公开(公告)号：US20020085607A1

公开(公告)日：2002-07-04

申请号：US10013348

申请日：2001-12-13

Inventor： Jean-Eucher Montagne

IPC: H01S003/14

CPC classification number: H01S3/0606 ,  H01S3/0612 ,  H01S3/0941

Abstract: According to this method, in order to fabricate active elements which comprise at least one doped part comprising a doping capable of absorbing a pump beam and at least one undoped part, and which have opposed faces of the same geometrical shape, a process of preparing an elongate active rod (5), which has a cross section identical to said geometrical shape, said process comprising at least one step of cutting and one step of joining at least one doped block (6) and at least one undoped block (7, 8), and a process of forming a plurality of active elements from the active rod (5), said formation process comprising at least one step of transverse cutting along the active rod (5) and the step of collectively treating surfaces of the active elements, are carried out in succession.

Abstract translation: 根据该方法，为了制造包括至少一个掺杂部分的有源元件，该掺杂部分包括能够吸收泵浦光束和至少一个未掺杂部分的掺杂，并且具有相同几何形状的相对面，制备 细长活性杆（5）具有与所述几何形状相同的横截面，所述方法包括至少一个切割步骤和一个步骤，将至少一个掺杂块（6）和至少一个未掺杂块（7,8 ）和从活性杆（5）形成多个活性元件的方法，所述形成方法包括沿着活性杆（5）横向切割的至少一个步骤和共同处理活性元件表面的步骤， 是连续进行的

公开(公告)号：US06373868B1

公开(公告)日：2002-04-16

申请号：US08861247

申请日：1997-05-21

Applicant: Tong Zhang

Inventor： Tong Zhang

IPC: H01S3098

CPC classification number: H01S3/109 ,  G02B6/34 ,  H01S3/025 ,  H01S3/0405 ,  H01S3/0606 ,  H01S3/061 ,  H01S3/0612 ,  H01S3/0615 ,  H01S3/08095 ,  H01S3/094019 ,  H01S3/094038 ,  H01S3/094057 ,  H01S3/09408 ,  H01S3/094084 ,  H01S3/0941

Abstract: Key technologies have been developed in realizing single longitudinal mode CW operation with a regular standing-wave cavity for intracavity frequency doubling and intracavity frequency conversions, so as to produce all solid-state, true cw devices with operation over wide spectral ranges including green, blue and UV. In one method, a beam expander (23 or 41) is applied to render a large mode waist and an improved beam divergence so as to greatly reduce the insertion losses for intracavity optical elements (17, 18 or 44). In another method, when spatial hole burning effect is minimized by using a pump head (12) with a thin gain zone (2), then a low resolving-power spectral filter with low loss can be utilized. In addition, several novel optical multipass constructions, typically by use of total-internal-reflection, have also been devised for pumping laser chips, laser rods, laser slabs, and for the use of multipass optical amplifier and pumping fiber lasers.

Abstract translation: 已经开发了关键技术，用于实现单纵向CW操作，并具有用于腔内倍频和腔内频率转换的常规驻波腔，以便产生在宽光谱范围内运行的所有固态，真正的cw器件，包括绿色，蓝色 和紫外线。 在一种方法中，施加光束扩展器（23或41）以渲染大模式腰部和改进的光束发散，以便大大减小腔内光学元件（17,18或44）的插入损耗。 在另一种方法中，当通过使用具有薄增益区（2）的泵头（12）来最小化空间空穴燃烧效应时，可以利用具有低损耗的低分辨率功率谱滤波器。 此外，还设计了通常使用全内反射的几种新颖的光学多通道结构，用于泵浦激光芯片，激光棒，激光板以及用于多通道光放大器和泵浦光纤激光器。

公开(公告)号：US6115400A

公开(公告)日：2000-09-05

申请号：US138276

申请日：1998-08-20

Applicant: David C. Brown

Inventor： David C. Brown

IPC: H01S3/06 ,  H01S3/081

CPC classification number: H01S3/0615 ,  H01S2301/02 ,  H01S3/025 ,  H01S3/0407 ,  H01S3/061 ,  H01S3/0612 ,  H01S3/08095 ,  H01S3/094084 ,  H01S3/0941 ,  H01S3/1643

Abstract: A total-internal-reflection thermally compensated rod laser including a lasing rod composed of crystalline or glass material doped with at least one lasing ion. The rod has an optical axis, an axially extending, substantially optically flat, exterior surface, and a substantially optically flat conical surface at each end. Both conical end surfaces are coaxial with the optical axis and has a truncated tip. The first end has a convex surface and the second end has a concave surface. The rod has a geometry, including a diameter and a length, selected to provide substantially no net depolarization of an incident beam.

Abstract translation: 一种全内反射热补偿棒激光器，其包括由掺杂有至少一个激光离子的晶体或玻璃材料构成的激光棒。 杆具有光轴，轴向延伸，基本上光学平坦的外表面，并且在每个端部具有基本上光学上平坦的圆锥形表面。 两个锥形端面与光轴同轴并具有截头。 第一端具有凸面，第二端具有凹面。 杆具有包括直径和长度的几何形状，其被选择为基本上不提供入射光束的净去极化。

公开(公告)号：US6055263A

公开(公告)日：2000-04-25

申请号：US930345

申请日：1997-09-30

Applicant: Norio Karube ,  Nobuaki Iehisa ,  Kenji Mitsui

Inventor： Norio Karube ,  Nobuaki Iehisa ,  Kenji Mitsui

IPC: H01S3/06 ,  H01S3/07 ,  H01S3/08 ,  H01S3/0941 ,  H01S3/16

CPC classification number: H01S3/0941 ,  H01S3/0606 ,  H01S3/0612 ,  H01S3/0615 ,  H01S3/08095 ,  H01S3/093

Abstract: A solid-state laser oscillating device which is inexpensive and capable of obtaining a high power. A plurality of laser crystals (YAG laser crystals, etc.) (1a, 1b, 1c) are arranged along the optical axis of an optical resonator so as to maintain optical contact with one another. Adjacent ones of the laser crystals have surfaces facing each other with an adhesive layer (10, 20) interposed therebetween, to form an array in a straight-line as a whole. An adhesive having a low light absorbance with respect to a laser beam of oscillation wavelength or an excitation light is used for forming the adhesive layers (10, 20). If the refractive index of the adhesive is substantially equal to that of the laser crystals, optical matching is achieved. The adhesive layers (10, 20) may be replaced by some other transparent material. The adjacent laser crystals may be arranged with a narrow gap therebetween or held in surface contact with each other.

Abstract translation: PCT No.PCT / JP97 / 00260 Sec。 371日期：1997年9月30日 102（e）1997年9月30日PCT PCT 1997年2月3日PCT公布。 公开号WO97 / 28585 PCT 日期：1997年8月7日一种廉价且能够获得高功率的固体激光振荡装置。 沿着光谐振器的光轴布置多个激光晶体（YAG激光晶体等）（1a，1b，1c），以保持彼此的光学接触。 相邻的激光晶体具有彼此面对的表面，其间插入有粘合剂层（10,20），以形成整体上的直线阵列。 使用相对于振荡波长的激光束或激发光具有低吸光度的粘合剂来形成粘合剂层（10,20）。 如果粘合剂的折射率基本上等于激光晶体的折射率，则实现光学匹配。 粘合剂层（10,20）可以被一些其它透明材料代替。 相邻的激光晶体可以布置成彼此之间的窄间隙或彼此保持表面接触。

公开(公告)号：US6055260A

公开(公告)日：2000-04-25

申请号：US994796

申请日：1997-12-19

Applicant: Robert W. Byren ,  Julie L. Bentley ,  Robin A. Reeder

Inventor： Robert W. Byren ,  Julie L. Bentley ,  Robin A. Reeder

IPC: H01S3/042 ,  H01S3/06 ,  H01S3/08 ,  H01S3/094 ,  H01S3/0941

CPC classification number: H01S3/0941 ,  H01S3/094 ,  H01S3/042 ,  H01S3/0606 ,  H01S3/0612 ,  H01S3/0617 ,  H01S3/08072 ,  H01S3/094057 ,  H01S3/094084

Abstract: A laser pump cavity apparatus with integral concentrator provides uniform gain and high absorption efficiency. The apparatus has a doped solid-state laser medium, a concentrator which has a top cladding layer formed on the top surface of the doped laser medium having a cylindrical focusing surface, a bottom cladding layer formed on the bottom surface of the doped laser crystal having a cylindrical focusing surface, and edge cladding layers formed on the side surfaces of the doped laser medium. Cold plates, each of which also preferably has one cylindrical surface of substantially identical shape, are placed in thermal contact with the cylindrical focusing surfaces of the top and bottom cladding layers to absorb heat. The cylindrical focusing surfaces preferably have hyperbolic or quasi-hyperbolic shape. The laser pump cavity apparatus is preferably edge-pumped with several laser diode arrays focused toward the line foci of the cylindrical focusing surfaces in directions transverse to a laser beam axis.

Abstract translation: 具有集成式集中器的激光泵腔设备提供均匀的增益和高的吸收效率。 该装置具有掺杂的固体激光介质，集中器，其具有形成在具有圆柱形聚焦表面的掺杂激光介质的顶表面上的顶部包层，形成在掺杂激光晶体的底表面上的底部包层， 圆柱形聚焦表面和形成在掺杂激光介质的侧表面上的边缘覆层。 每个也优选具有一个基本相同形状的圆柱形表面的冷板与顶部和底部包层的圆柱形聚焦表面热接触以吸收热量。 圆柱形聚焦表面优选具有双曲线或准双曲线形状。 激光泵腔装置优选地被边缘泵浦，其中几个激光二极管阵列在垂直于激光束轴线的方向上朝着圆柱形聚焦表面的线焦点聚焦。

公开(公告)号：US5841805A

公开(公告)日：1998-11-24

申请号：US783646

申请日：1997-01-14

Applicant: Hagop Injeyan ,  Jacqueline G. Berg

Inventor： Hagop Injeyan ,  Jacqueline G. Berg

IPC: H01S3/04 ,  H01S3/042 ,  H01S3/06 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/10 ,  H01S3/16 ,  H01S3/09

CPC classification number: H01S3/0941 ,  H01S3/042 ,  H01S3/0606 ,  H01S3/025 ,  H01S3/0407 ,  H01S3/0612 ,  H01S3/08095 ,  H01S3/10076 ,  H01S3/2333

Abstract: The present invention provides a solid state laser gain medium 28 comprising: (a) a gain layer 30 having pump regions 32 and first and second contact regions 34 and 36, respectively; (b) a first transparent layer 38 optically connected to the first contact region 34 of the gain layer 30 by diffusion bonding; and (c) a second transparent layer 40 optically connected to the second contact region 36 of the gain layer 30 by diffusion bonding. The transparent layers 38 and 40 are transparent to the lasing wavelength of the gain medium 28. The present invention also provides an apparatus for amplifying laser light, comprising: (a) a solid state, slab geometry gain medium 44 having lateral pump faces 46 and a principal radiation absorption axis C; and (b) an excitation mechanism 48 located along the pump faces 46 of the gain medium 44 for generating polarized light along a polarization axis 52 wherein the polarization axis 52 is parallel with the principal absorption axis C of the gain medium 44 to provide increased radiation absorption. The present invention also provides a cooling system 58 for a solid state gain medium 60 generating laser output laser emission at a wavelength from about 2 .mu.m to about 3 .mu.m. The cooling system 58 including a coolant material such as D2O for reducing absorption of laser emissions by the coolant at wavelengths from about 2 .mu.m to about 3 .mu.m.

Abstract translation: 本发明提供了一种固态激光增益介质28，其包括：（a）分别具有泵浦区域32和第一和第二接触区域34和36的增益层30; （b）通过扩散接合与增益层30的第一接触区域34光学连接的第一透明层38; 和（c）通过扩散接合与增益层30的第二接触区域36光学连接的第二透明层40。 透明层38和40对于增益介质28的激光波长是透明的。本发明还提供了一种用于放大激光的设备，包括：（a）固态板坯几何增益介质44，其具有侧向泵面46和 主辐射吸收轴C; 和（b）沿着增益介质44的泵面46定位的激励机构48，用于沿着偏振轴52产生偏振光，其中偏振轴52与增益介质44的主吸收轴C平行，以提供增加的辐射 吸收。 本发明还提供了一种用于固态增益介质60的冷却系统58，其产生波长为约2μm至约3μm的激光输出激光发射。 冷却系统58包括诸如D 2 O的冷却剂材料，用于减少冷却剂在约2μm至约3μm波长处的激光发射的吸收。

公开(公告)号：US5796770A

公开(公告)日：1998-08-18

申请号：US540732

申请日：1995-10-11

Applicant: Eduard Gregor ,  Tzeng S. Chen ,  Hans W. Bruesselbach

Inventor： Eduard Gregor ,  Tzeng S. Chen ,  Hans W. Bruesselbach

IPC: H01S3/02 ,  H01S3/042 ,  H01S3/06 ,  H01S3/08 ,  H01S3/0941

CPC classification number: H01S3/0941 ,  H01S3/025 ,  H01S3/042 ,  H01S3/061 ,  H01S3/0612 ,  H01S3/0625 ,  H01S3/08059 ,  H01S3/08072 ,  H01S3/094084

Abstract: A compact diode pumped laser including a nonuniform, single- or double-sided diode pumped laser head and a polarization output coupled (POC) resonator. The POC resonator employs reflections from two opposing uncrossed roof prism mirrors to produce a uniform near field and far field beam with diffraction or near diffraction limited quality. The single laser head particularly includes a laser rod, a sapphire envelope located about the rod, an area of antireflection coating located on the sapphire envelope between the rod and the diode array, and a high reflectivity nickel-plated indium layer located on the sapphire envelope on the surface thereof outside of the area of antireflection coating.

Abstract translation: 一种紧凑型二极管泵浦激光器，包括不均匀，单面或双面二极管泵浦激光头和极化输出耦合（POC）谐振器。 POC谐振器采用来自两个相对的未交叉屋顶棱镜镜的反射，以产生具有衍射或近衍射限制质量的均匀近场和远场光束。 单个激光头特别包括激光棒，位于棒周围的蓝宝石外壳，位于棒和二极管阵列之间的蓝宝石外壳上的防反射涂层区域和位于蓝宝石外壳上的高反射率镀镍铟层 在防反射涂层区域外的表面上。

公开(公告)号：US5796766A

公开(公告)日：1998-08-18

申请号：US784051

申请日：1997-01-17

Applicant: David E. Hargis ,  Sven E. Nelte

Inventor： David E. Hargis ,  Sven E. Nelte

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

CPC classification number: H01S3/0627 ,  H01S3/042 ,  H01S3/082 ,  H01S3/109 ,  G02F2001/3503 ,  H01S2302/00 ,  H01S2303/00 ,  H01S3/025 ,  H01S3/0401 ,  H01S3/0405 ,  H01S3/0602 ,  H01S3/0604 ,  H01S3/0612 ,  H01S3/0815 ,  H01S3/0816 ,  H01S3/09415 ,  H01S3/1611 ,  H01S3/1671 ,  H01S3/1673

Abstract: A longitudinally-cooled laser element assembly comprises an optically transparent heat sink (OTH) coupled to a laser element and a heat sink. An etalon structure including a first flat surface and a second, substantially parallel flat surface is formed in the laser element and/or the OTH. In some embodiments, a balanced etalon is provided by forming a reflector on the second flat surface of the etalon that has a reflectivity approximately equal to the Fresnel loss at the interface between the OTH and the laser element. In some embodiments the laser element assembly includes a second OTH coupled to the laser element at a second interface, thereby defining a second Fresnel loss. Preferably, the second OTH has an index of refraction substantially equal to the index of refraction of the first OTH, so that said first and second Fresnel losses are approximately equal and a balanced etalon is formed. In some embodiments the laser element comprises a solid-state gain medium. In other embodiments the laser element comprises a nonlinear frequency conversion crystal. An intracavity frequency-converted laser is described in which OTHs are used to cool both the gain medium and the nonlinear material.

Abstract translation: 纵向冷却激光元件组件包括耦合到激光元件和散热器的光学透明散热器（OTH）。 在激光元件和/或OTH中形成包括第一平坦表面和第二基本上平行的平坦表面的标准具结构。 在一些实施例中，通过在标准具的第二平坦表面上形成具有近似等于OTH和激光元件之间的界面处的菲涅耳损耗的反射率的反射器来提供平衡的标准具。 在一些实施例中，激光元件组件包括在第二界面处耦合到激光元件的第二OTH，从而限定第二菲涅耳损耗。 优选地，第二OTH具有基本上等于第一OTH的折射率的折射率，使得所述第一和第二菲涅尔损耗近似相等，并且形成平衡的标准具。 在一些实施例中，激光元件包括固态增益介质。 在其他实施例中，激光元件包括非线性频率转换晶体。 描述了腔内频率转换激光器，其中使用OTH来冷却增益介质和非线性材料。

公开(公告)号：US5751751A

公开(公告)日：1998-05-12

申请号：US731823

申请日：1996-10-21

Applicant: David E. Hargis ,  Sven E. Nelte

Inventor： David E. Hargis ,  Sven E. Nelte

IPC: G02F1/37 ,  H01S3/04 ,  H01S3/06 ,  H01S3/0941 ,  H01S3/109 ,  H01S3/16

CPC classification number: H01S3/0627 ,  H01S3/109 ,  H01S2302/00 ,  H01S2303/00 ,  H01S3/0405 ,  H01S3/0602 ,  H01S3/0604 ,  H01S3/0612 ,  H01S3/0615 ,  H01S3/07 ,  H01S3/0809 ,  H01S3/09415 ,  H01S3/1611 ,  H01S3/1671

Abstract: A monolithic diode pumped solid-state laser (11) comprising as the laser host neodymium-doped yttrium orthovanadate (Nd:YVO.sub.4) (12, 52) or neodymium-doped gadolinium orthovanadate (Nd:GdVO.sub.4) (57, 67) operating on the .sup.4 F.sub.3/2 .fwdarw..sup.4 I.sub.9/2 (.about.914 nm or .about.912 nm respectively) transition, to which a suitable nonlinear optic material (16), such as potassium niobate (KNbO.sub.3) or beta barium borate (BBO), is bonded. The nonlinear crystal gives rise to intracavity frequency doubling to .about.457 or .about.456 nm. The microlaser is a composite cavity formed from a gain medium crystal and a nonlinear frequency doubling material which together have four spaced parallel dielectrically coated faces (14, 17, 18, 15) and which is positioned in close proximity to a diode laser pump source (13) for phase-matched harmonic generation of blue light along an axis of propagation which lies substantially perpendicular to the two faces of the composite cavity. By employing specific doping concentration-lengths products of lasant material and pumping the gain medium which has a specific crystalline orientation the desired efficient blue microlaser is achieved. Alternative embodiments combine the Nd:YVO.sub.4 and Nd:GdVO.sub.4 elements to enhance certain output characteristics of the laser.

公开(公告)号：US5373527A

公开(公告)日：1994-12-13

申请号：US106701

申请日：1993-08-16

Applicant: Yoshito Taniu ,  Koichiro Wazumi ,  Akihiro Nishimi ,  Fumio Matsuzaka ,  Kenichi Ueda

Inventor： Yoshito Taniu ,  Koichiro Wazumi ,  Akihiro Nishimi ,  Fumio Matsuzaka ,  Kenichi Ueda

IPC: H01S3/093 ,  H01S3/094 ,  H01S3/091

CPC classification number: H01S3/094084 ,  H01S2301/20 ,  H01S3/025 ,  H01S3/0612 ,  H01S3/094007 ,  H01S3/094038 ,  H01S3/094053

Abstract: A laser generating apparatus provided with the following is disclosed. That is to say, a rod shaped laser medium for receiving excitation light irradiation and emitting laser light having a prespecified wavelength, a reflecting tube having a central axis and possessing a rotating surface and two end surfaces, wherein an inner surface is made a reflecting surface, and the rod shaped laser medium is stored therewithin, and a virtual light source formation mechanism for forming an excitation virtual light source which can be construed as a point light source or a line light source, in the vicinity of the central axis. By means of this, a virtual light source having an energy distribution concentrated in the central part is formed, and it is possible to increase excitation efficiency.

Abstract translation: 本发明公开了一种具备以下功能的激光发生装置。 也就是说，用于接收激发光照射并发射具有预定波长的激光的棒状激光介质，具有中心轴并具有旋转表面和两个端表面的反射管，其中内表面被制成反射表面 并且棒形激光介质存储在其中;以及虚拟光源形成机构，用于在中心轴附近形成可被解释为点光源或线光源的激发虚拟光源。 由此，形成具有集中在中央部的能量分布的虚拟光源，能够提高励磁效率。