括分散光纤的光学压缩器中。 结果，每个脉冲的持续时间被压缩，并形成一串短的光脉冲。

公开(公告)号：US20130151040A1

公开(公告)日：2013-06-13

申请号：US13476539

申请日：2012-05-21

Applicant: Christopher T. ALLEN ,  Trenton Shuey ,  Rongqing Hui

Inventor： Christopher T. ALLEN ,  Trenton Shuey ,  Rongqing Hui

IPC: B64D45/00 ,  G01C5/00

CPC classification number: G01B9/08 ,  B64D45/00 ,  G01C5/005

Abstract: A low-altitude altimeter (10) and a method of determining low altitudes for unmanned aerial vehicles (24). The altimeter includes at least two illuminators (12,14), at least one sensor (16), and a computing device (18). The illuminators (12,14) emit signals which are received by the sensor (16) in such a way that an angle at which they are received is determinable by the computing device (18). The computing device (18) processes each signal received by the sensor (16), determines the angle at which the sensor (16) received the signal, and, based thereon, determines the altitude of the unmanned aerial vehicle (24). When a first pair of illuminators are arranged along a fuselage axis, and a second pair of illuminators are arranged orthogonally to that axis, the computing device can combine first and second altitude, pitch angle, and roll angle measurements to provide a more refined altitude determination.

Abstract translation: 一种低空高度计（10）和一种确定无人驾驶飞行器低空的方法（24）。 高度计包括至少两个照明器（12,14），至少一个传感器（16）和计算设备（18）。 照明器（12,14）发射由传感器（16）接收的信号，使得它们被接收的角度由计算装置（18）确定。 计算装置（18）处理由传感器（16）接收的每个信号，确定传感器（16）接收信号的角度，并且基于此确定无人驾驶飞行器（24）的高度。 当第一对照明器沿着机身轴线布置，并且第二对照明器与该轴线正交布置时，计算装置可以组合第一和第二高度，俯仰角和侧倾角测量值，以提供更精确的高度确定 。

公开(公告)号：US06493088B1

公开(公告)日：2002-12-10

申请号：US09411649

申请日：1999-10-04

Applicant: Rongqing Hui ,  Maurice S. O'Sullivan

Inventor： Rongqing Hui ,  Maurice S. O'Sullivan

IPC: G01B902

CPC classification number: H04J14/02 ,  G01J9/02 ,  G01J2009/023 ,  G01J2009/0253 ,  H04B10/0795 ,  H04J14/0227 ,  H04J14/0276

Abstract: The present invention provides a method and apparatus for monitoring optical signals with an expand frequency resolution. The invention permits high-resolution measurements of optical signal spectrums while retaining wide bandwidth operation through appropriate control circuitry. An interferometer having a periodic frequency response formed of equally spaced narrow-band peaks is used to sweep the entire signal spectrum. The interferometer frequency response is incrementally tuned in cycles so that each of its frequency response peaks cyclically scans a particular spectral band of the signal spectrum. During each cycle, the interferometer isolates multiple,spectrally resolved portions of the optical signal spectrum where each portion originates frog different spectral band. In this way, a high-resolution measurement of the entire signal spectrum can be obtained. The invention may be network protocol independent and can be incorporated into an optical spectrum analyzer or directly into any optical terminal. The invention can be used for signal spectrum monitoring applications including link quality monitoring (LQM) in optical communications networks to monitor various transmission parameters such as such as carrier wavelengths, optical signal-to-noise ratios (SNR), amplified spontaneous emissions (ASE), noise levels, optical non-linearities or other signal baseband information such as data rates and formats.

Abstract translation: 本发明提供一种以扩展频率分辨率监视光信号的方法和装置。 本发明允许光信号频谱的高分辨率测量，同时通过适当的控制电路保持宽带宽操作。 使用具有由等间隔的窄带峰值形成的周期性频率响应的干涉仪来扫描整个信号频谱。 干涉仪频率响应以周期递增调谐，使得其每个频率响应峰值对信号频谱的特定谱带进行循环扫描。 在每个周期期间，干涉仪隔离光信号频谱的多个光谱解析部分，其中每个部分起源于青蛙不同的光谱带。 以这种方式，可以获得整个信号频谱的高分辨率测量。 本发明可以是与网络协议无关的，并且可以并入到光谱分析仪中或直接并入任何光学终端。 本发明可用于信号频谱监测应用，包括光通信网络中的链路质量监测（LQM），以监测各种传输参数，例如载波波长，光信噪比（SNR），放大自发辐射（ASE） ，噪声电平，光学非线性或其他信号基带信息，如数据速率和格式。

公开(公告)号：US5774242A

公开(公告)日：1998-06-30

申请号：US785806

申请日：1997-01-15

Applicant: Maurice Stephen O'Sullivan ,  Rongqing Hui ,  Jingyu Zhou

Inventor： Maurice Stephen O'Sullivan ,  Rongqing Hui ,  Jingyu Zhou

IPC: H04B10/07 ,  H04B10/073 ,  H04L25/02 ,  H04B10/08

CPC classification number: G01M11/33

Abstract: A performance evaluation analysis for optical transmission systems is disclosed. A reference eye mask is defined for a transmitter and for a reference optical transmission link. The quality of the transmission for a live path is determined by applying the reference eye mask on the eye diagram of the electrical signal recovered at a point of measurement with a distortion measurement unit. The point of measurement could be established at a receiver optical connection plane, for measuring the optical transmission link and transmitter penalty, or could be at the optical connection plane of a transmitter, for measuring the performance of the transmitter. The optical path may include optical amplifiers, dispersion compensating modules, active and passive components.

Abstract translation: 公开了一种光传输系统的性能评估分析。 为发射机和参考光传输链路定义参考眼罩。 通过使用失真测量单元将参考眼罩应用于在测量点恢复的电信号的眼图上来确定实时路径的传输质量。 测量点可以在接收机光学连接平面上建立，用于测量光传输链路和发射机损耗，或者可以在发射机的光学连接平面处，用于测量发射机的性能。 光路可以包括光放大器，色散补偿模块，有源和无源元件。

公开(公告)号：US07742152B2

公开(公告)日：2010-06-22

申请号：US11767501

申请日：2007-06-23

Applicant: Rongqing Hui ,  Christopher T. Allen ,  Peter Adany

Inventor： Rongqing Hui ,  Christopher T. Allen ,  Peter Adany

IPC: G01C3/08

CPC classification number: G01S17/325 ,  G01S7/4917

Abstract: An optical homodyne detection scheme for FM chirped lidar is described. The system performs de-chirping within a photodetector, and it does not require high-speed photo-detection or RF mixing. Embodiments are also described for dealing with phase noise.

Abstract translation: 描述了用于FM啁啾激光雷达的光学零差检测方案。 该系统在光电检测器内进行去啁啾，不需要高速光检测或RF混合。 还描述了用于处理相位噪声的实施例。

公开(公告)号：US06697159B2

公开(公告)日：2004-02-24

申请号：US09907343

申请日：2001-07-17

Applicant: Rongqing Hui

Inventor： Rongqing Hui

IPC: G01J345

CPC classification number: G01J3/2803 ,  G01J3/26 ,  G01J3/28 ,  G01J3/32 ,  G02B2006/12195

Abstract: An Optical Domain Signal Analyzer, having an optical filter, a dispersive element and a detector is utilized to provide high resolution spectrum analysis over a wide optical bandwidth. The optical domain signal analyzer broadly includes an optical filter for providing wavelength samples of a received optical signal, a dispersive element for receiving the samples and dispersing the samples, and a detector for receiving the dispersed signal and for providing electrical signals representative of the dispersed sample. A preferred embodiment includes a processor for receiving the electrical signal and calculating the characteristics of the spectrum.

Abstract translation: 具有光学滤波器，色散元件和检测器的光域信号分析器被用于在宽的光学带宽上提供高分辨率的光谱分析。 光域信号分析仪广泛地包括用于提供接收到的光信号的波长样本的光学滤波器，用于接收样本和分散样本的分散元件，以及用于接收分散信号并提供代表分散样品的电信号的检测器 。 优选实施例包括用于接收电信号并计算频谱的特性的处理器。

公开(公告)号：US06687009B2

公开(公告)日：2004-02-03

申请号：US10266574

申请日：2002-10-09

Applicant: Rongqing Hui ,  Maurice S. O'Sullivan

Inventor： Rongqing Hui ,  Maurice S. O'Sullivan

IPC: G01B902

CPC classification number: H04J14/02 ,  G01J9/02 ,  G01J2009/023 ,  G01J2009/0253 ,  H04B10/0795 ,  H04J14/0227 ,  H04J14/0276

Abstract: The present invention provides a method and apparatus for monitoring optical signals with an expanded frequency resolution. The invention permits high-resolution measurements of optical signal spectrums while retaining wide bandwidth operation through appropriate control circuitry. An interferometer having a periodic frequency response formed of equally spaced narrow-band peaks is used to sweep the entire signal spectrum. The interferometer frequency response is incrementally tuned in cycles so that each of its frequency response peaks cyclically scans a particular spectral band of the signal spectrum. During each cycle, the interferometer isolates multiple spectrally resolved portions of the optical signal spectrum where each portion originates from a different spectral band. In this way, a high-resolution measurement of the entire signal spectrum can be obtained. The invention may be network protocol independent and can be incorporated into an optical spectrum analyzer or directly into any optical terminal. The invention can be used for signal spectrum monitoring applications including link quality monitoring (LQM) in optical communications networks to monitor various transmission parameters such as such as carrier wavelengths, optical signal-to-noise ratios (SNR), amplified spontaneous emissions (ASE), noise levels, optical non-linearities or other signal baseband information such as data rates and formats.

Abstract translation: 本发明提供一种用于以扩大的频率分辨率监测光信号的方法和装置。 本发明允许光信号频谱的高分辨率测量，同时通过适当的控制电路保持宽带宽操作。 使用具有由等间隔的窄带峰值形成的周期性频率响应的干涉仪来扫描整个信号频谱。 干涉仪频率响应以周期递增调谐，使得其每个频率响应峰值对信号频谱的特定谱带进行循环扫描。 在每个周期期间，干涉仪隔离光信号频谱的多个光谱解析部分，其中每个部分来自不同的光谱带。 以这种方式，可以获得整个信号频谱的高分辨率测量。 本发明可以是与网络协议无关的，并且可以并入到光谱分析仪中或直接并入任何光学终端。 本发明可用于信号频谱监测应用，包括光通信网络中的链路质量监测（LQM），以监测各种传输参数，例如载波波长，光信噪比（SNR），放大自发辐射（ASE） ，噪声电平，光学非线性或其他信号基带信息，如数据速率和格式。

公开(公告)号：US06542274B1

公开(公告)日：2003-04-01

申请号：US09430330

申请日：1999-10-29

Applicant: Ken Demarest ,  Chris Johnson ,  Chris Allen ,  Rongqing Hui ,  Benyuan Zhu

Inventor： Ken Demarest ,  Chris Johnson ,  Chris Allen ,  Rongqing Hui ,  Benyuan Zhu

IPC: H04B1000

CPC classification number: H04B10/299 ,  H04L7/0075

Abstract: A clock recovery system recovers an optical clock signal from an optical data signal that is wavelength and data rate independent. The system splits the optical data signal into a first optical data signal and a second optical data signal. The system then transmits the first optical data signal and the second optical data signal in opposite directions around a fiber loop. In the fiber loop, the system modulates and amplifies the first optical data signal to generate a modulated-amplified first optical data signal. The system then recovers the optical clock signal after the modulated-amplified first optical data signal and the second optical data signal interact in the fiber loop.

Abstract translation: 时钟恢复系统从波长和数据速率独立的光学数据信号中恢复光时钟信号。 该系统将光学数据信号分解为第一光学数据信号和第二光学数据信号。 然后，系统围绕光纤环路以相反的方向发射第一光学数据信号和第二光学数据信号。 在光纤回路中，系统调制和放大第一光学数据信号以产生经调制放大的第一光学数据信号。 然后，系统在经调制放大的第一光数据信号和第二光数据信号在光纤回路中相互作用后恢复光时钟信号。

公开(公告)号：US09031406B2

公开(公告)日：2015-05-12

申请号：US13566249

申请日：2012-08-03

Applicant: Rongqing Hui ,  Andrea Fumagalli

Inventor： Rongqing Hui ,  Andrea Fumagalli

IPC: H04J14/00 ,  H04J14/02 ,  H04L27/26 ,  H04Q11/00

CPC classification number: H04J14/022 ,  H04J14/0206 ,  H04J14/0212 ,  H04J14/0257 ,  H04J14/0268 ,  H04J14/0298 ,  H04L27/2697 ,  H04Q11/0005

Abstract: The present invention uses digital subcarrier cross-connect switching to accomplish various network processes more efficiently. These processes include interconnecting network components, and performing optical and optoelectronic add/drop operations.

Abstract translation: 本发明使用数字子载波交叉连接切换来更有效地完成各种网络处理。 这些过程包括互连网络组件，以及执行光学和光电子添加/删除操作。

公开(公告)号：US08059958B1

公开(公告)日：2011-11-15

申请号：US12249073

申请日：2008-10-10

Applicant: Junfeng Jiang ,  Rongqing Hui ,  Douglas L. Richards ,  Stephen A. Oliva

Inventor： Junfeng Jiang ,  Rongqing Hui ,  Douglas L. Richards ,  Stephen A. Oliva

IPC: H04B10/08 ,  H04B17/00

CPC classification number: H04B10/0795

Abstract: A method is provided for measuring polarization dependent loss in an optical transmission system. In the method, a first optical signal is generated, and a polarization of the first optical signal is altered over time. The first optical signal is combined with a second optical signal from the optical transmission system to yield a combined optical signal, which is coherently detected to yield a radio frequency signal. A power of the radio frequency signal is measured. The measured power of the radio frequency signal is processed to generate an indication of the polarization dependent loss of the optical transmission system.

Abstract translation: 提供了一种用于测量光传输系统中的偏振相关损耗的方法。 在该方法中，产生第一光信号，第一光信号的极化随时间改变。 第一光信号与来自光传输系统的第二光信号组合以产生组合的光信号，其被相干地检测以产生射频信号。 测量射频信号的功率。 处理射频信号的测量功率以产生光传输系统的偏振相关损耗的指示。