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1. 发明授权

US08174705B1 Tilting mirror controlled using null-based interferometric sensing 有权
标题翻译：使用基于零的干涉测量感测控制倾斜镜
公开(公告)号：US08174705B1
公开(公告)日：2012-05-08
申请号：US12707650
申请日：2010-02-17
申请人： James F. Coward , Ting K. Yee , William C. Dickson
发明人： James F. Coward , Ting K. Yee , William C. Dickson
IPC分类号： G01B11/02 , G01N21/00
CPC分类号： G01B11/26 , G01B9/02004 , G01B9/02057 , G01B9/02068 , G01B9/0207 , G01B2290/15 , G01D5/266 , G01J3/26 , G02B26/101
摘要： A mirror drive mechanism for a tilting mirror is controlled using feedback from one or more interferometric angular sensors. The wavelength of an optical beam is varied as it is fed into an interferometric angular sensor. The wavelength at which the resulting interference pattern is measured to be at a minimum intensity is determined. This wavelength is used to determine a distance quantity representative of the angular position of the mirror.
摘要翻译：使用来自一个或多个干涉式角度传感器的反馈来控制用于倾斜镜的反射镜驱动机构。光束的波长随着被馈送到干涉式角度传感器而变化。确定所得到的干涉图案处于最小强度的波长。该波长用于确定表示反射镜的角位置的距离量。

2. 发明授权

US06529303B1 Optical communications networks utilizing frequency division multiplexing 有权
标题翻译：利用频分复用的光通信网络
公开(公告)号：US06529303B1
公开(公告)日：2003-03-04
申请号：US09405367
申请日：1999-09-24
申请人： Michael W. Rowan , David B. Upham , Augustus Elmer , Laurence J. Newell , David A. Pechner , Abraham Kou , James F. Coward , Norman L. Swenson , Minnie Ho , Peter H. Chang , Ting K. Yee , Stuart E. Wilson
发明人： Michael W. Rowan , David B. Upham , Augustus Elmer , Laurence J. Newell , David A. Pechner , Abraham Kou , James F. Coward , Norman L. Swenson , Minnie Ho , Peter H. Chang , Ting K. Yee , Stuart E. Wilson
IPC分类号： H04J1402
CPC分类号： B82Y15/00 , H04B10/2513 , H04J1/08 , H04J1/14 , H04J14/0298 , H04L5/06 , H04L27/34
摘要： A frequency division multiplexing (FDM) node used in optical communications networks provides add-drop multiplexing (ADM) functionality between optical high-speed channels and electrical low-speed channels. The FDM node includes a high-speed system and an ADM crosspoint. The high-speed system converts between an optical high-speed channel and its constituent electrical low-speed channels through the use of frequency division multiplexing and preferably also QAM modulation. The ADM crosspoint couples incoming low-speed channels to outgoing low-speed channels, thus implementing the ADM functionality for the FDM node.
摘要翻译：在光通信网络中使用的频分复用（FDM）节点在光高速信道和电低速信道之间提供了添加多路复用（ADM）功能。 FDM节点包括高速系统和ADM交叉点。高速系统通过使用频分多路复用并优选地也进行QAM调制，在光学高速信道与其组成的低速信道之间进行转换。 ADM交叉点将输入低速通道耦合到输出低速通道，从而实现FDM节点的ADM功能。

3. 发明授权

US07447436B2 Optical communications using multiplexed single sideband transmission and heterodyne detection 有权
标题翻译：使用复用单边带传输和外差检测的光通信
公开(公告)号：US07447436B2
公开(公告)日：2008-11-04
申请号：US11514381
申请日：2006-08-31
申请人： Ting K. Yee , Peter H. Chang , Chin-Sheng Tarng , Gregory M. Cutler , Slava Yazhgur , Ji Li , Laurence J. Newell , James F. Coward , Michael W. Rowan , Norman L. Swenson , Matthew C. Bradshaw
发明人： Ting K. Yee , Peter H. Chang , Chin-Sheng Tarng , Gregory M. Cutler , Slava Yazhgur , Ji Li , Laurence J. Newell , James F. Coward , Michael W. Rowan , Norman L. Swenson , Matthew C. Bradshaw
IPC分类号： H04B10/08 , H04B10/04 , H04B10/06 , H04B10/145 , H04B10/148 , H04J14/02 , H04J1/00 , H04J1/04 , H04J1/08
CPC分类号： H04B10/50 , H04B10/61 , H04B10/64
摘要： A transmitter subsystem generates an optical signal which contains multiple subbands of information. The subbands have different polarizations. For example, in one approach, two or more optical transmitters generate optical signals which have different polarizations. An optical combiner optically combines the optical signals into a composite optical signal for transmission across an optical fiber. In another aspect, each optical transmitter generates an optical signal containing both a lower optical sideband and an upper optical sideband (i.e., a double sideband optical signal). An optical filter selects the upper optical sideband of one optical signal and the lower optical sideband of another optical signal to produce a composite optical signal.
摘要翻译：发射机子系统产生包含多个信息子带的光信号。子带具有不同的极化。例如，在一种方法中，两个或更多个光发射机产生具有不同偏振的光信号。光学组合器将光学信号光学地组合成用于跨光纤传输的复合光信号。在另一方面，每个光发射机产生包含下光边带和上光边带（即，双边带光信号）的光信号。光滤波器选择一个光信号的上光边带和另一光信号的下光边带产生复合光信号。

4. 发明授权

US06407843B1 System and method for spectrally efficient transmission of digital data over optical fiber 有权
标题翻译：通过光纤进行数字数据的高效传输的系统和方法
公开(公告)号：US06407843B1
公开(公告)日：2002-06-18
申请号：US09728376
申请日：2000-11-28
申请人： Michael W. Rowan , Peter Chang , James F. Coward , Roger R. Taur , Stuart Wilson , Ting K. Yee
发明人： Michael W. Rowan , Peter Chang , James F. Coward , Roger R. Taur , Stuart Wilson , Ting K. Yee
IPC分类号： H04B1000
CPC分类号： H04J14/0298 , H04L1/0057 , H04L1/006 , H04L1/0065 , H04L1/0071 , H04L5/06 , H04L27/34 , H04L27/36 , H04L27/38 , H04L2001/0096
摘要： A system transmits digital data over an optical fiber at high aggregate data rates and high bandwidth efficiencies. The system includes a modulation stage, a frequency division multiplexer, and an optical modulator. The modulation stage QAM-modulates a plurality of incoming digital data channels. The frequency division multiplexer combines the QAM-modulated signals by frequency division multiplexing them into an RF signal. The optical modulator uses the RF signal to modulate an optical carrier for transmission over an optical fiber.
摘要翻译：系统以高聚合数据速率和高带宽效率通过光纤传输数字数据。该系统包括调制级，频分多路复用器和光调制器。调制级QAM调制多个输入数字数据通道。分频多路复用器将QAM调制信号通过频率分频复用为RF信号进行组合。光调制器使用RF信号来调制光载波以在光纤上传输。

5. 发明授权

US06204951B1 Electro-optic modulator with improved harmonic performance 失效
标题翻译：具有改善谐波性能的电光调制器
公开(公告)号：US06204951B1
公开(公告)日：2001-03-20
申请号：US09082620
申请日：1998-05-19
申请人： James F. Coward , Ting K. Yee , Peter Chang , Abraham Kou
发明人： James F. Coward , Ting K. Yee , Peter Chang , Abraham Kou
IPC分类号： G02F103
CPC分类号： G02F1/225 , G02F1/2255 , G02F2203/19
摘要： An electro-optic modulator includes a splitting section, at least three transmission legs, an RF phase-shifting section, a DC-phase shifting section, and a combining section. The splitting section splits a received optical signal into sub-signals, one for each transmission leg. The RF phase-shifting section phase shifts at least two of the sub-signals by an amount proportional to a received RF signal; while the DC phase-shifting section phase shifts at least two of the sub-signals by a DC phase. The combining section combines the phase-shifted sub-signals into a modulated optical signal. In a preferred embodiment, the modulator is characterized by design parameters, such as splitting ratio, DC phase shift, RF coupling efficiency, and combining ratio, and these design parameters are selected to ensure that the modulator meets predetermined performance characteristics, such as maximum harmonic levels or minimum signal to noise ratios.
摘要翻译：电光调制器包括分离部分，至少三个传输腿，RF相移部分，DC相移部分和组合部分。分离部分将接收到的光信号分成子信号，每个传输分支一个。 RF相移部分将至少两个子信号相移一个与所接收的RF信号成比例的量; 而直流相移部分通过DC相位将至少两个子信号相移。组合部分将相移的子信号组合成调制的光信号。在优选实施例中，调制器的特征在于设计参数，例如分频比，DC相移，RF耦合效率和组合比，并且选择这些设计参数以确保调制器满足预定的性能特性，例如最大谐波电平或最小信噪比。

6. 发明授权

US5323406A Photonic mixer for photonically multiplying two electrical signals in two optically interconnected interferometric modulators operated at modulation outside the linear range 失效
标题翻译：光子混合器，用于在两个光学互连的干涉式调制器之间进行光子倍增，在线性范围外的调制下工作
公开(公告)号：US5323406A
公开(公告)日：1994-06-21
申请号：US970752
申请日：1992-11-02
申请人： Ting K. Yee , James F. Coward , Peter H. Chang
发明人： Ting K. Yee , James F. Coward , Peter H. Chang
IPC分类号： G02F1/225 , G02F2/00 , H01S5/0687 , H01S3/13
CPC分类号： G02F1/225 , G02F2/002 , G02F2203/19 , H01S5/0687
摘要： A Mach-Zehnder modulator (MZM), which divides a CW laser beam into two optical portions, is biased at a 180.degree. phase difference between the two optical portions. An RF signal and an LO signal are simultaneously applied to one of the optical portions of the laser beam to produce phase changes between the two optical portions. The two optical portions of the laser beam are then recombined into an optical output beam, which is detected by a photodetector. The photodetector generates a photocurrent, which contains a component at a beat frequency--i.e., the frequency difference between the RF and LO frequencies. The waveform of the photocurrent component at the beat frequency is substantially the same (except for amplitude and a fixed phase shift) as the waveform of the RF signal.
摘要翻译：将CW激光束分成两个光学部分的马赫 - 曾德调制器（MZM）被偏置在两个光学部分之间的180°相位差处。 RF信号和LO信号同时施加到激光束的光学部分之一，以产生两个光学部分之间的相位变化。然后将激光束的两个光学部分重新组合成由光电检测器检测的光输出光束。光电检测器产生光电流，其包含以频率为单位的分量，即RF和LO频率之间的频率差。拍频时的光电流成分的波形与RF信号的波形基本相同（振幅除以固定的相移）。

7. 发明授权

US06452945B1 Electrical add-drop multiplexing for optical communications networks utilizing frequency division multiplexing 有权
标题翻译：使用频分复用的光通信网络的电子分插复用
公开(公告)号：US06452945B1
公开(公告)日：2002-09-17
申请号：US09229594
申请日：1999-01-13
申请人： David B. Upham , Augustus Elmer , Laurence J. Newell , David A. Pechner , Abraham Kou , Michael W. Rowan , James F. Coward , Norman L. Swenson , Minnie Ho
发明人： David B. Upham , Augustus Elmer , Laurence J. Newell , David A. Pechner , Abraham Kou , Michael W. Rowan , James F. Coward , Norman L. Swenson , Minnie Ho
IPC分类号： H04J308
CPC分类号： H04J14/0298 , H04L1/0057 , H04L1/006 , H04L1/0065 , H04L1/0071 , H04L5/06 , H04L27/34 , H04L27/36 , H04L27/38 , H04L2001/0096
摘要： A frequency division multiplexing (FDM) node used in optical communications networks provides add-drop multiplexing (ADM) functionality between optical high-speed channels, and low-speed tributaries. The FDM node includes a high-speed system and an ADM crosspoint. The high-speed system converts between an optical high-speed channel and its constituent electrical, low-speed channels through the use of frequency division multiplexing. The ADM crosspoint couples any incoming low-speed channels and any incoming tributaries to any outgoing low-speed channels and tributaries, thus implementing the ADM functionality for the FDM node.
摘要翻译：在光通信网络中使用的频分复用（FDM）节点在光学高速信道和低速支路之间提供分插复用（ADM）功能。 FDM节点包括高速系统和ADM交叉点。高速系统通过使用频分复用在光高速信道与其组成的电，低速信道之间进行转换。 ADM交叉点将任何传入的低速信道和任何传入的支路耦合到任何传出的低速信道和支路，从而实现FDM节点的ADM功能。

8. 发明授权

US11959801B2 Hyperspectral imaging systems 有权
公开(公告)号：US11959801B2
公开(公告)日：2024-04-16
申请号：US17929286
申请日：2022-09-01
申请人： James F. Coward , David Alan Pechner , Gregory Mitchell , Ji Li
发明人： James F. Coward , David Alan Pechner , Gregory Mitchell , Ji Li
IPC分类号： G01J3/10 , G01J3/28 , G06T7/521
CPC分类号： G01J3/108 , G01J3/2823 , G06T7/521 , G01J2003/2826 , G06T2207/10036 , G06T2207/10048
摘要： Shortwave infrared (SWIR) hyperspectral imaging (HSI) systems comprise a supercontinuum laser source configured to illuminate objects and a receiver comprising a spectrometer configured to receive light reflected from the objects. In some cases, hyperspectral images can be created by raster scanning of the source/receiver across a scene. The supercontinuum laser source provides active illumination to allow collection of hyperspectral imagery during day (including overcast conditions) and night.

9. 发明授权

US07228077B2 Channel gain control for an optical communications system utilizing frequency division multiplexing 有权
标题翻译：利用频分复用的光通信系统的信道增益控制
公开(公告)号：US07228077B2
公开(公告)日：2007-06-05
申请号：US09854153
申请日：2001-05-11
申请人： Laurence J. Newell , James F. Coward
发明人： Laurence J. Newell , James F. Coward
IPC分类号： H04B10/00
CPC分类号： B82Y15/00 , H04B10/2507 , H04B10/2513 , H04B10/2569 , H04J1/065 , H04J1/14 , H04J3/0685 , H04J14/02 , H04J14/0221 , H04J14/0298 , H04L5/06 , H04L29/12207 , H04L61/20
摘要： Attenuation caused by dispersion in an optical fiber communications system is compensated. A number of low-speed channels is to be transmitted across an optical fiber. Each low-speed channel is allocated a different frequency band for transmission. The attenuation caused by dispersion is estimated for each of the frequency bands. The power of each low-speed channel is adjusted to compensate for the estimated attenuation. The power-adjusted low-speed channels are frequency division multiplexed together to produce an electrical high-speed channel suitable for transmission across the communications system.
摘要翻译：由光纤通信系统中的色散引起的衰减得到补偿。许多低速通道将通过光纤传输。每个低速信道被分配不同的频带用于传输。对于每个频带估计由色散引起的衰减。调整每个低速通道的功率以补偿估计的衰减。经功率调节的低速信道被频分复用在一起以产生适合于跨通信系统传输的电高速信道。

10. 发明授权

US07664403B2 Synchronizing nodes in an optical communications system utilizing frequency division multiplexing 失效
标题翻译：使用频分复用在光通信系统中同步节点
公开(公告)号：US07664403B2
公开(公告)日：2010-02-16
申请号：US11683210
申请日：2007-03-07
申请人： Laurence J. Newell , James F. Coward
发明人： Laurence J. Newell , James F. Coward
IPC分类号： H04B10/00
CPC分类号： B82Y15/00 , H04B10/2507 , H04B10/2513 , H04B10/2569 , H04J1/065 , H04J1/14 , H04J3/0685 , H04J14/02 , H04J14/0221 , H04J14/0298 , H04L5/06 , H04L29/12207 , H04L61/20
摘要： Attenuation caused by dispersion in an optical fiber communications system is compensated. A number of low-speed channels is to be transmitted across an optical fiber. Each low-speed channel is allocated a different frequency band for transmission. The attenuation caused by dispersion is estimated for each of the frequency bands. The power of each low-speed channel is adjusted to compensate for the estimated attenuation. The power-adjusted low-speed channels are frequency division multiplexed together to produce an electrical high-speed channel suitable for transmission across the communications system.
摘要翻译：由光纤通信系统中的色散引起的衰减得到补偿。许多低速通道将通过光纤传输。每个低速信道被分配不同的频带用于传输。对于每个频带估计由色散引起的衰减。调整每个低速通道的功率以补偿估计的衰减。经功率调节的低速信道被频分复用在一起以产生适合于跨通信系统传输的电高速信道。

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