公开(公告)号：US5943353A

公开(公告)日：1999-08-24

申请号：US880785

申请日：1997-06-23

申请人： Kenji Kaneko

发明人： Kenji Kaneko

IPC分类号： G02F1/37 ,  H01S3/042 ,  H01S3/08 ,  H01S3/109 ,  H01S3/137 ,  H01S3/16 ,  H01S3/04

CPC分类号： H01S3/137 ,  H01S3/109

摘要： A laser light source apparatus and a control method for automatically sitting the temperature of a KTP crystal to an optimal temperature, and to follow up in variations of the optimal temperature. A predetermined temperature step is periodically added to a temperature corresponding to a reference potential, the addition of the temperature step is stopped when a temperature at which the UV laser output is substantially maximized, and a temperature step smaller than the temperature step .DELTA.T is successively subtracted from the temperature Tc, thereby automatically setting the KTP crystal temperature to the optimal temperature. Also, the difference between the two values of the UV laser output before and after each step addition of the temperature step is calculated and step subtraction is started when the difference becomes reversed in polarity, thus controlling the KTP crystal temperature so that the UV laser output is always maintained at the maximum. Therefore, the control system can follow up a variation in the optimal temperature due to a change in temperature characteristic of the KTP crystal.

摘要翻译： 一种用于将KTP晶体的温度自动调节到最佳温度的激光源装置和控制方法，并且在最佳温度的变化中进行跟踪。 在与基准电位相对应的温度下周期性地添加规定的温度阶段，当UV激光输出的温度基本上达到最大时，停止温度步骤的添加，并且比温度步长DELTA T小的温度步骤相继 从温度Tc中减去，从而自动将KTP晶体温度设定为最佳温度。 另外，计算出在每一步添加温度阶段之前和之后的UV激光输出的两个值之间的差异，当差异在极性反转时开始步进减法，从而控制KTP晶体温度，使得UV激光输出 始终保持在最大限度。 因此，由于KTP晶体的温度特性的变化，控制系统可以跟随最佳温度的变化。

公开(公告)号：US5907570A

公开(公告)日：1999-05-25

申请号：US955768

申请日：1997-10-22

申请人： William L. Nighan ,  Mark S. Keirstead ,  Emily Cheng

发明人： William L. Nighan ,  Mark S. Keirstead ,  Emily Cheng

IPC分类号： H01S3/08 ,  H01S3/042 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/16

CPC分类号： H01S3/09415 ,  H01S3/042 ,  H01S3/08045 ,  H01S3/0805 ,  H01S3/08072 ,  H01S3/1611 ,  H01S3/1673

摘要： A diode pumped laser includes a resonator mirror and an output coupler, defining a laser resonator with a resonator optical axis. A strong thermal lens gain medium with a TEM.sub.00 mode diameter is mounted in the resonator along the resonator optical axis. The dopant level of the gain medium is in the range of 0.01 to less than 0.5 percent. A diode pump source supplies a pump beam to the gain medium in the laser resonator, and produces an output beam with a diameter larger than the TEM.sub.00 mode diameter to reduce thermal birefringence. A power source supplies power to the diode pump source. A polarizing element can be positioned in the resonator, along with a aperture stop The laser operates well over a large range of pump powers. Its slope efficiency in the TEM.sub.00 mode is greater than 40%, with an overall efficiency greater than 25%. One of the gain mediums used is Nd:YVO.sub.4. This material exhibits high gain and a short upper state lifetime. These properties make it attractive in designing a Q-switched laser, or one that is insensitive to optical feedback. Another material is Nd:YAG. The technique of optimizing the pump beam spot size is found to minimize loss due to thermal birefringence.

摘要翻译： 二极管泵浦激光器包括谐振器镜和输出耦合器，其限定具有谐振器光轴的激光谐振器。 谐振器中沿着谐振器光轴安装了具有TEM00模式直径的强热透镜增益介质。 增益介质的掺杂剂水平在0.01至小于0.5％的范围内。 二极管泵浦源将激光束提供给激光谐振器中的增益介质，并产生直径大于TEM00模式直径的输出光束，以减少热双折射。 电源为二极管泵浦源供电。 偏振元件可以与孔径光阑一起定位在谐振器中。激光器在大范围的泵浦功率下运行良好。 其TEM00模式的斜率效率大于40％，总效率大于25％。 使用的增益介质之一是Nd：YVO4。 该材料具有较高的增益和较短的上限寿命。 这些性质使得在设计Q开关激光器或对光学反馈不敏感的激光器方面具有吸引力。 另一种材料是Nd：YAG。 发现优化泵浦光斑尺寸的技术可以使由于热双折射引起的损耗最小化。

公开(公告)号：US5889808A

公开(公告)日：1999-03-30

申请号：US825048

申请日：1997-03-27

申请人： Tetsuo Kojima ,  Koji Yasui

发明人： Tetsuo Kojima ,  Koji Yasui

IPC分类号： H01S3/042 ,  H01S3/04 ,  H01S3/094 ,  H01S3/0941

CPC分类号： H01S3/0941 ,  H01S3/0407 ,  H01S3/042 ,  H01S3/094057

摘要： To inexpensively and in a simple configuration provide a solid laser amplifier and a solid laser unit capable of generating a high output and high quality laser beam, the unit includes a solid laser medium 5A containing active solid media; a flow tube 14 or the like allowing a cooling medium 24 for cooling the solid laser medium 5A; and a laser array 12 so controlled in temperature as to emit an excitation light 9 for exciting the solid laser medium 5A, the wavelength of which lies within the absorption spectra of a solid laser medium 5A yet does not coincide with that of the absorption spectrum peak of a solid laser medium 5A.

摘要翻译： 为了廉价并且以简单的配置提供了能够产生高输出和高质量激光束的固体激光放大器和固体激光器单元，该单元包括含有活性固体介质的固体激光介质5A; 流动管14等，用于冷却固体激光介质5A的冷却介质24; 以及如此控制的激光阵列12，以发射用于激发固体激光介质5A的激发光9，其激光位于固体激光介质5A的吸收光谱内，但与吸收光谱峰的波长不一致 的固体激光介质5A。

公开(公告)号：US5854802A

公开(公告)日：1998-12-29

申请号：US868044

申请日：1997-06-03

申请人： Tianfeng Jin ,  Reinhard F. Bruch

发明人： Tianfeng Jin ,  Reinhard F. Bruch

IPC分类号： H01S3/042 ,  H01S3/06 ,  H01S3/08 ,  H01S3/082 ,  H01S3/0941 ,  H01S3/102 ,  H01S3/109 ,  H01S3/10

CPC分类号： H01S3/109 ,  H01S3/042 ,  H01S3/0602 ,  H01S3/0627 ,  H01S3/08031 ,  H01S3/082 ,  H01S3/09415 ,  H01S3/1028

摘要： A single longitudinal mode frequency-converted solid-state laser includes an optical pumping source that produces optical pumping radiation, a coupled resonant cavity having a first resonant cavity and a second resonant cavity sharing a common partially reflecting mirror, a solid-state laser medium disposed within the first resonant cavity and pumped by the optical pumping radiation, and an optical wavelength converting means within said second resonant cavity. The laser medium generates a first laser radiation at a first wavelength which is converted by the wavelength converting means into a second laser radiation at a second wavelength. A temperature controlling means controls the temperatures of the first and the second resonant cavities and of the optical pumping source. The optical path lengths of the first resonant cavity and the second resonant cavity are selected such that only one longitudinal mode of the coupled resonant cavity is within the gain bandwidth of the laser medium. Thus, the single longitudinal mode can oscillate in said coupled resonant cavity. The laser has fewer intracavity elements and thus fewer internal optical losses and a higher efficiency.

摘要翻译： 单个纵向模式频率转换的固态激光器包括产生光泵浦辐射的光泵浦源，耦合谐振腔，其具有第一谐振腔和共享公共部分反射镜的第二谐振腔，设置的固态激光介质 在第一谐振腔内并由光泵浦辐射泵浦，以及在所述第二谐振腔内的光波长转换装置。 激光介质产生第一波长的第一激光辐射，该第一激光辐射由波长转换装置转换成第二波长的第二激光辐射。 温度控制装置控制第一和第二谐振腔和光泵浦源的温度。 选择第一谐振腔和第二谐振腔的光路长度，使得耦合谐振腔的仅一个纵向模式在激光介质的增益带宽内。 因此，单个纵向模式可以在所述耦合谐振腔中振荡。 激光器具有更少的腔内元件，因此更少的内部光学损耗和更高的效率。

公开(公告)号：US5778020A

公开(公告)日：1998-07-07

申请号：US739805

申请日：1996-10-30

申请人： M. Cem Gokay

发明人： M. Cem Gokay

IPC分类号： H01S3/02 ,  H01S3/04 ,  H01S3/042 ,  H01S3/06 ,  H01S3/0941 ,  H01S3/091

CPC分类号： H01S3/0941 ,  H01S3/025 ,  H01S3/0407 ,  H01S3/042 ,  H01S3/061

摘要： A transverse pumping system for a laser rod uses symmetrically arranged banks of laser diodes which create overlapping patterns of illumination inside the rod. Cooling is provided by a symmetrically constructed circulation system which directs a turbulent flow of cooling water against the laser rod and against a heat sink for the diode banks. Cooling water for the laser rod flows through a glass tube surrounding the rod. This enables the cooling water to perform an auxiliary function in focussing the illumination generated by the pumping diodes.

摘要翻译： 用于激光棒的横向泵送系统使用对称布置的激光二极管组，其在棒内产生重叠的照明图案。 通过对称构造的循环系统提供冷却，该循环系统将冷却水的湍流引导到激光棒上，并对着二极管组的散热片。 激光棒的冷却水流过围绕杆的玻璃管。 这使得冷却水能够在聚焦由泵浦二极管产生的照明的情况下执行辅助功能。

公开(公告)号：US5761233A

公开(公告)日：1998-06-02

申请号：US630395

申请日：1996-04-10

申请人： Hans Bruesselbach ,  David S. Sumida

发明人： Hans Bruesselbach ,  David S. Sumida

IPC分类号： H01S3/094 ,  H01S3/042 ,  H01S3/06 ,  H01S3/0941 ,  H01S3/16 ,  H01S3/93

CPC分类号： H01S3/0941 ,  H01S3/0405 ,  H01S3/042 ,  H01S3/0602 ,  H01S3/0606 ,  H01S3/061 ,  H01S3/0612 ,  H01S3/094084 ,  H01S3/1618 ,  H01S3/1643

摘要： A high-Q pump cavity is formed from undoped crystal pieces that are diffusion bonded to a doped core of the same crystal host material. The resulting monolithic pump cavity has 2 opposing convex-curved sides which have a highly-reflective coating on their outer surfaces, except in narrow slit-shaped areas on each curved side through which laser-diode-supplied pump light enters the cavity. The curvature of the two curved sides is such that nearly all the pump light rays that pass through the slit-shaped areas are focussed by the curvature onto the doped core, and rays that enter the cavity are redirected through the doped core many times, resulting in efficient, uniform absorption. The cavity has two opposing flat sides that interface with metal heat sink blocks to facilitate the removal of internally-generated heat. Thermally induced astigmatic lensing caused by this heat is countered by cavity design in which the core shape and the dimensions of the cavity minimize this astigmatism. Embedding a doped crystal core within a crystal of the same material allows the lasing mode size to be larger than the core, allowing the entire doped core to be accessible for efficient extraction, helps reduce parasitic oscillation, and provides highly effective cooling. Furthermore, laser diode light couples directly into the doped core, with close to 100% transport efficiency.

摘要翻译： 高Q泵浦腔由扩散接合到相同晶体主体材料的掺杂核心的未掺杂晶体片形成。 所得到的整体泵腔具有两个相对的凸曲面，在其外表面上具有高反射涂层，除了在激光二极管供应的泵浦光进入空腔的每个弯曲侧上的狭窄狭缝形区域之外。 两个弯曲面的曲率使得通过狭缝状区域的几乎所有的泵浦光线被曲率聚焦到掺杂的芯上，并且进入空腔的射线被重新导向通过掺杂核心多次，导致 在高效，均匀的吸收。 空腔具有与金属散热块相接合的两个相对的平坦侧面，以便于去除内部产生的热量。 由这种热导致的热诱导的散光透镜由空腔设计抵消，其中芯的形状和腔的尺寸使得这种散光最小化。 将掺杂的晶体核嵌入相同材料的晶体内可以使激光模式尺寸大于芯，使整个掺杂芯可以方便地进行高效提取，有助于减少寄生振荡，并提供高效冷却。 此外，激光二极管灯直接耦合到掺杂的芯中，具有接近100％的传输效率。

公开(公告)号：US5761227A

公开(公告)日：1998-06-02

申请号：US760702

申请日：1996-12-05

申请人： David E. Hargis ,  Sven E. Nelte

发明人： David E. Hargis ,  Sven E. Nelte

IPC分类号： H01S3/04 ,  H01S3/042 ,  H01S3/06 ,  H01S3/081 ,  H01S3/082 ,  H01S3/0941 ,  H01S3/109 ,  H01S3/16 ,  H01S3/10

CPC分类号： H01S3/042 ,  H01S3/0627 ,  H01S3/082 ,  H01S3/109 ,  G02F2001/3503 ,  H01S2302/00 ,  H01S2303/00 ,  H01S3/0405 ,  H01S3/0602 ,  H01S3/0612 ,  H01S3/0815 ,  H01S3/0816 ,  H01S3/09415 ,  H01S3/1611 ,  H01S3/1671 ,  H01S3/1673

摘要： An intracavity frequency-converted laser having an intracavity reflector situated to reflect converted radiation at a nonzero angle with respect to the optical axis. The laser includes an optical cavity that defines an optical axis, a gain medium for providing a fundamental laser emission, a pump source for pumping the gain medium, and a nonlinear material for frequency converting the fundamental laser emission to provide first and second converted beams that propagate in opposite directions within the optical cavity. An angled reflector that reflects optical radiation at the converted wavelength, but is transmissive at the fundamental wavelength is situated within the optical cavity to reflect one of the converted beams along a path angled with respect to the optical axis. Advantageously, reflecting the converted radiation before it propagates through the gain medium avoids absorption losses. Furthermore, interference between the reflected beam and other converted beam is avoided due to the angle of reflection. In one embodiment, the gain medium comprises an Nd.sup.3+ doped material, the laser is designed to lase on the .sup.4 F.sub.3/2 .fwdarw..sup.4 I.sub.9/2 transition at about 870-960 nm, and a nonlinear crystal is situated to frequency-double the emission of the gain medium to produce blue light at about 435-480 nm.

摘要翻译： 一种腔内频率转换激光器，其具有位于相对于光轴以非零角度反射转换的辐射的腔内反射器。 激光器包括限定光轴的光腔，用于提供基本激光发射的增益介质，用于泵浦增益介质的泵浦源，以及用于频率转换基本激光发射的非线性材料，以提供第一和第二转换束， 在光学腔内沿相反方向传播。 反射在转换波长的光辐射但在基波长处透射的成角度的反射器位于光学腔内，以沿着相对于光轴成角度的路径反射一个转换光束。 有利地，在转换的辐射传播通过增益介质之前反射转换的辐射避免了吸收损失。 此外，由于反射角度，避免了反射光束和其它转换光束之间的干涉。 在一个实施例中，增益介质包括Nd 3+掺杂材料，激光器被设计成在大约870-960nm处的4F 3/2> 4I 9/2跃迁上发光，并且非线性晶体位于 该增益介质在约435-480nm处产生蓝光。

公开(公告)号：US5751750A

公开(公告)日：1998-05-12

申请号：US798513

申请日：1997-02-10

申请人： Dirk Friede ,  Hermann Hage ,  Karl-Heinz Herzner ,  Volker Scholz

发明人： Dirk Friede ,  Hermann Hage ,  Karl-Heinz Herzner ,  Volker Scholz

IPC分类号： H01S3/042 ,  H01S3/04 ,  H01S3/05 ,  H01S3/08 ,  H01S3/139 ,  G02B5/08

CPC分类号： H01S3/08081 ,  H01S3/08059 ,  H01S3/0401 ,  H01S3/139

摘要： A laser system with compensated optics contains at least one optical element which is thermally coupled to a heat source in order to thermally compensate for a deformation of optical elements disposed in a beam path of the laser system. The deformation is brought about by the laser beam.

摘要翻译： 具有补偿光学的激光系统包括至少一个光学元件，其与热源热耦合以便热补偿设置在激光系统的光束路径中的光学元件的变形。 变形是由激光束引起的。

公开(公告)号：US5748664A

公开(公告)日：1998-05-05

申请号：US737277

申请日：1996-11-06

申请人： Malcolm Harry Dunn ,  Wilson Sibbett ,  Peter Rahlff Christian ,  Bruce David Sinclair ,  Michael Andrew Firth

发明人： Malcolm Harry Dunn ,  Wilson Sibbett ,  Peter Rahlff Christian ,  Bruce David Sinclair ,  Michael Andrew Firth

IPC分类号： H01S3/04 ,  H01S3/042 ,  H01S3/06 ,  H01S3/08 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/091

CPC分类号： H01S3/042 ,  H01S3/0606 ,  H01S3/09415 ,  H01S3/0405 ,  H01S3/08072 ,  H01S3/08095 ,  H01S3/09408

摘要： An all-solid-state laser comprising a slab (1) of gain medium, a diode laser pump system (3) configured in an end pumping geometry with the gain medium (1) and a heat sink thermally contacted to the gain medium (1) wherein the diode laser pump system (3) and the gain medium (1) are cooperably arranged so that in use a positive thermal lens is capable of being formed within the medium, the gain medium (1) having a thickness (d-d') made as small as possible while permitting the substantially unhindered passage through the slab of the laser mode established between the two mirrors (M1, M2).

摘要翻译： PCT No.PCT / GB95 / 00916 Sec。 371日期：1996年11月6日 102（e）日期1996年11月6日PCT提交1995年4月24日PCT公布。 第WO95 / 31022号公报 日期1995年11月16日包括增益介质板（1）的全固体激光器，配置有增益介质（1）的端部泵浦几何形状的二极管激光泵系统（3）和与所述增益介质热接触的散热器 增益介质（1），其中所述二极管激光泵系统（3）和所述增益介质（1）被协调地布置，使得在使用中能够在所述介质内形成正热透镜，所述增益介质（1）具有 厚度（d-d'）尽可能小，同时允许基本上不受阻碍地通过在两个反射镜（M1，M2）之间建立的激光模式的平板。

公开(公告)号：US5659563A

公开(公告)日：1997-08-19

申请号：US331359

申请日：1994-10-27

申请人： Edward D. Reed ,  David Trost

发明人： Edward D. Reed ,  David Trost

IPC分类号： G02B6/42 ,  H01S3/04 ,  H01S3/042 ,  H01S3/0915 ,  H01S3/092 ,  H01S3/23 ,  H01S3/08

CPC分类号： G02B6/4296 ,  H01S3/042 ,  H01S3/092 ,  H01S3/2383 ,  H01S3/005 ,  H01S3/025 ,  H01S3/0407 ,  H01S3/0931 ,  H01S3/10046 ,  H01S3/10053 ,  H01S3/1022 ,  Y10S165/303 ,  Y10S165/314

摘要： A pulsed solid state laser system is disclosed which utilizes a plurality of individual laser rods which are sequentially pumped and whose beans are combined into a single interleaved output bean. The individual laser rods are pumped at an average power level which is below that for maximum output power from each rod, thereby obviating the need for refrigeration cooling. A compact optical system is disclosed which permits a constant beam size even at different pump levels and other advantages. A compact cooling system is also disclosed.

摘要翻译： 公开了一种脉冲固态激光系统，其利用了顺序泵浦的多个单独的激光棒，并将其组合成单个交错输出豆。 单个激光棒的平均功率水平被泵浦，该功率水平低于来自每个杆的最大输出功率的激光棒，从而避免了对制冷冷却的需要。 公开了一种紧凑的光学系统，即使在不同的泵水平和其他优点下也允许恒定的光束尺寸。 还公开了紧凑的冷却系统。