公开(公告)号：US07292387B2

公开(公告)日：2007-11-06

申请号：US11332555

申请日：2006-01-12

申请人： Hanna J. Hoffman ,  David S. Spence ,  Alan B. Petersen ,  James D. Kafka

发明人： Hanna J. Hoffman ,  David S. Spence ,  Alan B. Petersen ,  James D. Kafka

IPC分类号： G02F1/35 ,  G02F2/02

CPC分类号： G02F1/35 ,  G02F1/3534 ,  G02F1/3544

摘要： Frequency conversion methods are taught wherein non-collinear phase matching configurations may be implemented in non-linear crystals used in three wave mixing processes such that the frequency conversion efficiency is enhanced through walk-off compensation while also maximizing conversion efficiency. The harmonic conversion techniques are especially applicable to sum frequency process, and in particular to third harmonic generation.

摘要翻译： 提出了变频方法，其中可以在三波混频处理中使用的非线性晶体中实现非共线相位匹配配置，使得通过离散补偿增强频率转换效率，同时最大化转换效率。 谐波转换技术特别适用于和频处理，特别适用于三次谐波生成。

公开(公告)号：US06697390B2

公开(公告)日：2004-02-24

申请号：US10061946

申请日：2002-02-01

申请人： James D. Kafka ,  Alan B. Petersen ,  Karl Markert

发明人： James D. Kafka ,  Alan B. Petersen ,  Karl Markert

IPC分类号： H01S310

CPC分类号： G02F1/3544 ,  G02F2001/3546 ,  H01S3/109 ,  H01S3/1611 ,  H01S3/1673 ,  H01S3/2308

摘要： A laser system includes a high reflector and an output coupler that define a laser oscillator, which produces a fundamental beam. A harmonic generator is positioned to receive at least a portion of the fundamental beam and produce a harmonic beam. The harmonic generator is configured to operate at a temperature selected to provide a least amount of change of a selected parameter of the harmonic beam for the longest period of time. Harmonic beam parameters can include the size and location of the harmonic beam waist, and the divergence of the harmonic beam.

摘要翻译： 激光系统包括高反射器和输出耦合器，其限定产生基波束的激光振荡器。 谐波发生器被定位成接收基波束的至少一部分并产生谐波束。 谐波发生器被配置为在所选择的温度下操作以在最长时间段内提供谐波束的选定参数的最小量的改变。 谐波束参数可以包括谐波束腰的大小和位置以及谐波束的发散。

公开(公告)号：US06822978B2

公开(公告)日：2004-11-23

申请号：US10194439

申请日：2002-07-12

申请人： James D. Kafka ,  David E. Spence

发明人： James D. Kafka ,  David E. Spence

IPC分类号： H01S3098

CPC分类号： H01S3/1112 ,  B23K26/0624 ,  B23K26/40 ,  B23K2101/40 ,  B23K2103/50 ,  G01N21/9501 ,  H01S3/06741 ,  H01S3/0941 ,  H01S3/09415 ,  H01S3/1106 ,  H01S3/1673 ,  H01S3/23 ,  H01S3/2316 ,  H01S3/2383

摘要： A laser apparatus includes a modelocked laser system with a high reflector and an output coupler that define an oscillator cavity. An output beam is produced from the oscillator cavity. A gain medium and a modelocking device are positioned in the oscillator cavity. A diode pump source produces a pump beam that is incident on the gain medium. A second harmonic generator is coupled to the oscillator cavity. A third harmonic generator that produces a UV output beam, is coupled to the second harmonic generator. A photonic crystal fiber is provided with a proximal end coupled to the laser system. A delivery device is coupled to a distal portion of the photonic crystal fiber.

摘要翻译： 激光装置包括具有高反射器的锁模激光系统和限定振荡器腔的输出耦合器。 输出光束由振荡器腔产生。 增益介质和锁模装置位于振荡器腔中。 二极管泵浦源产生入射在增益介质上的泵浦光束。 二次谐波发生器耦合到振荡器腔。 产生UV输出光束的三次谐波发生器耦合到二次谐波发生器。 光子晶体光纤具有耦合到激光系统的近端。 递送装置耦合到光子晶体光纤的远端部分。

公开(公告)号：US06246706B1

公开(公告)日：2001-06-12

申请号：US09322803

申请日：1999-05-27

申请人： James D. Kafka ,  Bruce Craig

发明人： James D. Kafka ,  Bruce Craig

IPC分类号： H01S310

CPC分类号： G03F7/704

摘要： A laser writing system includes a high reflector and an output coupler that define an oscillator cavity. A gain medium and a mode locking device are positioned in the oscillator cavity. A diode pump source produces a pump beam that is incident on the gain medium and an output beam is produced. A support holds a workpiece. Means are provided for directing the output beam across the workpiece.

摘要翻译： 激光写入系统包括高反射器和限定振荡器腔的输出耦合器。 增益介质和模式锁定装置位于振荡器腔中。 二极管泵浦源产生入射在增益介质上并且产生输出光束的泵浦光束。 支撑件保持工件。 提供了用于将输出光束引导穿过工件的装置。

公开(公告)号：US4942582A

公开(公告)日：1990-07-17

申请号：US341922

申请日：1989-04-24

申请人： Gregory J. Kintz ,  Thomas M. Baer ,  James D. Kafka

发明人： Gregory J. Kintz ,  Thomas M. Baer ,  James D. Kafka

IPC分类号： H01S3/0941 ,  H01S3/109 ,  H01S3/16

CPC分类号： H01S3/09415 ,  H01S3/0621 ,  H01S3/16 ,  H01S3/109 ,  H01S3/1611 ,  H01S3/1673

摘要： A solid state laser including a block of Nd:YVO.sub.2, Nd:YSAG, or Nd:YAB laser material having a cavity-defining mirror at one of its end surfaces is pumped by a laser diode pumping source having narrow bandwidth and is caused to lase in a single longitudinal mode by controlling the relationship between the pump power, the bandwidth of the lasing transition within the laser material, and the absorption depth of the pump radiation within the laser material.

摘要翻译： 包括Nd：YVO2，Nd：YSAG或Nd：YAB激光材料块在其端表面之一具有空腔限定镜的固体激光器由具有窄带宽的激光二极管泵浦源泵浦，并被引入 通过控制泵功率，激光材料内的激光转换的带宽与激光材料内的泵浦辐射的吸收深度之间的关系，以单一纵向模式。

公开(公告)号：US4847850A

公开(公告)日：1989-07-11

申请号：US62804

申请日：1987-06-15

申请人： James D. Kafka ,  Mark Linne ,  Thomas M. Baer

发明人： James D. Kafka ,  Mark Linne ,  Thomas M. Baer

IPC分类号： H01S3/0941 ,  H01S3/11 ,  H01S3/117

CPC分类号： H01S3/025 ,  H01S3/09415 ,  H01S3/117

摘要： A miniaturized Q-switch is added to the resonant cavity of a compact laser diode pumped solid state laser to produce short high peak power pulses which are input into a single mode optical fiber to form a compact continuum generator. Q-switching the compact laser diode pumped solid state lasers takes advantage of the relatively high gain and short cavity length to provide a desirable combination of pulsewidth and pulse energy. Nd:YAG or Nd:YLF are useful solid state laser materials for Q-switching, or other longer lifetime rare earth ions such as erbium or holmium for greater energy storage. The Q-switch is formed of a material such as TeO.sub.2, SF.sub.10, or LiNbO.sub.3 with an acoustooptic figure of merit substantially greater tha fused silica. The high peak powers of the lasers are sufficient to exceed the threshold for Raman conversion in the fiber which produces a series of red shifted bands ending in a continuum by stimulated Raman scattering.

摘要翻译： 将小型化Q开关添加到紧凑型激光二极管泵浦固态激光器的谐振腔中，以产生短的高峰值功率脉冲，其输入到单模光纤以形成紧凑的连续发生器。 Q切换紧凑型激光二极管泵浦固态激光器利用相对较高的增益和短腔长度来提供脉冲宽度和脉冲能量的期望组合。 Nd：YAG或Nd：YLF是用于Q开关或其他更长寿命的稀土离子（例如铒或钬）的有用的固态激光材料，用于更大的能量存储。 Q开关由诸如TeO 2，SF 10或LiNbO 3的材料形成，其声光特性值大大高于熔融二氧化硅。 激光器的高峰值功率足以超过光纤中拉曼转换的阈值，其产生通过受激拉曼散射在连续体中结束的一系列红移带。

公开(公告)号：US08902939B2

公开(公告)日：2014-12-02

申请号：US13011780

申请日：2011-01-21

申请人： James D. Kafka ,  Ching-Yuan Chien ,  Yujun Deng ,  Andrei C. Florean ,  David E. Spence ,  Jianping Zhou

发明人： James D. Kafka ,  Ching-Yuan Chien ,  Yujun Deng ,  Andrei C. Florean ,  David E. Spence ,  Jianping Zhou

IPC分类号： H01S3/10 ,  H01S3/00 ,  G01N21/35 ,  G01N21/39 ,  H01S3/108 ,  H01S3/11 ,  G02F1/39

CPC分类号： H01S3/1083 ,  G01N21/359 ,  G01N21/39 ,  G01N2021/399 ,  G02F1/39 ,  H01S3/0014 ,  H01S3/005 ,  H01S3/0057 ,  H01S3/0071 ,  H01S3/0092 ,  H01S3/1106 ,  H01S3/1118

摘要： A novel broadly tunable optical parametric oscillator is described for use in numerous applications including multi-photon microscopy. The optical parametric oscillator includes at least one sub-picosecond laser pump source configured to output a pump signal having a wavelength of about 650 nm or less and at least one type II optical parametric oscillator in optical communication with the pump source and configured to generate a single widely tunable pulsed optical signal. In one application, an optical system is in optical communication with the optical parametric oscillator and configured to direct at least a portion of the optical signal to a specimen, and at least one analyzing device is configured to receive a signal from the specimen in response to the optical signal.

摘要翻译： 描述了一种新颖的广泛可调光参量振荡器用于包括多光子显微镜在内的许多应用中。 所述光学参量振荡器包括至少一个亚皮秒激光泵浦源，其被配置为输出波长为约650nm或更小的泵浦信号，以及至少一个类型II光参量振荡器与所述泵浦源光学通信并被配置为产生 单个广泛可调脉冲光信号。 在一个应用中，光学系统与光学参量振荡器光学通信，并被配置为将光信号的至少一部分引导到样本，并且至少一个分析装置被配置为响应于 光信号。

公开(公告)号：US07027477B2

公开(公告)日：2006-04-11

申请号：US10232885

申请日：2002-08-30

申请人： Dirk Sutter ,  James D. Kafka

发明人： Dirk Sutter ,  James D. Kafka

IPC分类号： H01S3/091

CPC分类号： H01S3/09415 ,  H01S3/0405 ,  H01S3/042 ,  H01S3/0604 ,  H01S3/0606 ,  H01S3/0627 ,  H01S3/08072 ,  H01S3/1618

摘要： An optical system includes a diode pump source and a thin disk gain media. The thin disk gain media has first and second surfaces and is made of a material with an anisotropic thermal expansion. At least one of the first and second surfaces is a cooling surface. The thin disk gain media is cut at an angle to provide substantially the same thermal expansion coefficient in all directions lying in a plane that is parallel to the cooling surface. An optical coupler is positioned between the diode pump source and the thin disk gain media to direct an output from the diode pump source to the thin disk gain media.

摘要翻译： 光学系统包括二极管泵源和薄盘增益介质。 薄盘增益介质具有第一和第二表面，并且由具有各向异性热膨胀的材料制成。 第一和第二表面中的至少一个是冷却表面。 薄板增益介质以一定角度切割，以在平行于冷却表面的平面中的所有方向提供基本上相同的热膨胀系数。 光耦合器位于二极管泵浦源和薄盘增益介质之间，以将来自二极管泵浦源的输出引导到薄盘增益介质。

公开(公告)号：US06734387B2

公开(公告)日：2004-05-11

申请号：US10114337

申请日：2002-04-01

申请人： James D. Kafka ,  Mingwei Li

发明人： James D. Kafka ,  Mingwei Li

IPC分类号： B23K2638

CPC分类号： G01N21/9501 ,  B23K26/0624 ,  B23K26/364 ,  B23K26/40 ,  B23K2101/40 ,  B23K2103/42 ,  B23K2103/50 ,  H01S3/1106 ,  H01S3/1118 ,  H01S3/2316

摘要： A micro-machining apparatus includes a mode-locked, infrared laser system with a high reflector and an output coupler that define an oscillator cavity which produces an output beam. A gain medium and a mode locking device are positioned in the oscillator cavity. A diode pump source produces a pump beam that is incident on the gain medium. A second harmonic generator is coupled to the oscillator cavity. A third harmonic generator is coupled to the second harmonic generator and produces a UV output beam. An output beam directing apparatus directs the output beam to a polymeric surface of an article. At least a portion of the polymeric material is micro-machined by the output beam.

摘要翻译： 微加工设备包括具有高反射器的锁模式红外激光系统和限定产生输出光束的振荡器腔的输出耦合器。 增益介质和模式锁定装置位于振荡器腔中。 二极管泵浦源产生入射在增益介质上的泵浦光束。 二次谐波发生器耦合到振荡器腔。 三次谐波发生器耦合到二次谐波发生器并产生UV输出光束。 输出光束引导装置将输出光束引导到物品的聚合物表面。 聚合物材料的至少一部分被输出光束微加工。

公开(公告)号：US5847861A

公开(公告)日：1998-12-08

申请号：US239266

申请日：1994-05-06

申请人： James D. Kafka ,  Michael L. Watts ,  Jan-Willem J. Pieterse ,  Kevin K. Holsinger

发明人： James D. Kafka ,  Michael L. Watts ,  Jan-Willem J. Pieterse ,  Kevin K. Holsinger

IPC分类号： G02F1/39 ,  H01S3/094

CPC分类号： G02F1/39 ,  H01S3/094026

摘要： A synchronously pumped optical parametric oscillator (OPO) using a temperature tuned 90 degree phase matched LBO crystal is disclosed which provides a broad selection of output wavelengths. In one embodiment a Ti:sapphire pump source having a cavity length matched to the OPO cavity length pumps a cavity with an LBO crystal located at the cavity waist of the cavity mode. Resources are included to, tune the OPO to a desired wavelength, repetitively scan through a series of desired wavelengths, and adjust the cavity length to obtain a synchronous pumping condition and diagnose a wavelength at which the OPO is operating. A frequency doubled beam in the LBO crystal is generated as a substantially collinear alignment beam.

摘要翻译： 公开了使用温度调节的90度相位匹配的LBO晶体的同步泵浦光参量振荡器（OPO），其提供了广泛的输出波长选择。 在一个实施例中，具有与OPO腔体长度匹配的腔长度的Ti：蓝宝石泵浦源泵浦位于空腔模式的空腔腰部处的LBO晶体的空腔。 包括资源，将OPO调谐到期望的波长，重复扫描一系列期望的波长，并调整腔长度以获得同步泵浦状态并诊断OPO运行的波长。 产生LBO晶体中的倍频光束作为基本上共线的对准光束。