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61. 发明授权

US07483204B2 Inexpensive variable rep-rate source for high-energy, ultrafast lasers 有权
标题翻译：用于高能，超快速激光器的廉价可变转速源
公开(公告)号：US07483204B2
公开(公告)日：2009-01-27
申请号：US12003153
申请日：2007-12-20
申请人： Donald J. Harter
发明人： Donald J. Harter
IPC分类号： H04B10/17 , H01S3/00
CPC分类号： H01S3/0057 , G02B6/2932 , G02B6/29374 , H01S3/067 , H01S3/06708 , H01S3/06716 , H01S3/06725 , H01S3/0675 , H01S3/06754 , H01S3/06758 , H01S3/08013 , H01S3/094003 , H01S3/094076 , H01S3/0941 , H01S3/10046 , H01S3/11 , H01S3/1106 , H01S3/1608 , H01S3/1618 , H01S3/2308 , H01S5/0057 , H04B10/508
摘要： System for converting relatively long pulses from rep-rate variable ultrafast optical sources to shorter, high-energy pulses suitable for sources in high-energy ultrafast lasers. Fibers with positive group velocity dispersion (GVD) and self phase modulation are advantageously employed with the optical sources. These systems take advantage of the need for higher pulse energies at lower repetition rates so that such sources can be cost effective.
摘要翻译：用于将相对长的脉冲从代表性可变超快光源转换为适用于高能超快激光源的较短，高能脉冲的系统。具有正组速度色散（GVD）和自相位调制的光纤有利地与光源一起使用。这些系统利用对较低重复频率的较高脉冲能量的需要，使得这些源可以具有成本效益。

62. 发明申请

US20080285118A1 METHOD AND APPARATUS FOR CONTROLLING AND PROTECTING PULSED HIGH POWER FIBER AMPLIFIER SYSTEMS 有权
标题翻译：用于控制和保护脉冲高功率光纤放大器系统的方法和装置
公开(公告)号：US20080285118A1
公开(公告)日：2008-11-20
申请号：US12181390
申请日：2008-07-29
申请人： Salvatore F. Nati , Otho E. Ulrich, JR. , Gyu Choen Cho , Wayne A. Gillis , Donald J. Harter , Mark Bendett , Ingmar Hartl
发明人： Salvatore F. Nati , Otho E. Ulrich, JR. , Gyu Choen Cho , Wayne A. Gillis , Donald J. Harter , Mark Bendett , Ingmar Hartl
IPC分类号： H01S3/00
CPC分类号： H01S3/06779 , H01S3/06758 , H01S3/0941 , H01S3/10015 , H01S3/1003 , H01S3/10038 , H01S3/10046 , H01S3/105 , H01S3/1112 , H01S3/1305 , H01S3/1312 , H01S3/1394
摘要： An electronic circuit for controlling a laser system consisting of a pulse source and high power fiber amplifier is disclosed. The circuit is used to control the gain of the high power fiber amplifier system so that the amplified output pulses have predetermined pulse energy as the pulse width and repetition rate of the oscillator are varied. This includes keeping the pulse energy constant when the pulse train is turned on. The circuitry is also used to control the temperature of the high power fiber amplifier pump diode such that the wavelength of the pump diode is held at the optimum absorption wavelength of the fiber amplifier as the diode current is varied. The circuitry also provides a means of protecting the high power fiber amplifier from damage due to a loss of signal from the pulse source or from a pulse-source signal of insufficient injection energy.
摘要翻译：公开了一种用于控制由脉冲源和大功率光纤放大器组成的激光系统的电子电路。该电路用于控制高功率光纤放大器系统的增益，使得放大的输出脉冲具有预定的脉冲能量，因为振荡器的脉冲宽度和重复率是变化的。这包括当脉冲串打开时保持脉冲能量恒定。该电路还用于控制高功率光纤放大器泵浦二极管的温度，使得当二极管电流变化时，泵浦二极管的波长保持在光纤放大器的最佳吸收波长。电路还提供了保护大功率光纤放大器免受来自脉冲源的信号损失或由于注入能量不足的脉冲源信号的损害的手段。

63. 发明授权

US07394591B2 Utilization of Yb: and Nd: mode-locked oscillators in solid-state short pulse laser systems 有权
标题翻译：在固态短脉冲激光系统中利用Yb：和Nd：锁模振荡器
公开(公告)号：US07394591B2
公开(公告)日：2008-07-01
申请号：US10960923
申请日：2004-10-12
申请人： Donald J. Harter , Gyu C. Cho , Martin E. Fermann , Ingmar Hartl
发明人： Donald J. Harter , Gyu C. Cho , Martin E. Fermann , Ingmar Hartl
IPC分类号： H01S4/00 , H01S3/00
CPC分类号： H01S5/5045 , H01S3/005 , H01S3/0057 , H01S3/0078 , H01S3/0085 , H01S3/067 , H01S3/0675 , H01S3/06754 , H01S3/094042 , H01S3/10023 , H01S3/109 , H01S3/1616 , H01S3/1618 , H01S3/1643 , H01S3/235
摘要： An optimized Yb: doped fiber mode-locked oscillator and fiber amplifier system for seeding Nd: or Yb: doped regenerative amplifiers. The pulses are generated in the Yb: or Nd: doped fiber mode-locked oscillator, and may undergo spectral narrowing or broadening, wavelength converting, temporal pulse compression or stretching, pulse attenuation and/or lowering the repetition rate of the pulse train. The conditioned pulses are subsequently coupled into an Yb: or Nd: fiber amplifier. The amplified pulses are stretched before amplification in the regenerative amplifier that is based on an Nd: or Yb: doped solid-state laser material, and then recompressed for output.
摘要翻译：一种优化的Yb：掺杂光纤锁模振荡器和光纤放大器系统，用于种子Nd：或Yb：掺杂再生放大器。脉冲在Yb或Nd：掺杂光纤锁模振荡器中产生，并可能经历频谱变窄或变宽，波长转换，时间脉冲压缩或拉伸，脉冲衰减和/或降低脉冲序列的重复率。调节脉冲随后耦合到Yb或Nd：光纤放大器中。在基于Nd：或Yb：掺杂固态激光材料的再生放大器中，放大后的放大脉冲被拉伸，然后再压缩输出。

64. 发明授权

US07257302B2 In-line, high energy fiber chirped pulse amplification system 有权
标题翻译：在线高能纤维啁啾脉冲放大系统
公开(公告)号：US07257302B2
公开(公告)日：2007-08-14
申请号：US10608233
申请日：2003-06-30
申请人： Martin E. Fermann , Gennady Imeshev , Ingmar Hartl , Donald J. Harter
发明人： Martin E. Fermann , Gennady Imeshev , Ingmar Hartl , Donald J. Harter
IPC分类号： G02B6/02
CPC分类号： H01S3/06754 , H01S3/005 , H01S3/0057 , H01S3/0085 , H01S3/0092 , H01S3/06712 , H01S3/06725 , H01S3/094007 , H01S3/10015
摘要： By writing non-linear chirp into fiber Bragg gratings, greater control over dispersion compensation in CPA systems is obtained, such that, for example, the dispersion profile of the fiber Bragg grating and a bulk compressor may be matched. An iterative method of writing the fiber grating can reduce the group delay ripple to very low levels; and adaptive control of the fiber grating dispersion profile can further reduce these levels, while in addition offering greater acceptable yield in the manufacture of such gratings. Fiber Bragg gratings may be designed so as to provide customized pulse shapes optimized for various end uses, such as micromachining, for example, and may also be used to counteract gain-narrowing in a downstream amplifier.
摘要翻译：通过将非线性啁啾写入光纤布拉格光栅，可以获得对CPA系统中的色散补偿的更大控制，使得例如光纤布拉格光栅和大容量压缩机的色散曲线可以匹配。编写光纤光栅的迭代方法可以将组延迟纹波降低到非常低的水平; 并且光纤光栅色散轮廓的自适应控制可以进一步降低这些水平，同时在制造这种光栅时提供更大的可接受的产量。可以设计光纤布拉格光栅，以便提供针对各种最终用途（例如微加工）优化的定制脉冲形状，并且还可以用于抵消下游放大器中的增益变窄。

65. 发明申请

US20050105854A1 Optical fiber pump multiplexer 失效
标题翻译：光纤泵浦多路复用器
公开(公告)号：US20050105854A1
公开(公告)日：2005-05-19
申请号：US10705817
申请日：2003-11-13
申请人： Liang Dong , Donald J. Harter
发明人： Liang Dong , Donald J. Harter
IPC分类号： G02B6/255 , G02B6/28 , G02B6/26
CPC分类号： G02B6/2551 , G02B6/2856 , H01S3/06754 , H01S3/094007 , H01S3/094053 , H01S3/09408
摘要： One or more single mode few-moded or multimode fibers are incorporated into a bundle to carry input to a fiber amplifier or output from a fiber amplifier or a fiber laser. The input is at the signal wavelength, which is the wavelength where amplification or lasing occurs. Each of the fibers in the bundle is cleaved individually or as a group and fiber ends are aligned in the same plane. The fiber amplifier or fiber laser may include a double clad fiber and the other fibers of the bundle couple light for cladding pumping. The device may also include a mode filter for controlling the output mode.
摘要翻译：一个或多个单模多模或多模光纤被并入到束中以将输入传送到光纤放大器或从光纤放大器或光纤激光器输出。输入信号波长为发生放大或激光的波长。束中的每个纤维单独地或作为一组裂解，并且纤维末端在同一平面中对准。光纤放大器或光纤激光器可以包括双包层光纤，并且该束的其它光纤耦合光以进行包层泵浦。该装置还可以包括用于控制输出模式的模式滤波器。

66. 发明授权

US6020591A Two-photon microscopy with plane wave illumination 失效
标题翻译：双光子显微镜与平面波照明
公开(公告)号：US6020591A
公开(公告)日：2000-02-01
申请号：US892843
申请日：1997-07-11
申请人： Donald J. Harter , Jeff A. Squier
发明人： Donald J. Harter , Jeff A. Squier
IPC分类号： G02B21/02 , G02B21/00 , G01N21/64
CPC分类号： G02B21/0084 , G02B21/0076
摘要： A two-photon fluorescence microscope employs two laser beams having pulses of respective wavelengths .lambda..sub.2 and .lambda..sub.3, which cause two-photon emission of a fluorophore when the pulses are spatially and temporally overlapping. The pulses of the two beams of wavelengths .lambda..sub.2 and .lambda..sub.3 are combined at some crossing angle .theta. within the specimen, causing two-photon absorption within a line-shaped region during each instant of overlap. As the pulses pass through each other, the overlapping line-shaped region moves such that a slice of the fluorophore-containing specimen is excited by two-photon absorption during the overlap period. Lateral scanning is effected without moving parts by adjusting the relative delay of the pulses in the two beams. When the crossing angle .theta. is set to 0, i.e., when the two beams are directed along the same axis, the pulses of the two beams form a pancake-shaped volume in which two-photon excitation occurs as the pulses spatially and temporally overlap while traveling in opposite directions. A two-dimensional detector, such as a two-dimensional charge coupled device (CCD) array, can be used to detect a two-dimensional portion of the specimen at one time without lateral scanning. A three-dimensional image can be produced by adjusting the time delay between the two pulses, thereby changing the location of the "pancake" volume created by the intersection of the two pulses.
摘要翻译：双光子荧光显微镜使用具有各自波长λ2和λ3的脉冲的两个激光束，当脉冲在空间上和时间上重叠时，其产生荧光团的双光子发射。波长λ2和λ3的两个波长的脉冲在样本内的某个交叉角度θ处组合，在每个重叠时刻内在线状区域内引起双光子吸收。当脉冲彼此通过时，重叠的线状区域移动，使得在重叠期间，含荧光团的样品的切片被双光子吸收激发。通过调整两个光束中的脉冲的相对延迟来实现横向扫描而不移动部分。当交叉角θ设置为0时，即当两个光束沿着相同的轴线被引导时，两个光束的脉冲形成薄饼状体积，其中双光子激发发生在脉冲空间和时间上重叠的同时沿相反方向行驶。诸如二维电荷耦合器件（CCD）阵列之类的二维检测器可用于一次检测样本的二维部分而不进行横向扫描。可以通过调整两个脉冲之间的时间延迟来产生三维图像，从而改变由两个脉冲的交点产生的“煎饼”体积的位置。

67. 发明授权

US5923686A Environmentally stable passively modelocked fiber laser pulse source 失效
公开(公告)号：US5923686A
公开(公告)日：1999-07-13
申请号：US876933
申请日：1997-06-16
申请人： Martin E. Fermann , Donald J. Harter
发明人： Martin E. Fermann , Donald J. Harter
IPC分类号： G02F1/35 , H01S3/06 , H01S3/067 , H01S3/098 , H01S3/11
CPC分类号： H01S3/067 , H01S3/08059 , H01S3/1112 , H01S3/1115 , Y10T29/49826
摘要： The present invention is directed to providing an environmentally stable, ultra-short pulse source. Exemplary embodiments relate to passively modelocked ultra-short fiber lasers which are insensitive to temperature variations and which possess only negligible sensitivity to pressure variations. Further, exemplary embodiments can be implemented in a cost-effective manner which render them commercially practical in unlimited applications. Arbitrary fiber lengths (e.g., on the order of 1 millimeter to 1 kilometer, or greater) can be used to provide an ultra-short pulse with a cost-effective architecture which is commercially practical.

68. 发明授权

US5778016A Scanning temporal ultrafast delay methods and apparatuses therefor 失效
公开(公告)号：US5778016A
公开(公告)日：1998-07-07
申请号：US602457
申请日：1996-02-16
申请人： Gregg D. Sucha , Martin E. Fermann , Donald J. Harter
发明人： Gregg D. Sucha , Martin E. Fermann , Donald J. Harter
IPC分类号： H01S3/10 , G01B11/24 , G01M11/00 , G01P3/80 , G01R13/34 , G01S7/48 , G01S7/484 , G01S7/486 , G01S17/10 , G01S17/50 , H01S3/02 , H01S3/06 , H01S3/07 , H01S3/098 , H01S3/105 , H01S3/13 , H01S3/139 , H01S3/23 , H01S3/00
CPC分类号： H01S3/2383 , G01P3/806 , G01R13/347 , G01S17/107 , G01S17/50 , G01S7/484 , G01S7/486 , G01S7/497 , H01S3/1398
摘要： The present invention is directed to methods and apparatuses for performing temporal scanning using ultra-short pulsewidth lasers in which only minimal (micro-scale) mechanical movement is required. The invention also relates to methods for obtaining high-accuracy timing calibration, on the order of femtoseconds. A dual laser system is disclosed in which the cavity of one or more of the lasers is dithered, by using a piezoelectric element. A Fabry-Perot etalon is used to generate a sequence of timing pulses used in conjunction with a laser beam produced by the laser having the dithered laser cavity. A correlator correlates a laser pulse from one of the lasers with the sequence of timing pulses to produce a calibrated time scale. The methods and apparatuses of the present invention are applicable to many applications requiring rapid scanning and time calibration, including, but not limited to metrology, characterization of charge dynamics in semiconductors, electro-optic testing of ultrafast electronic and optoelectronic devices, optical time domain reflectometry, and electro-optic sampling oscilloscopes.

69. 发明授权

US5235606A Amplification of ultrashort pulses with Nd:glass amplifiers pumped by alexandrite free running laser 失效
标题翻译：带有ND的超声波脉冲放大器：由ALEXANDRITE自由运行激光器抽出的玻璃放大器
公开(公告)号：US5235606A
公开(公告)日：1993-08-10
申请号：US784232
申请日：1991-10-29
申请人： Gerard A. Mourou , Jeffrey Squier , John S. Coe , Donald J. Harter
发明人： Gerard A. Mourou , Jeffrey Squier , John S. Coe , Donald J. Harter
IPC分类号： H01S3/00 , H01S3/094 , H01S3/23
CPC分类号： H01S3/2316 , H01S2301/04 , H01S3/0057 , H01S3/094 , H01S3/17
摘要： A system for producing ultra-high peak power pulses employs a plurality of solid state amplifying materials, such as Nd:glass, alexandrite, and Ti:sapphire, to achieve stretching of a pulse prior to amplification by a factor of approximately between 100 and 10,000. The time-stretched pulse is amplified by many orders of magnitude, illustratively 10.sup.9. After time-stretching and amplification, the pulse is then recompressed to its original duration. Pumping of the multiple solid-state elements is performed simultaneously using an alexandrite laser which is tunable between approximately 700 and 800 nm. The pumping energy has a pulse duration which is less than the fluorescence lifetime of the excited solid-state media.
摘要翻译：用于产生超高峰值功率脉冲的系统采用多种固态放大材料，例如Nd：玻璃，亚历山大和Ti：蓝宝石，以实现扩增之前的脉冲拉伸约100至10,000倍。时间延伸的脉冲被放大许多数量级，示例性地为109.在时间拉伸和放大之后，脉冲被再压缩到其原始持续时间。多个固态元件的泵送使用可调节在约700和800nm之间的白炽灯激光器同时进行。泵浦能量的脉冲持续时间小于激发的固态介质的荧光寿命。

70. 发明授权

US4070161A Double seal gate valve structure 失效
标题翻译：双密封闸阀结构
公开(公告)号：US4070161A
公开(公告)日：1978-01-24
申请号：US696874
申请日：1976-06-17
申请人： Donald J. Harter
发明人： Donald J. Harter
IPC分类号： F16K3/02 , C10J3/06 , F16K3/18
CPC分类号： F16K3/0272 , C10J3/30 , C10J2200/156 , C10J2200/36 , Y10T137/4358 , Y10T137/8359
摘要： A gate valve structure is shown embodying an elongate slide member movable within an elongate housing. The slide member carries a pair of annular seals spaced apart along the length of a valve body and has a bore therein extending through the valve body at a location between the seals. By linear movement of the slide member the bore and seals are each selectively registerable with aligned openings through the housing. This valve structure has operating and maintenance characteristics, which are particularly advantageous for use in the charging and/or discharging of fixed bed coal gasifiers.
摘要翻译：示出了门阀结构，其体现在细长壳体内可移动的细长滑动构件。滑动构件承载沿着阀体的长度间隔开的一对环形密封件，并且在其之间的位置处具有在其中延伸穿过阀体的孔。通过滑动构件的线性移动，孔和密封件各自可选择性地与通过壳体的对齐的开口对准地配准。该阀结构具有操作和维护特性，这对于用于固定床煤气化器的充放电特别有利。

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