公开(公告)号：US06396801B1

公开(公告)日：2002-05-28

申请号：US09120851

申请日：1998-07-22

申请人： Eric L. Upton ,  Michael G. Wickham

发明人： Eric L. Upton ,  Michael G. Wickham

IPC分类号： H04B1004

CPC分类号： H04J14/005 ,  H04J14/007

摘要： An improved communication system which provides improved spectral efficiency as well as relatively low co-channel interference modulation characteristics relative to known communication systems. In particular, the communication system includes a modem that includes an arbitrary or chaotic waveform generator and a chaotic waveform demodulator configured as a sliding window correlator that is adapted to modulate and demodulate an arbitrary or chaotic waveforms. The modulator includes a finite impulse response (FIR) filter, for example, formed from tapped delay lines with unequal time delays. The demodulator is formed as a matched filter for recovery of the input data signals. The modem is adapted to transmit either optical or RF waveforms. In order to prevent drift of the tap weights due to temperature drift of the tapped delay lines and other factors, a closed servo loop may be provided for each tap weight. By maintaining the accuracy of the tap weights, the system in accordance with the present invention is adapted to provide arbitrary or chaotic modulation and demodulation of the input data signal thereby providing increased spectral efficiency and improved performance which provides increased data output relative to known communication systems based on modulation of periodic signals while minimizing auto correlation errors.

摘要翻译： 一种改进的通信系统，其相对于已知的通信系统提供改进的频谱效率以及相对低的同信道干扰调制特性。 特别地，通信系统包括调制解调器，其包括任意或混沌波形发生器和被配置为适于调制和解调任意或混沌波形的滑动窗口相关器的混沌波形解调器。 调制器包括例如由具有不等时间延迟的抽头延迟线形成的有限脉冲响应（FIR）滤波器。 解调器形成为用于恢复输入数据信号的匹配滤波器。 调制解调器适用于传输光或RF波形。 为了防止由于抽头延迟线的温度漂移引起的抽头重量的漂移和其他因素，可以为每个抽头重量提供封闭的伺服回路。 通过保持抽头权重的精度，根据本发明的系统适于提供输入数据信号的任意或混沌调制和解调，从而提供增加的频谱效率和改进的性能，其相对于已知的通信系统提供增加的数据输出 基于周期信号的调制，同时最小化自相关误差。

公开(公告)号：US6167024A

公开(公告)日：2000-12-26

申请号：US42928

申请日：1998-03-17

申请人： Eric L. Upton ,  Michael G. Wickham ,  Martin P. Smith

发明人： Eric L. Upton ,  Michael G. Wickham ,  Martin P. Smith

IPC分类号： G02B6/34 ,  H04J14/00 ,  H04B7/216

CPC分类号： H04J14/005 ,  H04J14/007

摘要： An orthogonal pilot tone servo controller provides a servo control loop for each tap in a delay line processor where each servo acquires its independence from the other tap's servos utilizing an orthogonal code set modulated on top of the existing tap values. The orthogonal codes are attenuated in amplitude such that the code sets are transparent to the processed signals of interest, but the code's length enables each tap's servo controller to independently recover the tap's state from the aggregate of signals and codes through processing gain realized in each loop's recovery circuit. A plurality of taps can be thus be servo controlled simultaneously, providing for extremely wide bandwidth processes which can be performed accurately with digital controls.

摘要翻译： 正交导频音调伺服控制器为延迟线处理器中的每个抽头提供伺服控制回路，其中每个伺服器利用在现有抽头值顶部调制的正交码集来获取其与另一抽头的伺服的独立性。 正交码在幅度上衰减，使得码集对于所处理的感兴趣的信号是透明的，但是代码的长度使得每个抽头的伺服控制器能够从信号和代码的集合中独立地恢复抽头的状态，通过每个循环中实现的处理增益 恢复电路。 因此，可以同时伺服控制多个抽头，从而提供可以用数字控制精确地执行的极宽带宽处理。

公开(公告)号：US06708003B1

公开(公告)日：2004-03-16

申请号：US09466370

申请日：1999-12-16

申请人： Michael G. Wickham ,  Eric L. Upton

发明人： Michael G. Wickham ,  Eric L. Upton

IPC分类号： H04J1408

CPC分类号： H04B10/1121 ,  H01S3/06754 ,  H01S3/1307 ,  H01S3/2383 ,  H04J14/007

摘要： An optical transmission system includes an optical source for providing an input optical signal to an optical array having a plurality of delay lines, and by utilizing orthogonal code modulation for active optical wave component control, the optical signal split among the plurality of delay lines is phase and amplitude modulated for efficient transmission to a destination point.

摘要翻译： 一种光传输系统，包括用于向具有多个延迟线的光学阵列提供输入光信号的光源，并且通过利用用于有源光波分量控制的正交码调制，在多个延迟线之间分离的光信号是相位 并进行幅度调制，以便有效地传输到目的地点。

公开(公告)号：US06208773B1

公开(公告)日：2001-03-27

申请号：US09252497

申请日：1999-02-18

申请人： Michael G. Wickham ,  Eric L. Upton

发明人： Michael G. Wickham ,  Eric L. Upton

IPC分类号： G02F1335

CPC分类号： G02F1/025 ,  G02B6/2932 ,  G02B2006/12078 ,  G02B2006/12107 ,  G02F1/011 ,  G02F1/2257 ,  G02F1/313 ,  G02F2201/20 ,  G02F2201/307 ,  H01S5/0425 ,  H01S5/125

摘要： A Bragg grating device (10) is provided including a semiconductive optical waveguide (12) with a Bragg grating structure (14) formed along its length. A first plurality of electrodes (16) are disposed on a first surface (18) of the optical waveguide (12) and individually communicate with select members of the Bragg grating structure (14). A second plurality of electrodes (20) are disposed on a second surface (22) of the optical waveguide (12) and individually communicate with select members of the Bragg grating structure (14) such that individual electrodes of the second plurality of electrodes (20) are electrically coupled to individual electrodes of the first plurality of electrodes (16) via the Bragg grating structure (14). As such, a plurality of addressable portions (30) of the Bragg grating device (6) are defined. A plurality of electrical leads (32) are electrically coupled between individual electrodes of the second plurality of electrodes (20) and a power source (38) such that a refractive index of each portion (30) along the Bragg grating structure (14) may be selectively varied along the length of the optical waveguide (12). As a further feature of the present invention, a controller (36) is disposed between the plurality of electrical leads (32) and the power source (38) for varying a magnitude and distribution of current among the individual portions (30) of the Bragg grating structure (14) to effectuate different optical applications.

摘要翻译： 提供布拉格光栅装置（10），其包括具有沿其长度形成的布拉格光栅结构（14）的半导体光波导（12）。 第一多个电极（16）设置在光波导（12）的第一表面（18）上，并且分别与布拉格光栅结构（14）的选择部件连通。 第二多个电极（20）设置在光波导（12）的第二表面（22）上并且分别与布拉格光栅结构（14）的选择部件连通，使得第二多个电极（20 ）经由布拉格光栅结构（14）电耦合到第一多个电极（16）的各个电极。 这样，布拉格光栅装置（6）的多个可寻址部分（30）被定义。 多个电引线（32）电耦合在第二多个电极（20）的单个电极和电源（38）之间，使得沿布拉格光栅结构（14）的每个部分（30）的折射率可以 沿着光波导（12）的长度选择性地变化。 作为本发明的另一特征，控制器（36）设置在多个电引线（32）和电源（38）之间，用于改变布拉格的各个部分（30）中的电流的大小和分布 光栅结构（14），以实现不同的光学应用。

公开(公告)号：US08254017B2

公开(公告)日：2012-08-28

申请号：US12407470

申请日：2009-03-19

申请人： Robert R. Rice ,  Michael G. Wickham ,  Hiroshi Komine ,  Peter Livingston ,  Peter Thielen ,  Charles Phillip Asman

发明人： Robert R. Rice ,  Michael G. Wickham ,  Hiroshi Komine ,  Peter Livingston ,  Peter Thielen ,  Charles Phillip Asman

IPC分类号： C03B37/016 ,  C03B37/075 ,  H04B10/17

CPC分类号： H01S3/06716 ,  C03B37/01211 ,  C03B37/01413 ,  C03B37/016 ,  C03B37/02763 ,  C03B2201/08 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/32 ,  C03B2201/42 ,  C03B2203/18 ,  G02B6/028 ,  H01S3/0672 ,  H01S3/06729 ,  H01S3/09415 ,  H01S2301/03

摘要： A method is provided for forming an optical fiber amplifier. The method comprises providing a composite preform having a gain material core that includes one or more acoustic velocity varying dopants to provide a longitudinally varying acoustic velocity profile along the gain material core to suppress Stimulated Brillouin Scattering (SBS) effects by raising the SBS threshold and drawing the composite preform to form the optical fiber amplifier.

摘要翻译： 提供一种用于形成光纤放大器的方法。 该方法包括提供具有增益材料芯的复合预制件，增益材料芯包括一个或多个声速变化掺杂剂，以沿着增益材料芯提供纵向变化的声速分布，以通过提高SBS阈值和绘制来抑制受激布里渊散射（SBS）效应 复合预成型件形成光纤放大器。

公开(公告)号：US20080084598A1

公开(公告)日：2008-04-10

申请号：US11543677

申请日：2006-10-05

申请人： Joshua E. Rothenberg ,  Robert R. Rice ,  Michael G. Wickham ,  Hiroshi Komine

发明人： Joshua E. Rothenberg ,  Robert R. Rice ,  Michael G. Wickham ,  Hiroshi Komine

IPC分类号： G02F1/01

CPC分类号： H01S3/2383 ,  B23K26/0604 ,  B23K26/0613 ,  H01S3/06754 ,  H01S3/10007

摘要： A system and method for combining plural low power light beams into a coherent high power light beam by means of a diffractive optical element operating as both a beam combiner and beam sampler. An oscillation source transmits a master signal that is split into plural beams propagating at a common wavelength. Each beam is phase locked by a corresponding phase modulator according to a phase correction signal. The beams are directed through a fiber array to the diffractive optical element to allow efficient coherent combination of the beams at a desired diffraction order. The diffractive optical element includes a periodic sampling grating for diffracting a low power sample beam representative of the combined beam. A phase detection stage detects phases of constituent beams in the sample beam from which the phase correction signals are derived and fed back to the phase modulators. The diffractive optical element may be further modified to collimate beams diverging from the fiber array and to focus the sample beam onto a phase detector.

摘要翻译： 一种通过用作光束组合器和光束取样器的衍射光学元件将多个低功率光束组合成相干高功率光束的系统和方法。 振荡源发送分割成以公共波长传播的多个波束的主信号。 每个光束根据相位校正信号由相应的相位调制器锁相。 光束通过光纤阵列引导到衍射光学元件，以允许以期望的衍射级别的光束的有效相干组合。 衍射光学元件包括用于衍射代表组合光束的低功率采样光束的周期性采样光栅。 相位检测级检测相位校正信号从中得到的采样光束中的构成光束的相位，并将其反馈到相位调制器。 可以进一步修改衍射光学元件以准直从光纤阵列发散的光束并将样品光束聚焦到相位检测器上。

公开(公告)号：US07468832B2

公开(公告)日：2008-12-23

申请号：US11543677

申请日：2006-10-05

申请人： Joshua E. Rothenberg ,  Robert R. Rice ,  Michael G. Wickham ,  Hiroshi Komine

发明人： Joshua E. Rothenberg ,  Robert R. Rice ,  Michael G. Wickham ,  Hiroshi Komine

IPC分类号： H04B10/17 ,  G01B9/00

CPC分类号： H01S3/2383 ,  B23K26/0604 ,  B23K26/0613 ,  H01S3/06754 ,  H01S3/10007

摘要： A system and method for combining plural low power light beams into a coherent high power light beam by means of a diffractive optical element operating as both a beam combiner and beam sampler. An oscillation source transmits a master signal that is split into plural beams propagating at a common wavelength. Each beam is phase locked by a corresponding phase modulator according to a phase correction signal. The beams are directed through a fiber array to the diffractive optical element to allow efficient coherent combination of the beams at a desired diffraction order. The diffractive optical element includes a periodic sampling grating for diffracting a low power sample beam representative of the combined beam. A phase detection stage detects phases of constituent beams in the sample beam from which the phase correction signals are derived and fed back to the phase modulators. The diffractive optical element may be further modified to collimate beams diverging from the fiber array and to focus the sample beam onto a phase detector.

公开(公告)号：US07339727B1

公开(公告)日：2008-03-04

申请号：US11543613

申请日：2006-10-05

申请人： Joshua E. Rothenberg ,  Robert R. Rice ,  Sami A. Shakir ,  Michael G. Wickham

发明人： Joshua E. Rothenberg ,  Robert R. Rice ,  Sami A. Shakir ,  Michael G. Wickham

IPC分类号： H01S3/00

CPC分类号： H01S3/06791 ,  H01S3/0805 ,  H01S3/0812 ,  H01S3/10053 ,  H01S3/2383

摘要： A system and method for combining plural low power light beams into a coherent high power light beam. Optical amplifiers transmit a plurality of light beams propagating at a common wavelength through an array of optical fiber emitters. Each constituent beam is emitted from the array at a different propagation angle, collimated, and incident on a diffractive optical element operating as a beam combiner such that incident beams when properly phased and located are combined into a coherent beam at a desired diffraction order. A beam splitter or a periodic sampling grating on the diffractive optical element directs a low power sample beam to a spatial filter passing resonant mode output back to the optical amplifiers in a ring laser configuration thereby passively synchronizing phases of the constituent beams to maximize combination efficiency of the coherent beam.

摘要翻译： 一种用于将多个低功率光束组合成相干高功率光束的系统和方法。 光放大器通过光纤发射器阵列发射以公共波长传播的多个光束。 每个构成光束以阵列的不同传播角发射，准直并入射在作为光束组合器工作的衍射光学元件上，使得入射光束在适当地定相并定位时，以期望的衍射级组合成相干光束。 衍射光学元件上的分束器或周期性采样光栅将低功率采样光束引导到以环形激光器配置将谐振模式输出回到光放大器的空间滤波器，从而被动地同步构成光束的相位，以最大化组合效率 相干光束。

公开(公告)号：US06678294B1

公开(公告)日：2004-01-13

申请号：US09707219

申请日：2000-11-06

申请人： Hiroshi Komine ,  Stephen J. Brosnan ,  Michael G. Wickham

发明人： Hiroshi Komine ,  Stephen J. Brosnan ,  Michael G. Wickham

IPC分类号： H01S313

CPC分类号： H01S3/2383 ,  H01S3/06754 ,  H01S3/1307 ,  H01S5/0622 ,  H01S2301/03

摘要： A seed laser apparatus is disclosed. It comprises a distributed feedback laser system for transmitting a dithered optical signal having a frequency versus time characteristic that is represented by a triangular waveform and an optical medium including a plurality of optical signal paths, each path including an optical fiber and a fiber amplifier. The optical medium is characterized by stimulated Brillouin scattering (SBS) having a response time, whereby the period of the triangular waveform is equal to the round-trip transit time in the fiber or shorter than the response time of the SBS.

摘要翻译： 公开了种子激光装置。 它包括分布反馈激光系统，用于发送具有由三角波形表示的频率对时间特性的抖动光信号和包括多个光信号路径的光学介质，每个路径包括光纤和光纤放大器。 光学介质的特征在于具有响应时间的受激布里渊散射（SBS），由此三角波形的周期等于光纤中的往返传播时间或短于SBS的响应时间。

公开(公告)号：US07120175B2

公开(公告)日：2006-10-10

申请号：US10761747

申请日：2004-01-20

申请人： Joshua E. Rothenberg ,  Eric C. T. Cheung ,  Hiroshi Komine ,  Robert R. Rice ,  Michael G. Wickham

发明人： Joshua E. Rothenberg ,  Eric C. T. Cheung ,  Hiroshi Komine ,  Robert R. Rice ,  Michael G. Wickham

IPC分类号： H01S3/10

CPC分类号： H01S5/14 ,  G02F1/37 ,  H01S3/06754 ,  H01S3/2383

摘要： A laser array architecture scalable to very high powers by closely stacking fiber amplifiers, but in which the output wavelength is selectable to be in the visible or ultraviolet region, without being restricted by the wavelengths usually inherent in the choice of fiber materials. A pump signal at a fundamental frequency is amplified in the fiber amplifier array and input to an array of nonlinear crystals that function as harmonic generators, producing an output array at a desired harmonic of the fundamental frequency. A phase detection and correction system maintains the array of outputs in phase coherency, resulting in a high power output with high beam quality, at the desired frequency. The array of nonlinear crystals may a single array to produce a second harmonic output frequency, or a combination of multiple cascaded arrays configured to produce a selected higher order harmonic frequency.

摘要翻译： 通过紧密地堆叠光纤放大器，但其中输出波长可选择在可见光或紫外区域的激光阵列结构可以扩展到非常高的功率，而不受光纤材料选择中通常固有的波长的限制。 基频的泵浦信号在光纤放大器阵列中被放大并输入到作为谐波发生器的非线性晶体阵列，产生基频的期望谐波的输出阵列。 相位检测和校正系统维持相位一致性的输出阵列，从而产生具有所需频率的高光束质量的高功率输出。 非线性晶体阵列可以是单个阵列以产生二次谐波输出频率，或者被配置为产生选定的较高次谐波频率的多个级联阵列的组合。