公开(公告)号：US20050157382A1

公开(公告)日：2005-07-21

申请号：US11031500

申请日：2005-01-07

Applicant: James Kafka ,  Jianping Zhou ,  Juerg Aus-Der-Au ,  Kevin Holsinger ,  Ventzislav Stoev

Inventor： James Kafka ,  Jianping Zhou ,  Juerg Aus-Der-Au ,  Kevin Holsinger ,  Ventzislav Stoev

IPC: H01S3/042 ,  H01S3/0941 ,  H01S3/098 ,  H01S3/16 ,  H01S3/23

CPC classification number: H01S3/0941 ,  H01S3/0092 ,  H01S3/042 ,  H01S3/1022 ,  H01S3/1312 ,  H01S3/1618 ,  H01S3/1675 ,  H01S3/2308

Abstract: A directly diode-pumped amplifier system is disclosed which produces sub-picosecond pulses with an output power of 2 watts or more. Computer resources are coupled to the amplifier system and are configured to provide control of operating parameters of the amplifier system. An optional second harmonic generator is supplied to increase the contrast ratio and reduce the minimum focal spot size. This amplifier system can be utilized for material processing applications.

Abstract translation: 公开了直接二极管泵浦放大器系统，其产生输出功率为2瓦或更大的亚皮秒脉冲。 计算机资源耦合到放大器系统并且被配置为提供对放大器系统的操作参数的控制。 提供可选的二次谐波发生器以增加对比度并减小最小焦斑尺寸。 该放大器系统可用于材料处理应用。

公开(公告)号：US20050094679A1

公开(公告)日：2005-05-05

申请号：US10982664

申请日：2004-11-05

Applicant: James Kafka ,  David Spence

Inventor： James Kafka ,  David Spence

IPC: H01S3/10 ,  B23K26/06 ,  B23K26/40 ,  G01N21/95 ,  H01S3/00 ,  H01S3/0941 ,  H01S3/098 ,  H01S3/109 ,  H01S3/16 ,  H01S3/23

CPC classification number: 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

Abstract: 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.

Abstract translation: 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：US6016323A

公开(公告)日：2000-01-18

申请号：US727469

申请日：1996-10-21

Applicant: James Kafka ,  Vincent J. Newell ,  Michael Watts ,  James Clark

Inventor： James Kafka ,  Vincent J. Newell ,  Michael Watts ,  James Clark

IPC: H01S3/10 ,  H01S3/23

CPC classification number: G02F1/39 ,  H01S3/10092 ,  H01S3/2316

Abstract: An oscillator system is provided which produces a single mode output from a multimode seed beam and a multimode optical power source. The seed source employed in the oscillator system produces a multimode seed beam that is used to injection seed a multimode optical power source. The optical power source has a short cavity such that the longitudinal modes of the multimode optical power source are sufficiently spaced apart that a mode of the optical power source can be positioned relative to the multimode seed beam such that the beam does not significantly overlap with neighboring longitudinal modes of the optical power source. By positioning a single longitudinal mode to overlap with the seed beam a high energy single longitudinal mode output is produced. The oscillator system preferably includes an output controller loop which serves to center the longitudinal mode output of the optical power source relative to the center of the seed beam. The oscillator system also preferably includes a tuner controller which enables the oscillator system to scan over a series of wavelengths.

Abstract translation: PCT No.PCT / US95 / 07189 Sec。 371日期1996年10月21日 102（e）日期1996年10月21日PCT提交1995年6月6日PCT公布。 出版物WO96 / 08858 日期1996年3月21日提供了一种从多模种子束和多模光纤电源产生单模输出的振荡器系统。 在振荡器系统中使用的种子源产生用于向多模光功率源注入种子的多模种子光束。 光功率源具有短腔，使得多模光功率源的纵向模式充分间隔开，使得光功率源的模式可以相对于多模种子光束定位，使得光束不会与相邻的 光功率源的纵向模式。 通过将单个纵向模式定位以与种子束重叠，产生高能量单纵模输出。 振荡器系统优选地包括输出控制器回路，其用于使光功率源的纵向模式输出相对于种子束的中心居中。 振荡器系统还优选地包括使振荡器系统能够扫描一系列波长的调谐器控制器。

公开(公告)号：US20060050369A1

公开(公告)日：2006-03-09

申请号：US11128614

申请日：2005-05-14

Applicant: James Kafka ,  David Spence ,  Jianping Zhou ,  Ching-Yuan Chien ,  Juerg Aus der Au ,  Anton Krumm

Inventor： James Kafka ,  David Spence ,  Jianping Zhou ,  Ching-Yuan Chien ,  Juerg Aus der Au ,  Anton Krumm

IPC: H01S3/00

CPC classification number: H01S3/0057 ,  H01S3/0078 ,  H01S3/235

Abstract: A pulse width reduction apparatus for an optical system is disclosed and includes at least one birefringent optical element configured to selectively adjust a spectral modulation depth of an optical signal while leaving a spectral transmission function of the optical signal substantially constant

Abstract translation: 公开了一种用于光学系统的脉冲宽度降低装置，并且包括至少一个双折射光学元件，其被配置为选择性地调节光信号的光谱调制深度，同时保留光信号的光谱传输函数基本上恒定

公开(公告)号：US20050074041A1

公开(公告)日：2005-04-07

申请号：US10917830

申请日：2004-08-12

Applicant: Georg Sommerer ,  Alan Petersen ,  David Spence ,  James Kafka

Inventor： Georg Sommerer ,  Alan Petersen ,  David Spence ,  James Kafka

IPC: H01S3/04 ,  H01S3/042

CPC classification number: H01S3/042 ,  H01S3/0405

Abstract: An optical system includes a laser oscillator or a laser amplifier. The optical system includes a gain medium that is optically coupled to a pump source. A solid cooling element is in physical contact with a cooling surface of the gain medium. The gain medium and cooling element are held together using a low temperature contacting method. In a one embodiment the gain medium is a thin disk gain medium, the solid cooling-element is made from CVD-diamond, and the low temperature bonding technique is surface activated bonding.

Abstract translation: 光学系统包括激光振荡器或激光放大器。 光学系统包括光学耦合到泵浦源的增益介质。 固体冷却元件与增益介质的冷却表面物理接触。 增益介质和冷却元件使用低温接触方法保持在一起。 在一个实施例中，增益介质是薄盘增益介质，固体冷却元件由CVD金刚石制成，并且低温接合技术是表面活化的结合。

公开(公告)号：US5889800A

公开(公告)日：1999-03-30

申请号：US795442

申请日：1997-02-06

Applicant: James Kafka ,  Vincent J. Newell ,  Michael Watts ,  James Clark

Inventor： James Kafka ,  Vincent J. Newell ,  Michael Watts ,  James Clark

IPC: G02F1/39 ,  H01S3/10 ,  H01S3/23

CPC classification number: G02F1/39 ,  H01S3/10092 ,  H01S3/2316

Abstract: An oscillator system is provided which produces a single mode output from a multimode seed beam and a multimode optical power source. The seed source employed in the oscillator system produces a multimode seed beam that is used to injection seed a multimode optical power source. The optical power source has a short cavity such that the longitudinal modes of the multimode optical power source are sufficiently spaced apart that a mode of the optical power source can be positioned relative to the multimode seed beam such that the seed beam does not significantly overlap with neighboring longitudinal modes of the optical power source. By positioning a single longitudinal mode to overlap with the seed beam where the seed beam does not significantly overlap with neighboring longitudinal modes of the optical power source, a high energy single longitudinal mode output is produced. The optical power source should have an optical cavity length that is sufficiently short to cause the longitudinal modes of the multimode optical power source to be sufficiently spaced apart so that the multimode seed beam does not overlap with neighboring longitudinal modes of the optical power source. The oscillator system preferably includes an output controller loop which serves to center the longitudinal mode output of the optical power source relative to the center of the seed beam. The oscillator system also preferably includes a tuner controller which enables the oscillator system to scan over a series of wavelengths.

Abstract translation: 提供了一种振荡器系统，其从多模种子束和多模光功率源产生单模输出。 在振荡器系统中使用的种子源产生用于向多模光功率源注入种子的多模种子光束。 光功率源具有短腔，使得多模光功率源的纵向模式充分间隔开，使得光功率源的模式可以相对于多模种子束定位，使得种子束不与 光源的相邻纵向模式。 通过将单个纵向模式定位为与种子束重叠，其中种子束与光学功率源的相邻纵向模式不显着重叠，产生高能量单纵模输出。 光功率源应该具有足够短的光学腔长度，以使多模光功率源的纵向模式充分间隔开，使得多模种子光束不与光功率源的相邻纵向模式重叠。 振荡器系统优选地包括输出控制器回路，其用于使光功率源的纵向模式输出相对于种子束的中心居中。 振荡器系统还优选地包括使振荡器系统能够扫描一系列波长的调谐器控制器。

公开(公告)号：US20060250677A1

公开(公告)日：2006-11-09

申请号：US11332555

申请日：2006-01-12

Applicant: Hanna Hoffman ,  David Spence ,  Alan Petersen ,  James Kafka

Inventor： Hanna Hoffman ,  David Spence ,  Alan Petersen ,  James Kafka

IPC: G02F2/02

CPC classification number: G02F1/35 ,  G02F1/3534 ,  G02F1/3544

Abstract: 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.

Abstract translation: 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：US20050157381A1

公开(公告)日：2005-07-21

申请号：US10762216

申请日：2004-01-20

Applicant: James Kafka ,  Jianping Zhou ,  Kevin Holsinger

Inventor： James Kafka ,  Jianping Zhou ,  Kevin Holsinger

IPC: H01S3/00 ,  H01S3/16 ,  H01S3/23

CPC classification number: H01S3/235 ,  H01S3/0064 ,  H01S3/0085 ,  H01S3/107 ,  H01S3/1611 ,  H01S3/1618

Abstract: A regenerative amplifier system that is optimized for low-gain gain media is provided. The system is configured to include a minimum number of intra-cavity elements while still eliminating the leakage of the seed pulses from the output beam. In addition, the contrast ratio of the amplified pulses is increased even considering the long build-up time that is required in low-gain regenerative amplifiers. This is accomplished using a single Pockels cell between the oscillator and amplifier to select a single seed pulse for the cavity, instead of using a Faraday isolator. This directs the unwanted seed pulses in a separate direction from the output pulse. When the amplified pulse exits the cavity, it is directed in a direction away from the oscillator by the same Pockels cell. Only one additional Pockels cell and one polarizer are required inside the regenerative amplifier cavity.

Abstract translation: 提供了针对低增益增益介质进行了优化的再生放大器系统。 该系统被配置为包括最小数量的腔内元件，同时仍然消除种子脉冲从输出光束的泄漏。 此外，即使考虑到低增益再生放大器所需的长的积聚时间，放大脉冲的对比度也增加。 这是使用振荡器和放大器之间的单个Pockels单元来实现的，以便为腔体选择单个种子脉冲，而不是使用法拉第隔离器。 这将不需要的种子脉冲与输出脉冲分开的方向。 当放大的脉冲离开空腔时，它通过相同的Pockels单元被导向远离振荡器的方向。 再生放大器腔内只需要一个额外的Pockels单元和一个偏振器。

公开(公告)号：US5577058A

公开(公告)日：1996-11-19

申请号：US305032

申请日：1994-09-13

Applicant: James Kafka ,  Vincent J. Newell ,  Michael Watts

Inventor： James Kafka ,  Vincent J. Newell ,  Michael Watts

IPC: G02F1/39 ,  H01S3/10 ,  H01S3/23

CPC classification number: G02F1/39 ,  H01S3/10092 ,  H01S3/2316

Abstract: An oscillator system which produces a single mode output from a multimode seed beam and a multimode optical power source. The seed source employed in the oscillator system produces a multimode seed beam that is used to injection seed a multimode optical power source. The optical power source has a short cavity such that the longitudinal modes of the multimode optical power source are sufficiently spaced apart that a mode of the optical power source can be positioned relative to the multimode seed beam such that the seed beam does not significantly overlap with neighboring longitudinal modes of the optical power source. By positioning a single longitudinal mode to overlap with the seed beam where the seed beam does not significantly overlap with neighboring longitudinal modes of the optical power source, a high energy single longitudinal mode output is produced. The multimode seed beam preferably has a bandwidth, defined as the full width half maximum of the spectral output, of between about 0.025 cm.sup.-1 and 2.5 cm.sup.-1. The seed beam most preferably has a bandwidth of about 0.2 cm.sup.-1. The optical power source should have an optical cavity length that is sufficiently short to cause the longitudinal modes of the multimode optical power source to be sufficiently spaced apart so that the multimode seed beam does not overlap with neighboring longitudinal modes of the optical power source. Since the spacing of the longitudinal modes equals c/2 L where c is the speed of light and L is the optical length of the cavity, the optical power source preferably has an optical cavity length less than or equal to about c/2 bw where c is the speed of light and bw is the bandwidth of the multimode seed beam. It is preferred that the optical power source have a cavity length of between about 0.2 cm and 20 cm.

Abstract translation: 一种振荡器系统，其从多模种子束和多模光功率源产生单模输出。 在振荡器系统中使用的种子源产生用于向多模光功率源注入种子的多模种子光束。 光功率源具有短腔，使得多模光功率源的纵向模式充分间隔开，使得光功率源的模式可以相对于多模种子束定位，使得种子束不与 光源的相邻纵向模式。 通过将单个纵向模式定位为与种子束重叠，其中种子束与光学功率源的相邻纵向模式不显着重叠，产生高能量单纵模输出。 多模种子束优选地具有定义为光谱输出的全宽半最大值的带宽在约0.025cm -1至2.5cm -1之间。 种子束最优选具有约0.2cm -1的带宽。 光功率源应该具有足够短的光学腔长度，以使多模光功率源的纵向模式充分间隔开，使得多模种子光束不与光功率源的相邻纵向模式重叠。 由于纵向模式的间距等于c / 2 L，其中c是光速，L是空腔的光学长度，所以光学功率源优选具有小于或等于约c / 2 bw的光腔长度，其中 c是光速，bw是多模种子束的带宽。 优选的是，光功率源具有在大约0.2cm到20cm之间的空腔长度。

公开(公告)号：US20070237191A1

公开(公告)日：2007-10-11

申请号：US11700366

申请日：2007-01-30

Applicant: James Kafka ,  James Clark ,  David Spence

Inventor： James Kafka ,  James Clark ,  David Spence

IPC: H01S3/10

CPC classification number: H01S3/2308 ,  G02F2001/392

Abstract: The present application is directed to various embodiments of laser systems which include a laser oscillator and a pump source configured to produce coherent light at high repetition rates and with short pulse durations, wherein the output from the laser oscillator is then amplified in a laser amplifier, which includes a pump source, the output from the laser amplifier has increased average and peak power, but preserves the short pulse duration and high repetition rate of the laser oscillator.

Abstract translation: 本申请涉及激光系统的各种实施例，其包括激光振荡器和被配置为以高重复率和短脉冲持续时间产生相干光的泵浦源，其中激光振荡器的输出然后在激光放大器中被放大， 其包括泵浦源，激光放大器的输出具有增加的平均和峰值功率，但保持激光振荡器的短脉冲持续时间和高重复率。