公开(公告)号：US09160134B2

公开(公告)日：2015-10-13

申请号：US14137236

申请日：2013-12-20

Applicant: Tsinghua University ,  HON HAI PRECISION INDUSTRY CO., LTD.

Inventor： Jun Zhu ,  Jing-Lei Zhu ,  Qun-Qing Li ,  Kai-Li Jiang ,  Chen Feng ,  Guo-Fan Jin ,  Shou-Shan Fan

IPC: H01S3/08 ,  H01S3/223

CPC classification number: H01S3/08068 ,  H01S3/2232

Abstract: A laser includes a total reflective mirror, an output mirror, a discharge lamp, and an active laser medium. The total reflective mirror, the output mirror, and the discharge lamp define a resonant cavity. The active laser medium is filled in the resonant cavity. The total reflective mirror includes a microstructure. The microstructure is convex ring-shaped structure. The convex ring-shaped structure has a height and a width, and both the height and the width are in a range from about 0.5λ to about 2λ, while λ is a working wavelength of the laser.

Abstract translation: 激光器包括全反射镜，输出镜，放电灯和有源激光介质。 总反射镜，输出反射镜和放电灯限定谐振腔。 激活的激光介质填充在谐振腔中。 总反射镜包括微结构。 微结构是凸环形结构。 凸形环形结构具有高度和宽度，高度和宽度都在约0.5λ至约2λ的范围内，而λ是激光的工作波长。

公开(公告)号：US09153941B2

公开(公告)日：2015-10-06

申请号：US13391295

申请日：2010-08-16

Applicant: Holger Moench ,  Stephan Gronenborn

Inventor： Holger Moench ,  Stephan Gronenborn

IPC: H01S5/183 ,  H01S5/14 ,  H01S5/187

CPC classification number: H01S5/18388 ,  H01S3/08068 ,  H01S5/0287 ,  H01S5/1021 ,  H01S5/105 ,  H01S5/14 ,  H01S5/141 ,  H01S5/18394 ,  H01S5/187 ,  H01S2301/18 ,  H01S2301/203

Abstract: The present invention relates to a laser device comprising at least one large area VCSEL (101) and at least one optical feedback element (201, 301) providing an angular-selective feedback for laser radiation emitted from the laser. The angular-selective feedback is higher for at least one portion of laser radiation emitted at angles θ>0 to the optical axis (601) of the laser than for laser radiation emitted on said optical axis (601). The invention also refers to a method of stabilizing a laser emission of a large area VCSEL in a desired angular distribution (501, 502). With the proposed device and method, the intensity distribution of a large area VCSEL can be stabilized in a desired shape, for example a ring shape.

Abstract translation: 本发明涉及一种激光装置，其包括至少一个大面积VCSEL（101）和至少一个光学反馈元件（201,301），其提供从激光器发射的激光辐射的角度选择反馈。 角度选择反馈对于激光辐射的角度和角度发射的至少一部分比激光的光轴（601）大于在所述光轴（601）上发射的激光辐射的角度选择反馈。 本发明还涉及一种稳定所需角度分布（501,502）中的大面积VCSEL的激光发射的方法。 利用所提出的装置和方法，大面积VCSEL的强度分布可以稳定在期望的形状，例如环形。

公开(公告)号：US20150110146A1

公开(公告)日：2015-04-23

申请号：US14395847

申请日：2012-11-15

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Stephan Gronenborn

IPC: H01S5/04

CPC classification number: H01S5/041 ,  H01S3/025 ,  H01S3/0405 ,  H01S3/042 ,  H01S3/061 ,  H01S3/08068 ,  H01S3/09408 ,  H01S3/09415 ,  H01S5/0071 ,  H01S5/02248 ,  H01S5/02438 ,  H01S5/4025

Abstract: The present invention relates to an optically pumped solid state laser device, comprising a solid state laser medium (300-302) in a laser resonator. Several pump laser diodes (100) are arranged to optically pump said solid state laser medium (300-302) by reflection of pump radiation at a mirror element (200) arranged on the optical axis of the laser resonator. The mirror element (200) is designed to direct said pump radiation to the solid state laser medium (300-302) and to form at the same time one of the resonator mirrors of the laser resonator. With this design of the solid state laser device an easy alignment of the pump optics is achieved. The proposed solid state laser device can be realized in a compact form.

Abstract translation: 本发明涉及一种光泵浦固体激光器件，其包括在激光谐振器中的固态激光介质（300-302）。 几个泵激光二极管（100）被布置成通过在布置在激光谐振器的光轴上的反射镜元件（200）处的反射泵浦所述固态激光介质（300-302）来泵浦。 反射镜元件（200）被设计成将所述泵浦辐射引导到固态激光介质（300-302）并且同时形成激光谐振器的谐振镜之一。 利用固态激光器件的这种设计，实现了泵光学元件的容易对准。 所提出的固态激光器件可以以紧凑的形式实现。

公开(公告)号：US08340143B2

公开(公告)日：2012-12-25

申请号：US12669951

申请日：2009-08-20

Applicant: Zhongwei Fan ,  Yunfeng Ma ,  Gang Niu

Inventor： Zhongwei Fan ,  Yunfeng Ma ,  Gang Niu

IPC: H01S3/098

CPC classification number: H01S3/1118 ,  H01S3/0621 ,  H01S3/08068 ,  H01S3/0813 ,  H01S3/0817 ,  H01S3/09415 ,  H01S3/10061 ,  H01S3/1671

Abstract: A passively mode-locked picosecond laser device comprising a pump source, a laser crystal, a laser cavity, a mode-locked output structure is provided. In the device, the pump source is placed at the side of the incident end surface of the laser crystal; the laser cavity includes a plane reflective mirror and a first plano-concave mirror, the reflective mirror is placed opposite to the concave surface of the plano-concave mirror and located on the position of the focal radius of the plano-concave mirror. The normal direction of the reflective mirror and the axis of the plano-concave mirror form a small angle therebetween; the laser generated from the laser crystal oscillates in the laser cavity, and output through the mode-locked output structure. The device uses a stable cavity design of the equivalent confocal cavity, which can increase the optical path, reduce the repetition frequency, and significantly reduce the cavity length and volume.

Abstract translation: 提供了包括泵浦源，激光晶体，激光腔，锁模输出结构的被动锁模皮秒激光器件。 在该装置中，泵浦源位于激光晶体入射端面的一侧; 激光腔包括平面反射镜和第一平凹镜，反射镜与平凹镜的凹面相对放置并位于平凹镜的焦点半径的位置上。 反射镜的法线方向和平凹镜的轴线在它们之间形成小的角度; 激光产生的激光在激光腔中振荡，并通过锁模输出结构输出。 该器件使用等效共焦腔的稳定腔设计，可以增加光路，减少重复频率，并显着降低腔体长度和体积。

公开(公告)号：US20120039345A1

公开(公告)日：2012-02-16

申请号：US12669951

申请日：2009-08-20

Applicant: Zhongwei Fan ,  Yunfeng Ma ,  Gang Niu

Inventor： Zhongwei Fan ,  Yunfeng Ma ,  Gang Niu

IPC: H01S3/098

CPC classification number: H01S3/1118 ,  H01S3/0621 ,  H01S3/08068 ,  H01S3/0813 ,  H01S3/0817 ,  H01S3/09415 ,  H01S3/10061 ,  H01S3/1671

Abstract: A passively mode-locked picosecond laser device comprising a pump source, a laser crystal, a laser cavity, a mode-locked output structure is provided. In the device, the pump source is placed at the side of the incident end surface of the laser crystal; the laser cavity includes a plane reflective mirror and a first plano-concave mirror, the reflective mirror is placed opposite to the concave surface of the plano-concave mirror and located on the position of the focal radius of the plano-concave mirror. The normal direction of the reflective mirror and the axis of the plano-concave mirror form a small angle therebetween; the laser generated from the laser crystal oscillates in the laser cavity, and output through the mode-locked output structure. The device uses a stable cavity design of the equivalent confocal cavity, which can increase the optical path, reduce the repetition frequency, and significantly reduce the cavity length and volume.

Abstract translation: 提供了包括泵浦源，激光晶体，激光腔，锁模输出结构的被动锁模皮秒激光器件。 在该装置中，泵浦源位于激光晶体入射端面的一侧; 激光腔包括平面反射镜和第一平凹镜，反射镜与平凹镜的凹面相对放置并位于平凹镜的焦点半径的位置上。 反射镜的法线方向和平凹镜的轴线在它们之间形成小的角度; 激光产生的激光在激光腔中振荡，并通过锁模输出结构输出。 该器件使用等效共焦腔的稳定腔设计，可以增加光路，减少重复频率，并显着降低腔体长度和体积。

公开(公告)号：US07463668B2

公开(公告)日：2008-12-09

申请号：US10529437

申请日：2002-09-25

Applicant: Wolf Steffens ,  Andreas Schmidt ,  Jens Heitkamp ,  Udo Haberland

Inventor： Wolf Steffens ,  Andreas Schmidt ,  Jens Heitkamp ,  Udo Haberland

IPC: H01S3/08 ,  H01S3/10

CPC classification number: H01S3/1055 ,  H01S3/08068

Abstract: A wavelength tunable cavity includes a first reflecting unit adapted to at least partially reflect a beam of electromagnetic radiation towards a second reflecting unit, adapted to at least partially reflect a beam of electromagnetic radiation back towards said first reflecting unit, both reflecting units providing resonance modes of said electromagnetic radiation within said cavity, wherein an optical path of said beam within said cavity is defined in length by said first and second reflecting unit, a grating arranged within said optical path of said beam reflected by said first reflecting unit, said grating adapted for tuning the wavelength of said beam, wherein said at least one second reflecting unit is rotatable about an axis by at least 360 degrees along a circle path with respect to said grating, said circle path including at least a portion arranged to intersect with said beam, which is redirected by said grating.

Abstract translation: 波长可调谐腔包括第一反射单元，其适于至少部分地将朝向第二反射单元的电磁辐射束反射，适于至少部分地将电磁辐射束反射回所述第一反射单元，两个反射单元提供谐振模式 所述空腔内的所述电磁辐射的光路，其中所述腔内的所述光束的光路被所述第一和第二反射单元的长度限定，布置在由所述第一反射单元反射的所述光束的所述光路内的光栅，所述光栅适于 用于调谐所述光束的波长，其中所述至少一个第二反射单元可相对于所述光栅沿着圆周路径绕轴线旋转至少360度，所述圆形路径至少包括与所述光束相交的部分 ，其被所述光栅重定向。

公开(公告)号：US07415057B2

公开(公告)日：2008-08-19

申请号：US11061380

申请日：2005-02-18

Applicant: Thomas Hall

Inventor： Thomas Hall

IPC: H01S3/08

CPC classification number: H01S3/08081 ,  H01S3/036 ,  H01S3/08068 ,  H01S3/22

Abstract: An unstable optical resonator for an optically active medium comprising a spherical back mirror and a spherical outcoupling mirror is proposed, and an outcoupling which is asymmetrical in relation to the optical axis takes place therein.

Abstract translation: 提出了一种用于光学活性介质的不稳定光学谐振器，其包括球面后反射镜和球形外耦合反射镜，并且在其中发生相对于光轴不对称的输出耦合。

公开(公告)号：US20070133643A1

公开(公告)日：2007-06-14

申请号：US11299175

申请日：2005-12-12

Applicant: Herb Seguin

Inventor： Herb Seguin

IPC: H01S3/04 ,  H01S3/22 ,  H01S3/09

CPC classification number: H01S3/073 ,  H01S3/0407 ,  H01S3/08068 ,  H01S3/08081 ,  H01S3/0941 ,  H01S3/0975

Abstract: A laser device is comprised of multiple RF excited, diffusion-cooled slab-geometry laser-gain-channels all mounted in a radial-array configuration to provide a multi-channel laser system capable of both high average and peak laser output power, in a extremely small, lightweight and relatively low cost physical package, ideally suited to robotic applications. The concept utilizes a simple and effective methodology for multiple beamlet coupling and stacking which collectively yield a composite laser output beam of excellent efficiency, stability and optical quality.

Abstract translation: 激光装置由多个RF激发的，扩散冷却的平板几何形状的激光增益通道组成，全部安装在径向阵列配置中，以提供能够具有高平均和峰值激光输出功率的多通道激光系统， 非常小，重量轻且成本相对较低的物理封装，非常适合机器人应用。 该概念利用简单有效的多束子束耦合和堆叠方法，共同产生了出色的效率，稳定性和光学质量的复合激光输出光束。

公开(公告)号：US20050195881A1

公开(公告)日：2005-09-08

申请号：US11061380

申请日：2005-02-18

Applicant: Thomas Hall

Inventor： Thomas Hall

IPC: H01S3/036 ,  H01S3/08 ,  H01S3/22

CPC classification number: H01S3/08081 ,  H01S3/036 ,  H01S3/08068 ,  H01S3/22

Abstract: An unstable optical resonator for an optically active medium comprising a spherical back mirror and a spherical outcoupling mirror is proposed, and an outcoupling which is asymmetrical in relation to the optical axis takes place therein.

Abstract translation: 提出了一种用于光学活性介质的不稳定光学谐振器，其包括球面后反射镜和球形外耦合反射镜，并且在其中发生相对于光轴不对称的输出耦合。

公开(公告)号：US20050047473A1

公开(公告)日：2005-03-03

申请号：US10651747

申请日：2003-08-29

Applicant: Russell Gruhlke ,  Charles Hoke

Inventor： Russell Gruhlke ,  Charles Hoke

IPC: H01S3/08 ,  H01S5/00 ,  H01S5/14

CPC classification number: H01S5/141 ,  H01S3/08068 ,  H01S5/005 ,  H01S5/0654

Abstract: A method of enhancing wavelength tuning performance in an external cavity laser includes providing a diffractive focusing element, emitting light into the cavity of the laser at a range of angles relative to an optical axis of the cavity, and diffractively focusing the light back onto the optical axis at a wavelength-dependent focal distance using the diffractive focusing element. The method further includes confining the diffractive focusing to a high dispersivity portion of the diffractive focusing element. In various embodiments, the confining may include offsetting the diffractive focusing element radially relative to the optical axis, or selectively blocking a portion of the light emitted into the cavity at emission angles less than a threshold emission angle.

Abstract translation: 一种增强外腔激光器中的波长调谐性能的方法包括：提供衍射聚焦元件，以相对于空腔的光轴的角度范围将光发射到激光器的腔中，并将光衍射地聚焦到光学 使用衍射聚焦元件以波长相关的焦距。 该方法还包括将衍射聚焦限制在衍射聚焦元件的高分散性部分。 在各种实施例中，约束可以包括使衍射聚焦元件相对于光轴径向偏移，或者以小于阈值发射角的发射角度选择性地阻挡发射到腔中的光的一部分。