公开(公告)号：US07065107B2

公开(公告)日：2006-06-20

申请号：US10687495

申请日：2003-10-16

申请人： Charles E. Hamilton ,  Dennis D Lowenthal ,  Roy D. Mead

发明人： Charles E. Hamilton ,  Dennis D Lowenthal ,  Roy D. Mead

IPC分类号： H01S3/098 ,  H01S3/08

CPC分类号： H01S5/141 ,  H01S3/0805 ,  H01S5/4062

摘要： A method and apparatus for improving the beam quality of the emissions from a multimode gain medium such as a broad-stripe laser through the use of SBC techniques is provided. In order to achieve the desired beam quality without a significant reduction in output power, discrete lasing regions are formed across the gain medium using an etalon or similar device located within the SBC cavity.

摘要翻译： 提供了一种用于通过使用SBC技术来改善诸如宽条激光器的多模增益介质的发射的光束质量的方法和装置。 为了实现期望的光束质量而没有输出功率的显着降低，使用位于SBC腔内的标准具或类似装置在增益介质之间形成分立的激光区域。

公开(公告)号：US06456756B1

公开(公告)日：2002-09-24

申请号：US09690787

申请日：2000-10-17

申请人： Roy D. Mead ,  Dennis D. Lowenthal ,  Jason N. Farmer

发明人： Roy D. Mead ,  Dennis D. Lowenthal ,  Jason N. Farmer

IPC分类号： G02B628

CPC分类号： G02B6/425 ,  G02B6/2931 ,  G02B6/4249 ,  H04B10/2916

摘要： A method and apparatus for achieving broad gain bandwidth in a Raman amplifier using a wavelength multiplexed pump source is provided. The pump source offers high power, broad bandwidth, and the ability to tailor the pump spectrum, thus providing a means to achieve gain flattening within a specific band of the Raman amplifier. The pump source is preferably comprised of one or more multi-gain element arrays multiplexed together within a single external resonator cavity. Interposed between the array and the resonator cavity output coupler are a collimating element and a diffraction grating. The collimating element can be a refractive optic, a ¼ pitch GRIN lens, or a reflective optic. The diffraction grating can either be transmissive or reflective. The combination of the diffraction grating and the collimating element forces each emitter within the array to lase at a distinct wavelength. In order to achieve an overall bandwidth greater than the gain bandwidth of a single emitter array, either multiple arrays of differing center wavelength are packaged together or a large array is used with a laterally varying quantum well thickness or epitaxy. An intracavity spatial filter can be used to improve the beam quality and reduce cross-talk between emitters.

摘要翻译： 提供了一种使用波长复用泵浦源实现拉曼放大器中的宽增益带宽的方法和装置。 泵浦源提供高功率，宽带宽和定制泵浦频谱的能力，从而提供了在拉曼放大器的特定频带内实现增益平坦化的手段。 泵浦源优选地由单个外部谐振器腔内一起复用的一个或多个多增益元件阵列组成。 阵列与谐振腔输出耦合器之间是一个准直元件和衍射光栅。 准直元件可以是折射光学元件，1/4间距GRIN透镜或反射光学元件。 衍射光栅可以是透射的或反射的。 衍射光栅和准直元件的组合迫使阵列内的每个发射器以不同的波长发光。 为了实现大于单个发射器阵列的增益带宽的总带宽，将不同中心波长的多个阵列封装在一起，或者使用具有横向变化的量子阱厚度或外延的大阵列。 可以使用腔内空间滤波器来提高光束质量并减少发射器之间的串扰。

公开(公告)号：US06832024B2

公开(公告)日：2004-12-14

申请号：US10042943

申请日：2001-11-19

申请人： David C. Gerstenberger ,  Mark S. Bowers ,  Dennis D. Lowenthal ,  Jason N. Farmer ,  Roy D. Mead ,  Charles I. Miyake

发明人： David C. Gerstenberger ,  Mark S. Bowers ,  Dennis D. Lowenthal ,  Jason N. Farmer ,  Roy D. Mead ,  Charles I. Miyake

IPC分类号： G02B634

CPC分类号： G02B6/02133 ,  G02B6/02138 ,  G02F1/353 ,  G02F1/37 ,  G02F2001/3507 ,  G02F2001/354 ,  G02F2201/16 ,  H01S3/117 ,  H01S5/0092 ,  H01S5/183

摘要： A wide variety of Fiber Bragg writing devices comprising solid state lasers are provided. The solid state lasers emit moderate peak-power output beams which are suitable for efficient production of fiber Bragg gratings without causing embrittlement of the optical waveguide. These solid state lasers generate fourth harmonic output beams with wavelengths of approximately 240 nm, in order to match the primary absorption peak in the ultraviolet range for a typical optical waveguide. Some of these solid state lasers comprise a fequency-doubling crystal and a CLBO crystal used in a non-critically phase-matched orientation as a frequency-quadrupling crystal. In such lasers, both the frequency-doubling crystal and frequency-quadrupling crystal are preferably engineered to minimize or eliminate beam “walkoff.”

摘要翻译： 提供了包括固态激光器的各种各样的光纤布拉格写入装置。 固态激光器发出中等的峰值功率输出光束，其适合于有效地生产光纤布拉格光栅而不会导致光波导的脆化。 这些固态激光器产生具有约240nm波长的第四谐波输出光束，以便匹配典型光波导的紫外范围内的初级吸收峰。 这些固体激光器中的一些包括倍频晶体和用于非临界相位匹配取向的CLBO晶体作为频率 - 四重晶体。 在这样的激光器中，倍频晶振和四频频率晶体优选地被设计成最小化或消除波束“走走”。

公开(公告)号：US5742626A

公开(公告)日：1998-04-21

申请号：US689820

申请日：1996-08-14

申请人： Roy D. Mead ,  Charles I. Miyake ,  Dennis D. Lowenthal

发明人： Roy D. Mead ,  Charles I. Miyake ,  Dennis D. Lowenthal

IPC分类号： G02F1/35 ,  G02F1/37 ,  G02F1/39 ,  H01S3/10 ,  A61B17/36

CPC分类号： G02F1/37 ,  G02F1/3534 ,  G02F1/39 ,  G02F2001/354

摘要： A solid state laser system producing coherent radiations at deep ultraviolet wavelengths includes a solid state laser producing a first beam having a wavelength near 1 micron. The 1 micron beam is passed to both a harmonic generation stage and to a tunable optical parametric oscillator. The harmonic generation stage is configured to produce a fifth harmonic of the 1 micron beam, while the optical parametric oscillator produces a tunable beam in the near infrared spectrum (e.g., approximately 2.075 micron). The fifth harmonic and the near infrared beams are mixed in a sum frequency generator to produce a highly coherent beam in the deep ultraviolet (e.g., between approximately 180 nm to 213 nm).

摘要翻译： 在深紫外波长下产生相干辐射的固态激光系统包括固体激光器，其产生波长接近1微米的第一光束。 1微米光束传递到谐波发生级和可调光参量振荡器。 谐波发生级被配置为产生1微米光束的五次谐波，而光参量振荡器在近红外光谱（例如，大约2.075微米）下产生可调波束。 五次谐波和近红外光束在和频发生器中混合以在深紫外线（例如，在大约180nm至213nm之间）产生高度相干的光束。

公开(公告)号：US07535631B2

公开(公告)日：2009-05-19

申请号：US11751637

申请日：2007-05-22

申请人： Andrew J. W. Brown ,  Eric C. Honea ,  Thomas H. Loftus ,  Roy D. Mead ,  Charles E. Hamilton ,  Anping Liu ,  Charles A. Lemaire

发明人： Andrew J. W. Brown ,  Eric C. Honea ,  Thomas H. Loftus ,  Roy D. Mead ,  Charles E. Hamilton ,  Anping Liu ,  Charles A. Lemaire

IPC分类号： H04B10/17 ,  H01S3/00

CPC分类号： G02B27/1086 ,  G02B27/1006 ,  G02B27/108 ,  G02B27/123 ,  G02B27/144 ,  G02B27/145

摘要： Apparatus and method for spectral-beam combining light from a plurality of high-power fiber lasers that, in some embodiments, use two substantially identical diffraction gratings in a parallel, mutually compensating configuration to combine a plurality of separate parallel input beams each having a slightly different successively higher wavelength into a single output beam of high quality. In other embodiments, a single diffraction grating is used to combine a plurality of different wavelengths, wherein the input laser beams are obtained from very narrow linewidth sources to reduce chromatic dispersion. In some embodiments, diagnostics and adjustments of wavelengths and/or positions and angles are made dynamically in real time to maintain the combination of the plurality input beams into a single high-quality output beam.

摘要翻译： 在多个高功率光纤激光器中对光束进行光束组合的装置和方法，其在一些实施例中使用两个基本相同的衍射光栅，并联的相互补偿的结构，以组合多个独立的并行输入光束， 不同的连续更高的波长成为高质量的单个输出光束。 在其他实施例中，使用单个衍射光栅来组合多个不同的波长，其中输入激光束从非常窄的线宽源获得以减少色散。 在一些实施例中，实时动态地进行波长和/或位置和角度的诊断和调整，以将多个输入光束的组合保持为单个高质量输出光束。

公开(公告)号：US08472763B1

公开(公告)日：2013-06-25

申请号：US13043342

申请日：2011-03-08

申请人： Anping Liu ,  Eric C. Honea ,  Charles A. Lemaire ,  Roy D. Mead ,  Christopher D. Brooks ,  Andrew J. W. Brown ,  Charles E. Hamilton ,  Thomas H. Loftus ,  Fabio Di Teodoro

发明人： Anping Liu ,  Eric C. Honea ,  Charles A. Lemaire ,  Roy D. Mead ,  Christopher D. Brooks ,  Andrew J. W. Brown ,  Charles E. Hamilton ,  Thomas H. Loftus ,  Fabio Di Teodoro

IPC分类号： G02B6/34 ,  G02B6/26 ,  G02B4/42

CPC分类号： G02B6/3853 ,  C03B37/10 ,  G02B6/02328 ,  G02B6/02347 ,  G02B6/02376 ,  G02B6/02385 ,  G02B6/3826 ,  H01S3/005 ,  H01S3/0064 ,  H01S3/0078 ,  H01S3/06704 ,  H01S3/06708 ,  H01S3/06729 ,  H01S3/06741 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/094007

摘要： A method and apparatus use a photonic-crystal fiber having a very large core while maintaining a single transverse mode. In some fiber lasers and amplifiers having large cores problems exist related to energy being generated at multiple-modes (i.e., polygamy), and of mode hopping (i.e., promiscuity) due to limited control of energy levels and fluctuations. The problems of multiple-modes and mode hopping result from the use of large-diameter waveguides, and are addressed by the invention. This is especially true in lasers using large amounts of energy (i.e., lasers in the one-megawatt or more range). By using multiple small waveguides in parallel, large amounts of energy can be passed through a laser, but with better control such that the aforementioned problems can be reduced. An additional advantage is that the polarization of the light can be maintained better than by using a single fiber core.

摘要翻译： 一种方法和装置使用具有非常大核心的光子晶体光纤，同时保持单个横向模式。 在一些光纤激光器和具有大的核心问题的放大器存在与在多模式（即一夫多妻制）下产生的能量以及由于能量水平和波动的有限控制而导致的模式跳变（即，混乱）有关的问题。 使用大直径波导导致多模和跳频的问题，并由本发明解决。 在使用大量能量的激光器（即，1兆瓦或更大范围的激光器）中尤其如此。 通过平行地使用多个小波导，可以将大量能量通过激光器，但是具有更好的控制，从而可以减少上述问题。 另外的优点是可以比通过使用单个纤芯更好地保持光的偏振。

公开(公告)号：US07233442B1

公开(公告)日：2007-06-19

申请号：US11342337

申请日：2006-01-26

申请人： Andrew J. W. Brown ,  Eric C. Honea ,  Thomas H. Loftus ,  Roy D. Mead ,  Charles E. Hamilton ,  Anping Liu ,  Charles A. Lemaire

发明人： Andrew J. W. Brown ,  Eric C. Honea ,  Thomas H. Loftus ,  Roy D. Mead ,  Charles E. Hamilton ,  Anping Liu ,  Charles A. Lemaire

IPC分类号： G02B27/64

CPC分类号： G02B27/1086 ,  G02B27/1006 ,  G02B27/108 ,  G02B27/123 ,  G02B27/144 ,  G02B27/145

摘要： Apparatus and method for spectral-beam combining light from a plurality of high-power fiber lasers that, in some embodiments, use two substantially identical diffraction gratings in a parallel, mutually compensating configuration to combine a plurality of separate parallel input beams each having a slightly different successively higher wavelength into a single output beam of high quality. In other embodiments, a single diffraction grating is used to combine a plurality of different wavelengths, wherein the input laser beams are obtained from very narrow linewidth sources to reduce chromatic dispersion. In some embodiments, diagnostics and adjustments of wavelengths and/or positions and angles are made dynamically in real time to maintain the combination of the plurality input beams into a single high-quality output beam.

摘要翻译： 在多个高功率光纤激光器中对光束进行光束组合的装置和方法，其在一些实施例中使用两个基本相同的衍射光栅，并联的相互补偿的结构，以组合多个独立的并行输入光束， 不同的连续更高的波长成为高质量的单个输出光束。 在其他实施例中，使用单个衍射光栅来组合多个不同的波长，其中输入激光束从非常窄的线宽源获得以减少色散。 在一些实施例中，实时动态地进行波长和/或位置和角度的诊断和调整，以将多个输入光束的组合保持为单个高质量输出光束。

公开(公告)号：US07199924B1

公开(公告)日：2007-04-03

申请号：US11342336

申请日：2006-01-26

申请人： Andrew J. W. Brown ,  Eric C. Honea ,  Thomas H. Loftus ,  Roy D. Mead ,  Charles E. Hamilton ,  Anping Liu ,  Charles A. Lemaire

发明人： Andrew J. W. Brown ,  Eric C. Honea ,  Thomas H. Loftus ,  Roy D. Mead ,  Charles E. Hamilton ,  Anping Liu ,  Charles A. Lemaire

IPC分类号： H04J14/02 ,  G02B27/64

CPC分类号： H01S3/2383 ,  G02B6/2931 ,  G02B27/1006 ,  G02B27/108 ,  G02B27/1086 ,  G02B27/123 ,  G02B27/144 ,  G02B27/145 ,  H01S3/005 ,  H01S3/0675 ,  H01S3/08009 ,  H01S3/2308 ,  H01S3/2391

摘要： Apparatus and method for spectral-beam combining light from a plurality of high-power fiber lasers that, in some embodiments, use two substantially identical diffraction gratings in a parallel, mutually compensating configuration to combine a plurality of separate parallel input beams each having a slightly different successively higher wavelength into a single output beam of high quality. In other embodiments, a single diffraction grating is used to combine a plurality of different wavelengths, wherein the input laser beams are obtained from very narrow linewidth sources to reduce chromatic dispersion. In some embodiments, diagnostics and adjustments of wavelengths and/or positions and angles are made dynamically in real time to maintain the combination of the plurality input beams into a single high-quality output beam.

摘要翻译： 在多个高功率光纤激光器中对光束进行光束组合的装置和方法，其在一些实施例中使用两个基本相同的衍射光栅，并联的相互补偿的结构，以组合多个独立的并行输入光束， 不同的连续更高的波长成为高质量的单个输出光束。 在其他实施例中，使用单个衍射光栅来组合多个不同的波长，其中输入激光束从非常窄的线宽源获得以减少色散。 在一些实施例中，实时动态地进行波长和/或位置和角度的诊断和调整，以将多个输入光束的组合保持为单个高质量输出光束。

公开(公告)号：US08953647B1

公开(公告)日：2015-02-10

申请号：US12799982

申请日：2010-04-28

申请人： Roy D. Mead ,  John D. Minelly ,  Eric C. Honea

发明人： Roy D. Mead ,  John D. Minelly ,  Eric C. Honea

IPC分类号： H01S3/30

CPC分类号： G01S17/89 ,  G01B11/2518 ,  G01B11/28 ,  G01S7/4813 ,  H01S3/0078 ,  H01S3/0092 ,  H01S3/06754 ,  H01S3/06791 ,  H01S3/08027 ,  H01S3/094003 ,  H01S3/107 ,  H01S3/11 ,  H01S3/115 ,  H01S3/1616 ,  H04B10/80 ,  H04B10/808

摘要： An apparatus, method and associated fiber-laser architectures for high-power pulsed operation and pumping wavelength-conversion devices. Some embodiments generate blue laser light by frequency quadrupling infrared (IR) light from Tm-doped gain fiber using non-linear wavelength conversion. Some embodiments use a fiber MOPA configuration to amplify a seed signal from a semiconductor laser or ring fiber laser. Some embodiments use the frequency-quadrupled blue light for underwater communications, imaging, and/or object and anomaly detection. Some embodiments amplitude modulate the IR seed signal to encode communication data sent to or from a submarine once the modulated light has its wavelength quartered. Other embodiments transmit blue-light pulses in a scanned pattern and detect scattered light to measure distances to objects in a raster-scanned underwater volume, which in turn are used to generate a data structure representing a three-dimensional rendition of the underwater scene being imaged for viewing by a person or for other software analysis.

摘要翻译： 一种用于高功率脉冲操作和泵浦波长转换器件的装置，方法和相关的光纤 - 激光器架构。 一些实施例通过使用非线性波长转换从Tm掺杂的增益光纤的红外（IR）光的四倍频率产生蓝色激光。 一些实施例使用光纤MOPA配置来放大来自半导体激光器或环形光纤激光器的种子信号。 一些实施例使用频率四倍的蓝光用于水下通信，成像和/或对象和异常检测。 一些实施例，一旦调制的光具有其波长四分之一，幅度调制IR种子信号以编码发送到潜艇或从潜艇发送的通信数据。 其他实施例以扫描的图案传输蓝光脉冲，并且检测散射光以测量光栅扫描的水下体积中的物体的距离，其又被用于生成表示被成像的水下场景的三维再现的数据结构 供人观看或进行其他软件分析。

公开(公告)号：US08441718B2

公开(公告)日：2013-05-14

申请号：US12624327

申请日：2009-11-23

申请人： Roy D. Mead

发明人： Roy D. Mead

IPC分类号： G02F1/35 ,  H01S3/00

CPC分类号： H01S3/0675 ,  F41H13/0056 ,  G02B6/022 ,  H01S3/005 ,  H01S3/094015 ,  H01S3/094046 ,  H01S3/09408 ,  H01S3/09415 ,  H01S3/10092 ,  H01S3/1053 ,  H01S3/1055 ,  H01S3/11 ,  H01S3/2383 ,  H01S3/2391 ,  H01S3/302

摘要： Fiber-laser light is Raman shifted to eye-safer wavelengths prior to spectral beam combination, enabling a high-power, eye-safer wavelength directed-energy (DE) system. The output of Ytterbium fiber lasers is not used directly for spectral beam combining. Rather, the power from the Yb fiber lasers is Raman-shifted to longer wavelengths, and these wavelengths are then spectrally beam combined. Raman shifting is most readily accomplished with a “cascaded Raman converter,” in which a series of nested fiber cavities is formed using fiber Bragg gratings.

摘要翻译： 在光束组合之前，光纤激光是拉曼转移到更安全的波长，实现了高功率，更安全的波长定向能（DE）系统。 镱光纤激光器的输出不直接用于光束组合。 相反，来自Yb光纤激光器的功率是拉曼偏移到更长的波长，并且这些波长然后是光谱波束组合。 使用“级联拉曼转换器”最容易实现拉曼移位，其中使用光纤布拉格光栅形成一系列嵌套光纤腔。