公开(公告)号：US6094285A

公开(公告)日：2000-07-25

申请号：US759901

申请日：1996-12-04

申请人： Michael G. Wickham ,  John C. Brock ,  Philip H. Wisseman ,  Lawrence J. Lembo

发明人： Michael G. Wickham ,  John C. Brock ,  Philip H. Wisseman ,  Lawrence J. Lembo

IPC分类号： G01R23/16 ,  H04B10/00 ,  H04B10/12 ,  H04B10/155 ,  H04B10/158 ,  H04B10/22 ,  H04J1/00 ,  H04J14/00 ,  H04J14/02

CPC分类号： H04B10/671 ,  H04B10/2575 ,  H04B2210/006

摘要： A channelizer for signals for optically channelizing RF signals modulated onto an optical carrier by optically separating the RF signals and mapping the RF signals by way of an optically dispersive element, such as a diffraction grating. In an alternate embodiment of the invention, two stages of optical filters elements are provided in series to perform sequential channelization. Bragg reflection gratings are used for coarse filtering into predetermined bands while Fabry-Perot filters tuned to specific sub-bands of the Bragg reflection gratings are used for channelization. In alternate embodiments of the invention, a silica planar waveguide and an optical splitting device, such as a Talbot splitter, are used.

摘要翻译： 用于通过光学分离RF信号并通过诸如衍射光栅的光学色散元件映射RF信号来光调制到光载波上的RF信号的信道的信道化器。 在本发明的替代实施例中，串联提供两级光学滤波器元件以执行顺序通道化。 布拉格反射光栅用于粗滤波到预定频带，而布雷格反射光栅的特定子带调谐的法布里 - 珀罗滤波器用于信道化。 在本发明的替代实施例中，使用二氧化硅平面波导和诸如Talbot分离器的分光装置。

公开(公告)号：US06269200B1

公开(公告)日：2001-07-31

申请号：US09211457

申请日：1998-12-14

申请人： Michael G. Wickham ,  John C. Brock ,  Philip H. Wisseman ,  Lawrence J. Lembo

发明人： Michael G. Wickham ,  John C. Brock ,  Philip H. Wisseman ,  Lawrence J. Lembo

IPC分类号： G02B628

CPC分类号： H04B10/671 ,  H04B10/2575 ,  H04B2210/006

摘要： A channelizer for signals for optically channelizing RF signals modulated onto an optical carrier by optically separating the RF signals and mapping the RF signals by way of an optically dispersive element, such as a diffraction grating. In an alternate embodiment of the invention, two stages of optical filters elements are provided in series to perform sequential channelization. Bragg reflection gratings are used for coarse filtering into predetermined bands while Fabry-Perot filters tuned to specific sub-bands of the Bragg reflection gratings are used for channelization. In alternate embodiments of the invention, a silica planar waveguide and a optical splitting device, such as a Talbot splitter, are used.

摘要翻译： 用于通过光学分离RF信号并通过诸如衍射光栅的光学色散元件映射RF信号来光调制到光载波上的RF信号的信道的信道化器。 在本发明的替代实施例中，串联提供两级光学滤波器元件以执行顺序通道化。 布拉格反射光栅用于粗滤波到预定频带，而布雷格反射光栅的特定子带调谐的法布里 - 珀罗滤波器用于信道化。 在本发明的替代实施例中，使用二氧化硅平面波导和诸如Talbot分离器的分光装置。

公开(公告)号：US6016371A

公开(公告)日：2000-01-18

申请号：US994344

申请日：1997-12-19

申请人： Michael G. Wickham ,  Philip H. Wisseman

发明人： Michael G. Wickham ,  Philip H. Wisseman

IPC分类号： G02F1/01 ,  G02B6/28 ,  H04B10/04 ,  H04B10/06 ,  H04B10/142 ,  H04B10/152

CPC分类号： G02B6/2861

摘要： An RF optical signal processing system that can provide various filter functions by way of tapped delay lines with fiber Bragg gratings, variable weight taps, positive and negative taps and a short coherent length optical source. Such an RF optical signal processing systems is advantageous over corresponding RF electronic systems and offer the increased bandwidth and lower power consumption making the RF optical signal processing system suitable for various application such as avionics and satellite communications.

摘要翻译： RF光信号处理系统，其可以通过具有纤维布拉格光栅，可变重量抽头，正和抽头以及短相干长度光源的抽头延迟线提供各种滤波器功能。 这样的RF光信号处理系统比相应的RF电子系统更有优势，并提供增加的带宽和更低的功耗，使得RF光信号处理系统适用于诸如航空电子设备和卫星通信之类的各种应用。

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：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：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。