公开(公告)号：US4961201A

公开(公告)日：1990-10-02

申请号：US399029

申请日：1989-08-24

Applicant: Hans Opower

Inventor： Hans Opower

IPC: H01S3/03 ,  H01S3/06 ,  H01S3/08 ,  H01S3/0975

CPC classification number: H01S3/06 ,  H01S3/0315 ,  H01S3/08081 ,  H01S3/0975

Abstract: In order to improve a waveguide configuration for high-frequency-excited, diffusion-cooled gas laser system comprising a waveguide carrier with a cavity closed like a ring in an azimuthal direction in relation to a longitudinal axis and extending in the direction of said longitudinal axis, and a waveguide for guidance of a laser beam along an optical axis, the waveguide being arranged in the cavity and formed by waveguide wall surfaces disposed at a constant spacing from one another, the width of the waveguide wall surfaces transversely to the lengthwise extent of the waveguide in the direction of the optical axis being a multiple of their spacing from one another, and the waveguide wall surfaces enclosing a discharge space between them, such that with a waveguide geometry which is as expedient as possible, i.e., not too large a width, it is still easy to handle and can be operated in a single mode, it is proposed that the waveguide be arranged in the cavity such that its lengthwise extent includes an angle of.ltoreq.30 degrees with the azimuthal direction.

Abstract translation: 为了改善用于高频激发的扩散冷却气体激光系统的波导配置，该系统包括波导载体，该波导载体相对于纵向轴线在方位角方向上闭合为环状，并且在纵轴方向上延伸 以及用于沿着光轴引导激光束的波导，所述波导被布置在所述空腔中并且由彼此以恒定间隔布置的波导壁面形成，所述波导壁表面的宽度横向于纵向方向 波导在光轴方向上是它们彼此间隔的倍数，并且波导壁表面在它们之间包围放电空间，使得具有尽可能方便的波导几何形状，即不太大的 宽度，它仍然易于处理并且可以在单一模式下操作，因此建议将波导布置在空腔中，使得其纵向ex 帐篷包括与方位角方向<30度的角度。

公开(公告)号：US4939738A

公开(公告)日：1990-07-03

申请号：US403074

申请日：1989-08-30

Applicant: Hans Opower

Inventor： Hans Opower

IPC: H01S3/08 ,  H01S3/03 ,  H01S3/038 ,  H01S3/06

CPC classification number: H01S3/0315 ,  H01S3/0385 ,  H01S3/041 ,  H01S3/08081 ,  H01S3/08095

Abstract: In order to improve an electrically excited, diffusion-cooled highpower laser comprising two wall surfaces slightly spaced from one another and forming an optical waveguide, the width of the wall surfaces being a multiple of the space between them and the surfaces enclosing between them a flow-free discharge chamber, and also comprising an optical resonator having resonator mirrors disposed at both ends of said waveguide, such that his results in a laser beam which can be well focused, it is suggested that the resonator be an optically unstable resonator including a beam path extending lengthwise of a resonator axis and having an expansion transverse to the resonator axis extending as far as at least one exiting laser beam and that the transverse expansion extend transversely to a longitudinal direction of the waveguide and approximately parallel to the wall surfaces.

Abstract translation: 为了改进电激励的扩散冷却的大功率激光器，其包括彼此稍微间隔开并形成光波导的两个壁表面，壁表面的宽度是它们之间的空间的倍数和包围它们之间的表面的流动 并且还包括具有设置在所述波导的两端的谐振器反射镜的光学谐振器，使得其结果是能够良好聚焦的激光束，建议该谐振器是包括光束的光学不稳定的谐振器 并且具有横向于至少延伸至少一个离开的激光束的共振器轴线的横向扩展，并且横向膨胀横向于波导的纵向方向并且大致平行于壁表面延伸。

公开(公告)号：US4580270A

公开(公告)日：1986-04-01

申请号：US512172

申请日：1983-07-08

Applicant: William M. Johnson ,  Marc S. Weinberg ,  Raymond Carroll

Inventor： William M. Johnson ,  Marc S. Weinberg ,  Raymond Carroll

IPC: H01S3/08

CPC classification number: H01S3/08081

Abstract: A high-energy laser system having gyroscopically stabilized optical elements includes an unstable confocal laser resonator having first and second spinning cavity feedback mirrors that resist mechanical wave energy induced spatial dislocations by gyroscopic inertia. One or both of the spinning cavity mirrors are preferably mounted for rotation with the rotor of a gyroscope. The gyroscope is operative as an actuator for selectively tilting the spinning mirror, and as a direction indicator for controlling the pointing direction of other elements with respect to inertial space. The angular rotation of the cavity feedback mirrors generates aerodynamic flows that cool the spinning mirrors by convective heat transport. Every material particle thereof describes an annular path once per revolution that prevents hot-spot formation and extends the useful lifetime.

Abstract translation: 具有陀螺稳定的光学元件的高能激光系统包括具有第一和第二纺丝腔反馈反射镜的不稳定的共焦激光谐振器，该反射镜通过陀螺惯性抵抗机械波能引起的空间位错。 纺丝腔镜中的一个或两个优选安装成与陀螺仪的转子一起旋转。 陀螺仪作为用于选择性地倾斜旋转镜的致动器，以及作为用于控制其它元件相对于惯性空间的指向方向的方向指示器。 腔反馈反射镜的角度旋转产生通过对流热传递来冷却旋转镜的空气动力学流。 其每个材料颗粒每转一次描述环形路径，防止热点形成并延长使用寿命。

公开(公告)号：US4559627A

公开(公告)日：1985-12-17

申请号：US621676

申请日：1984-06-18

Applicant: Myung K. Chun

Inventor： Myung K. Chun

IPC: H01S3/091 ,  H01S3/06 ,  H01S3/08 ,  H01S3/0915 ,  H01S3/115

CPC classification number: H01S3/0606 ,  H01S3/08081 ,  H01S2301/20 ,  H01S3/0805 ,  H01S3/08072 ,  H01S3/08095 ,  H01S3/115

Abstract: The invention deals with a face pumped slab laser in which the slab is of a rectangular configuration, favoring use of an optical resonator cavity capable of producing a rectangular beam of good quality within the cavity. The novel optical resonator cavity, which produces this rectangular beam, is stable on one axis corresponding to the smaller beam dimension and unstable on an axis orthogonal to the first axis corresponding to the larger beam dimension. The result is both high efficiency, excellent power and a good quality output beam is produced.

Abstract translation: 本发明涉及一种面板泵送平板激光器，其中板坯是矩形构造，有利于使用能够在空腔内产生质量良好的矩形梁的光学​​谐振腔。 产生该矩形光束的新型光学谐振腔在对应于较小光束尺寸的一个轴上是稳定的，并且在与第一轴正交的轴上不对称，该光轴对应于较大的光束尺寸。 结果是高效率，优异的功率和良好的质量输出光束产生。

公开(公告)号：US4310808A

公开(公告)日：1982-01-12

申请号：US77308

申请日：1979-09-20

Applicant: Robert L. Byer ,  Richard L. Herbst

Inventor： Robert L. Byer ,  Richard L. Herbst

IPC: H01S3/08 ,  H01S3/098 ,  H01S3/11 ,  H01S3/115 ,  H01S3/081

CPC classification number: H01S3/08036 ,  H01S3/08081 ,  H01S3/0931 ,  H01S3/115

Abstract: The high power laser includes a high gain medium (>80%) such as a lightly doped Nd:YAG rod contained within an unstable optical resonator of the type wherein power flows outward from the optical axis of the resonator. The output beam is coupled out of the resonator by means of a coupling device having a high coupling factor (>55% of the circulating power inside the optical resonator) and in a preferred embodiment the coupling factor is as high as 80-90%. The optical resonator is preferably a confocal resonator employing one concave mirror and one convex mirror. The convex mirror forms the output coupling device for providing a high degree of diffraction output coupling around the periphery of the output mirror. The output beam is collimated in the region of the output mirror. The curvatures of the two mirrors forming the optical resonator are dimensioned to take into account the positive focusing lens effect of the high gain medium produced by a transverse thermal gradient in the high gain medium encountered in use when pumped by flash lamps. The laser is Q-switched by means of a linear polarizer and a pulsed KD*P quarter wave plate. The output beam has 25 megawatts of peak power with a pulse width of 10 nanoseconds, a pulse repetition rate of 10 pulses per second. The output beam has a power density of 75 megawatts per square centimeter.

Abstract translation: 大功率激光器包括高增益介质（> 80％），例如包含在其中功率从谐振器的光轴向外流动的类型的不稳定光谐振器内的轻掺杂Nd：YAG棒。 输出光束通过具有高耦合因子（光谐振器内的循环功率的大于55％）的耦合装置耦合到谐振器外，并且在优选实施例中，耦合因子高达80-90％。 光谐振器优选为采用一个凹面镜和一个凸面镜的共焦共振器。 凸镜形成输出耦合装置，用于提供耦合在输出反射镜周边的高度的衍射输出。 输出光束在输出镜的区域被准直。 形成光学谐振器的两个反射镜的曲率被设计成考虑到当由闪光灯泵浦时在使用中遇到的高增益介质中由横向热梯度产生的高增益介质的正聚焦透镜效应。 激光器通过线性偏振器和脉冲KD * P四分之一波片进行Q开关。 输出光束具有25兆瓦的峰值功率，脉冲宽度为10纳秒，脉冲重复频率为每秒10个脉冲。 输出光束的功率密度为75兆瓦每平方厘米。

公开(公告)号：US3975694A

公开(公告)日：1976-08-17

申请号：US443888

申请日：1974-02-19

Applicant: Nathan T. Melamed ,  Kenneth B. Steinbruegge

Inventor： Nathan T. Melamed ,  Kenneth B. Steinbruegge

IPC: H01S3/11 ,  H01S3/17 ,  H01S3/10 ,  H01S3/08

CPC classification number: H01S3/17 ,  H01S3/11 ,  H01S3/08081

Abstract: An improved self Q-switching Nd--UO.sub.2 -glass laser is provided in which a diffusing medium is included, either within the laser rod or externally thereof to increase the effective volume of the laser rod. Various diffusing means are disclosed including optical inhomogeneities, diffusion coatings, and curvilinear resonators.

Abstract translation: 提供了一种改进的自Q切换Nd-UO2玻璃激光器，其中包括激光棒内或其外部的扩散介质，以增加激光棒的有效体积。 公开了包括光学不均匀性，扩散涂层和曲线谐振器的各种扩散装置。

公开(公告)号：US3873942A

公开(公告)日：1975-03-25

申请号：US39011973

申请日：1973-08-20

Applicant: AVCO EVERETT RES LAB INC

Inventor： REILLY JAMES P

IPC: H01S3/08

CPC classification number: H01S3/08081

Abstract: Herein described is an unstable resonator cavity for a laser having a primary reflection surface at one end of the cavity that intercepts the optical axis of the cavity and a feedback reflection surface at the other end of the optical cavity that does not intercept the optical axis of the cavity such that obscuration of the output radiation from the cavity along the axis thereof is eliminated. The primary and feedback reflection surfaces are shaped to reflect radiation within the cavity which is initially substantially parallel to the cavity axis at the extreme lateral edges of the reflection surfaces so that radiation progressively moves from the extreme lateral edges toward the optical axis upon repeated reflections between these surfaces until this radiation clears the inside edge of the feedback reflector and escapes from the optical cavity as output radiation. Thus, all radiation escaping from the optical cavity which becomes output radiation is through a totally unobscured radiation opening centered on the optical axis. And so, a relatively high proportion of the output radiation when focused may be centered on an axis which coincides with the axis of the optical focusing system.

Abstract translation: 这里描述的是用于激光器的不稳定谐振腔，其具有在空腔的一端处拦截空腔的光轴的初级反射表面和在光腔的另一端处的反射面，该反射面不会截取光轴的光轴 该空腔使得沿着其轴线从腔体的输出辐射的遮蔽被消除。 初级和反馈反射表面被成形为反射空腔内的辐射，其最初基本上平行于反射表面的最外侧边缘处的空腔轴线平行，使得辐射在反射表面之间反复反射时从最外侧边缘向光轴逐渐移动 这些表面直到该辐射清除反馈反射器的内边缘并从光腔逸出为输出辐射。 因此，成为输出辐射的从光腔逸出的所有辐射通过以光轴为中心的完全未观察的辐射开口。 因此，当聚焦时输出辐射的相对高的比例可以在与光学聚焦系统的轴线重合的轴上居中。

公开(公告)号：US09966723B2

公开(公告)日：2018-05-08

申请号：US14947181

申请日：2015-11-20

Applicant: JGM Associates, Inc.

Inventor： Jeffrey G. Manni

IPC: H01S3/08 ,  H01S3/0941 ,  H01S3/06 ,  H01S3/115 ,  H01S3/117 ,  H01S5/40 ,  H01S3/094 ,  H01S3/11 ,  H01S3/16

CPC classification number: H01S3/08081 ,  H01S3/0602 ,  H01S3/0615 ,  H01S3/08072 ,  H01S3/09408 ,  H01S3/094084 ,  H01S3/0941 ,  H01S3/1103 ,  H01S3/1115 ,  H01S3/115 ,  H01S3/117 ,  H01S3/1603 ,  H01S5/4025

Abstract: A laser including a solid state laser gain medium having a D-shaped cross section and an unstable resonator laser cavity including the solid state laser gain medium configured with a geometric magnification in a range of 1 to 5 under the intended operating conditions, including the effects of thermal lensing in the gain medium. An optical switching device in the unstable resonator laser cavity generates a pulse duration in the range of 0.05 to 100 nanoseconds. A diode-pump source is configured to inject pump light through the curved or barrel surface of the D-shaped gain medium.

公开(公告)号：US09722392B2

公开(公告)日：2017-08-01

申请号：US15035765

申请日：2014-11-19

Applicant: Candela Corporation

Inventor： Jayant D. Bhawalkar ,  Xiaoming Shang ,  Jinze Qiu ,  Christopher J. Jones ,  James Hsia

IPC: H01S3/16 ,  H01S3/08 ,  H01S3/131 ,  H01S3/23 ,  H01S3/067 ,  H01S3/092 ,  H01S3/109 ,  H01S3/11 ,  H01S3/06 ,  H01S3/094 ,  H01S3/10 ,  H01S3/113 ,  H01S3/00

CPC classification number: H01S3/1633 ,  H01S3/0092 ,  H01S3/061 ,  H01S3/0617 ,  H01S3/0625 ,  H01S3/0627 ,  H01S3/06754 ,  H01S3/08081 ,  H01S3/092 ,  H01S3/094053 ,  H01S3/094061 ,  H01S3/094069 ,  H01S3/10023 ,  H01S3/109 ,  H01S3/1115 ,  H01S3/113 ,  H01S3/1312 ,  H01S3/1611 ,  H01S3/1643 ,  H01S3/2308 ,  H01S2301/02

Abstract: A MOPA laser system that includes a seed laser configured to output pulsed laser light, an amplifier configured to receive and amplify the pulsed laser light emitted by the seed laser; and a pump laser configured to deliver a pump laser beam to both the seed laser and the amplifier.

公开(公告)号：US09118164B1

公开(公告)日：2015-08-25

申请号：US14185000

申请日：2014-02-20

Applicant: U.S. Army Research Laboratory

Inventor： George Alex Newburgh

IPC: H01S3/30 ,  H01S3/067 ,  H01S3/16 ,  H01S3/091 ,  H01S3/06

CPC classification number: H01S3/0632 ,  H01S3/0625 ,  H01S3/0627 ,  H01S3/0672 ,  H01S3/08081 ,  H01S3/09403 ,  H01S3/09408 ,  H01S3/0941 ,  H01S3/09415 ,  H01S3/161 ,  H01S3/1616 ,  H01S3/1618 ,  H01S3/1643

Abstract: A composite laser gain medium is comprised of a first rare-earth element doped core; and a second rare-earth element doped cladding, at least partially, adjacent to the core. A portion of the lasing by the cladding at one wavelength within the composite laser gain medium is absorbed by the core so as to cause lasing of the core at a different wavelength. At least two distinct rare earth element pairs may be used in embodiments: (1) thulium (Tm) as a cladding rare-earth dopant and holmium (Ho) as the core rare-earth dopant; and (2) ytterbium (Yb) as a cladding rare-earth dopant and erbium (Er) as the core rare-earth dopant. Other rare earth element pairs are also believed possible. The laser composite gain medium may be configured to have a slab, or a cylindrical geometry.

Abstract translation: 复合激光增益介质由第一稀土元素掺杂芯组成; 以及至少部分地与所述芯相邻的第二稀土元素掺杂包层。 由复合激光增益介质中的一个波长处的包层的激光的一部分被芯吸收，以引起芯在不同波长的激光。 在实施例中可以使用至少两个不同的稀土元素对：（1）作为包覆稀土掺杂剂的ium（Tm）和作为核稀土掺杂剂的钬（Ho）; 和（2）作为包覆稀土掺杂剂的镱（Yb）和作为核稀土掺杂剂的铒（Er）。 其他稀土元素对也被认为是可能的。 激光复合增益介质可以被配置为具有板坯或圆柱形几何形状。