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1. 发明授权

US06445491B1 Method and apparatus for optical sectioning and imaging using time-gated parametric image amplification 有权
公开(公告)号：US06445491B1
公开(公告)日：2002-09-03
申请号：US09239667
申请日：1999-01-29
申请人： Gregg Sucha , Anand Hariharan , Donald J. Harter , Jeff Squier
发明人： Gregg Sucha , Anand Hariharan , Donald J. Harter , Jeff Squier
IPC分类号： G06F139
摘要： An optical parametric amplifier pumped by ultrashort optical pulses provides time-gated image amplification or time-gated image frequency conversion, resulting in optical sectioning of an object under test and/or background rejection of improperly timed light. An ultrashort laser pulse of one frequency is used to illuminate an object under test. An ultrashort pulse light beam at a signal frequency transmitted through or scattered from the object is optically mixed with an ultrashort laser pulse at a pump frequency in a nonlinear optical medium. This mixing produces an amplified image of a particular optical section of the object at the signal frequency in addition to producing a frequency converted image of the same optical section at an idler frequency. This time-gated amplification can be used in conjunction with a confocal imaging system, or a conventional imaging system. The resolution of optical sectioning is determined by the temporal widths of the signal and pump pulses and by the group velocity walkoff in the nonlinear medium. By illuminating the target with a train of closely spaced ultrashort pulses, an image of multiple sections can be amplified and downconverted within a single laser shot, giving a contour image of the target. The signal light can also be fluorescence from the object, excited by a short laser pulse, either through single-photon or multi-photon absorption. In this case, the signal light is incoherent with respect to the pump light. By using quasi-phase-matched nonlinear optical crystals as the amplifying medium, advantages such as an increased acceptance angle and lower pump thresholds are obtained.

2. 发明授权

US5479422A Controllabel dual-wavelength operation of modelocked lasers 失效
标题翻译：锁模激光器的双波长操作控制
公开(公告)号：US5479422A
公开(公告)日：1995-12-26
申请号：US289216
申请日：1994-08-12
申请人： Martin E. Fermann , Gregg Sucha , Donald J. Harter
发明人： Martin E. Fermann , Gregg Sucha , Donald J. Harter
IPC分类号： G02F1/35 , H01S3/06 , H01S3/08 , H01S3/098 , H01S3/108
CPC分类号： H01S3/1112 , H01S3/0805 , H01S3/0809 , H01S3/0811 , H01S3/082 , H01S3/0943 , H01S3/1115 , H01S3/1611
摘要： A laser system that enables dual-wavelength asynchronous modelocked operation with controllable repetition rates reduces gain competition and wavelength coupling with either inhomogeneously or homogeneously broadened gain media. Another purpose of the laser system is to minimize pulse interaction effects. The system includes a laser excitation device for generating output wavelengths from the gain medium with non-uniform gain profile. Further, the system includes devices for modelocking and coupling the wavelengths generated by the gain medium. The system includes at least one laser cavity for each of the generated wavelengths.
摘要翻译：激光系统能够实现具有可控重复频率的双波长异步模式锁定操作，可以减少不均匀或均匀扩展的增益介质的增益竞争和波长耦合。激光系统的另一个目的是最小化脉冲相互作用效应。该系统包括用于从具有不均匀增益分布的增益介质产生输出波长的激光激发装置。此外，该系统包括用于锁定和耦合由增益介质产生的波长的装置。该系统包括用于每个所产生的波长的至少一个激光腔。

3. 再颁专利

USRE45177E1 Quasi-phase-matched parametric chirped pulse amplification systems 有权
标题翻译：准相位匹配参数啁啾脉冲放大系统
公开(公告)号：USRE45177E1
公开(公告)日：2014-10-07
申请号：US10396815
申请日：2003-03-26
申请人： Almantas Galvanauskas , Donald Harter , Gregg Sucha
发明人： Almantas Galvanauskas , Donald Harter , Gregg Sucha
IPC分类号： H01S3/10 , H01S3/091
CPC分类号： G02F1/39 , A61B18/22 , A61C1/0046 , B23K26/0624 , G02F2001/3548 , G02F2001/392 , H01S3/0057 , H01S3/0604 , H01S3/115
摘要： Use of quasi-phase-matched (QPM) materials for parametric chirped pulse amplification (PCPA) substantially reduces the required pump peak power and pump brightness, allowing exploitation of spatially-multimode and long duration pump pulses. It also removes restrictions on pump wavelength and amplification bandwidth. This allows substantial simplification in pump laser design for a high-energy PCPA system and, consequently, the construction of compact diode-pumped sources of high-energy ultrashort optical pulses. Also, this allows elimination of gain-narrowing and phase-distortion limitations on minimum pulse duration, which typically arise in a chirped pulse amplification system. One example of a compact source of high-energy ultrashort pulses is a multimode-core fiber based PCPA system. Limitations on pulse energy due to the limited core size for single-mode fibers are circumvented by using large multimode core. Limitations on pulse duration and beam quality due to multimode core are circumvented by using a PCPA scheme. Additionally, the large core of the multimode fiber facilitates cladding-pumping by inexpensive and high-power multiple-mode laser diodes.
摘要翻译：使用准相位匹配（QPM）材料进行参数啁啾脉冲放大（PCPA），大大降低了所需的泵浦峰值功率和泵浦亮度，从而允许利用空间多模和长时间泵浦脉冲。它还消除了对泵浦波长和放大带宽的限制。这大大简化了用于高能量PCPA系统的泵浦激光器设计，并因此实现了高能量超短脉冲光源的紧凑型二极管泵浦源的构建。此外，这允许消除通常在啁啾脉冲放大系统中出现的最小脉冲持续时间上的增益变窄和相位失真的限制。紧凑型高能超短脉冲源的一个例子是基于多模核心光纤的PCPA系统。通过使用大型多模核，可以避免由于单模光纤尺寸有限引起的脉冲能量限制。通过使用PCPA方案可以避免由多模核引起的脉冲持续时间和光束质量的限制。此外，多模光纤的大芯片有助于通过廉价和大功率多模激光二极管进行包层泵浦。

4. 发明申请

US20050286569A1 Resonant fabry-perot semiconductor saturable absorbers and two photon absorption power limiters 有权
标题翻译：共振半透半导体饱和吸收器和两个光子吸收功率限制器
公开(公告)号：US20050286569A1
公开(公告)日：2005-12-29
申请号：US11197852
申请日：2005-08-05
申请人： Min Jiang , Donald Harter , Gregg Sucha , Martin Fermann
发明人： Min Jiang , Donald Harter , Gregg Sucha , Martin Fermann
IPC分类号： G02F1/35 , H01S3/06 , H01S3/067 , H01S3/08 , H01S3/094 , H01S3/098 , H01S3/106 , H01S3/11 , H01S3/16
CPC分类号： H01S3/1118 , G02F1/3523 , H01S3/067 , H01S3/08059 , H01S3/094003 , H01S3/1063 , H01S3/1608
摘要： An intracavity resonant Fabry-Perot saturable absorber (R-FPSA) induces modelocking in a laser such as a fiber laser. An optical limiter such as a two photon absorber (TPA) can be used in conjunction with the R-FPSA, so that Q-switching is inhibited, resulting in laser output that is cw modelocked. By using both an R-FPSA and a TPA, the Q-switched modelocked behavior of a fiber laser is observed to evolve into cw modelocking.
摘要翻译：腔内共振法布里 - 珀罗可饱和吸收体（R-FPSA）在诸如光纤激光器的激光器中诱导锁模。诸如双光子吸收器（TPA）的光限制器可以与R-FPSA一起使用，使得Q开关被禁止，导致cw锁模的激光输出。通过使用R-FPSA和TPA，观察到光纤激光器的Q开关模式锁定行为演变成cw锁模。

5. 发明申请

US20090190933A1 DISPERSION AND NONLINEAR COMPENSATOR FOR OPTICAL DELIVERY FIBER 审中-公开
标题翻译：用于光纤传输光纤的分散和非线性补偿器
公开(公告)号：US20090190933A1
公开(公告)日：2009-07-30
申请号：US12302644
申请日：2007-06-01
申请人： Greg Fichter , Gregg Sucha , David Zimdars , Steven Williamson
发明人： Greg Fichter , Gregg Sucha , David Zimdars , Steven Williamson
IPC分类号： H04B10/00
CPC分类号： H04B10/2513
摘要： A system for dispersion compensation in a terahertz system includes an optical fiber configured to transmit an optical pulse, a compensator optically coupled to the optical fiber, the compensator configured to compensate for a dispersion of the optical pulse caused as the optical pulse propagates through the optical fiber, and an optically induced terahertz device optically coupled to the compensator, whereby the optically induced terahertz device is configured to transmit or receive terahertz radiation.
摘要翻译：一种用于太赫兹系统中的色散补偿的系统包括被配置为传输光脉冲的光纤，光学耦合到光纤的补偿器，补偿器被配置为补偿当光脉冲通过光学器件传播时引起的光脉冲的色散光纤和光学耦合到补偿器的光学诱导太赫兹装置，由此光学诱导的太赫兹装置被配置为发射或接收太赫兹辐射。

6. 发明授权

US06208458B1 Quasi-phase-matched parametric chirped pulse amplification systems 失效
标题翻译：准相位匹配参数啁啾脉冲放大系统
公开(公告)号：US06208458B1
公开(公告)日：2001-03-27
申请号：US09116241
申请日：1998-07-16
申请人： Almantas Galvanauskas , Donald Harter , Gregg Sucha
发明人： Almantas Galvanauskas , Donald Harter , Gregg Sucha
IPC分类号： H01S310
CPC分类号： G02F1/39 , A61B18/22 , A61C1/0046 , B23K26/0624 , B23K26/40 , B23K2101/40 , B23K2103/50 , G02F2001/3548 , G02F2001/392 , H01S3/0057 , H01S3/0604 , H01S3/115
摘要： Use of quasi-phase-matched (QPM) materials for parametric chirped pulse amplification (PCPA) substantially reduces the required pump peak power and pump brightness, allowing exploitation of spatially-multimode and long duration pump pulses. It also removes restrictions on pump wavelength and amplification bandwidth. This allows substantial simplification in pump laser design for a high-energy PCPA system and, consequently, the construction of compact diode-pumped sources of high-energy ultrashort optical pulses. Also, this allows elimination of gain-narrowing and phase-distortion limitations on minimum pulse duration, which typically arise in a chirped pulse amplification system. One example of a compact source of high-energy ultrashort pulses is a multimode-core fiber based PCPA system. Limitations on pulse energy due to the limited core size for single-mode fibers are circumvented by using large multimode core. Limitations on pulse duration and beam quality due to multimode core are circumvented by using a PCPA scheme. Additionally, the large core of the multimode fiber facilitates cladding-pumping by inexpensive and high-power multiple-mode laser diodes.
摘要翻译：使用准相位匹配（QPM）材料进行参数啁啾脉冲放大（PCPA）大大降低了所需的泵浦峰值功率和泵浦亮度，从而允许利用空间多模和长持续时间的泵浦脉冲。它还消除了对泵浦波长和放大带宽的限制。这大大简化了用于高能量PCPA系统的泵浦激光器设计，并因此实现了高能量超短脉冲光源的紧凑型二极管泵浦源的构建。此外，这允许消除通常在啁啾脉冲放大系统中出现的最小脉冲持续时间上的增益变窄和相位失真的限制。紧凑型高能超短脉冲源的一个例子是基于多模核心光纤的PCPA系统。通过使用大型多模核，可以避免由于单模光纤尺寸有限引起的脉冲能量限制。通过使用PCPA方案可以避免由多模核引起的脉冲持续时间和光束质量的限制。此外，多模光纤的大芯片有助于通过廉价和大功率多模激光二极管进行包层泵浦。

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