公开(公告)号：US06980574B1

公开(公告)日：2005-12-27

申请号：US10623086

申请日：2003-07-18

Applicant: Yusong Yin ,  Samuil Karlsbrun

Inventor： Yusong Yin ,  Samuil Karlsbrun

IPC: H01S3/10 ,  H01S3/109 ,  H01S3/127

CPC classification number: H01S3/127 ,  H01S3/109

Abstract: According to the invention, a laser and a method of operating a laser which can produce multiple pulses from a single laser head is provided. A lasing medium is pumped by pumping source such as laser diodes, lamp and such. A modulator located in the cavity is turned on to induce a loss in the laser cavity sufficient to prevent lasing. A first predetermined amount of energy is stored in the lasing medium while the modulator is turned on due to a creation of a population inversion in the lasing medium in excess of the lasing threshold. The modulator is then turned off for a period of time to allow the lasing medium to provide a first pulse. The modulator is then turned on before the population inversion in the laser medium is depleted completely so that a predetermined amount of energy remains stored in the lasing medium. After the first pulse, the modulator again induces a loss in the cavity sufficient to prevent lasing. The modulator is maintained in the on position for a period of time to increase the amount of energy stored in the lasing medium. The modulator is then turned off for a third period of time to allow the lasing medium to produce a second pulse having a second controlled amount of pulse energy.

Abstract translation: 根据本发明，提供了可以从单个激光头产生多个脉冲的激光器和操作激光器的方法。 激光介质通过诸如激光二极管，灯等的泵浦源泵送。 位于空腔中的调制器导通，以致激光腔中的损耗足以防止激光发射。 由于在激光介质中产生超过激光阈值的总体反转，所以在激光介质中存储第一预定量的能量，同时调制器接通。 然后关闭调制器一段时间，以允许激光介质提供第一脉冲。 然后在激光介质中的群体反转完全耗尽之前，调制器被打开，使得预定量的能量保持存储在激光介质中。 在第一脉冲之后，调制器再次引起腔中的损耗，足以防止激光发射。 调制器保持在接通位置一段时间以增加存储在激光介质中的能量的量。 然后将调制器关闭第三时间段，以允许激光介质产生具有第二受控量脉冲能量的第二脉冲。

公开(公告)号：US06961355B1

公开(公告)日：2005-11-01

申请号：US10339241

申请日：2003-01-09

Applicant: Yusong Yin ,  Xiaojie Zhao ,  Jing Zhao ,  Samuil Karlsbrun

Inventor： Yusong Yin ,  Xiaojie Zhao ,  Jing Zhao ,  Samuil Karlsbrun

IPC: H01S3/10 ,  H01S3/106 ,  H01S3/107 ,  H01S3/109 ,  H01S3/11 ,  H01S3/16

CPC classification number: H01S3/117 ,  H01S3/0815 ,  H01S3/10038 ,  H01S3/107 ,  H01S3/109 ,  H01S3/115 ,  H01S3/1611

Abstract: Lasers are provided to deliver a wide variety of wavelengths at variable pulse energy. A laser cavity is formed between a first and second reflective surface. A lasing medium is located within cavity which lases at a preselected fundamental frequency. One or more nonlinear crystals are provided in optical communication with the lasing crystal to produce a secondary beam having a different frequency than the fundamental beam. A modulator is provided to control the pulse energy of the secondary beam. Desirably the secondary beam is a harmonic beam for example a second, third, fourth or fifth harmonic beam or a beam provided by an optical parametric oscillator.

Abstract translation: 提供激光以在可变的脉冲能量下提供多种波长。 在第一和第二反射表面之间形成激光腔。 激光介质位于腔内，以预选的基频发光。 提供与激光晶体光学通信的一个或多个非线性晶体，以产生具有与基波束不同的频率的次波束。 提供调制器来控制次级束的脉冲能量。 期望的次级光束是例如第二，第三，第四或第五谐波光束或由光参量振荡器提供的光束的谐波束。

公开(公告)号：US06587487B2

公开(公告)日：2003-07-01

申请号：US09741137

申请日：2000-12-19

Applicant: Yusong Yin

Inventor： Yusong Yin

IPC: H01S3102

CPC classification number: H01S3/109 ,  H01S3/082 ,  H01S3/09415 ,  H01S3/11 ,  H01S3/1611 ,  H01S3/1643 ,  H01S3/1653 ,  H01S3/1673

Abstract: Harmonic lasers are provided. A third harmonic laser includes a first high reflector and an output coupler forming a resonator cavity having an optical axis. The resonator cavity includes a laser medium for producing a fundamental beam. Desirably, the laser medium is Nd:YAG, Nd:YLF, Nd:YV04, although other laser mediums are also contemplated such as Ti:sapphire, Nd:YAB and the like. The laser medium can be pumped by any desired source for example laser, laser diode, laser diode bar, fiber coupled laser diode bar or lamp which are well known in the art. The laser medium can be either end pumped or side pumped which are also well known. The first high reflector is reflective of a fundamental beam. A second harmonic generator is located within the cavity formed between the first high reflector and the output coupler for generating a second harmonic beam from the fundamental beam. The output coupler is highly transmissive for second harmonic beam and partially transmissive for a fundamental beam. The fundamental beam and the second harmonic beam exit the output coupler before incidenting on a harmonic generator. The third harmonic generator is positioned external to the resonator cavity and is located along the optical path from the output coupler so that the fundamental and the second harmonic beams incident on the third harmonic generator where portions of the second and the fundamental are converted to third harmonic beam.

Abstract translation: 提供谐波激光器。 三次谐波激光器包括形成具有光轴的谐振腔的第一高反射器和输出耦合器。 谐振腔包括用于产生基波束的激光介质。 理想地，激光介质是Nd：YAG，Nd：YLF，Nd：YV04，尽管也可以考虑其它激光介质，例如Ti：蓝宝石，Nd：YAB等。 激光介质可以由本领域公知的任何所需的源例如激光，激光二极管，激光二极管棒，光纤耦合的激光二极管棒或灯来泵浦。 激光介质可以是端泵还是泵侧泵，也是众所周知的。 第一个高反射器反射基波束。 二次谐波发生器位于形成在第一高反射器和输出耦合器之间的腔内，用于从基波束产生二次谐波束。 输出耦合器对于二次谐波束是高度透射的，对于基波束是部分透射的。 在入射到谐波发生器之前，基波束和二次谐波波束离开输出耦合器。 三次谐波发生器位于谐振器腔的外部，并且沿着来自输出耦合器的光路定位，使得入射到三次谐波发生器上的基波和二次谐波入射，其中第二和基波的部分被转换为三次谐波 光束。

公开(公告)号：US5898717A

公开(公告)日：1999-04-27

申请号：US788772

申请日：1997-01-24

Applicant: Yusong Yin

Inventor： Yusong Yin

IPC: G02F1/35 ,  H01S3/109 ,  H05K3/00 ,  H01S3/10

CPC classification number: H01S3/109 ,  G02F2001/354 ,  H05K3/0017

Abstract: Third harmonic generated from intra-cavity frequency tripled resonator is disclosed in which type II phase matching crystal is used as the tripler. Type I phase matching is used for second harmonic generation. The resonator efficiently converts the fundamental laser frequency to its third harmonic laser beam. The laser is highly efficient with high third harmonic output stability. Overall conversion efficiency exceeds 25% and preferably is 50% or higher.

Abstract translation: 公开了从腔内频率三倍频谐振器产生的三次谐波，其中使用II型相位匹配晶体作为三倍频。 I型相位匹配用于二次谐波生成。 谐振器有效地将基本激光频率转换成其三次谐波激光束。 激光器高效率，高三次谐波输出稳定性。 总转换效率超过25％，优选为50％以上。

公开(公告)号：US07869471B1

公开(公告)日：2011-01-11

申请号：US11827703

申请日：2007-07-12

Applicant: Yusong Yin

Inventor： Yusong Yin

IPC: H01S3/10

CPC classification number: H01S3/1083 ,  G02F1/39 ,  H01S3/0811 ,  H01S3/0813 ,  H01S3/09415 ,  H01S3/115

Abstract: A tunable OPO laser is provided. The laser includes an OPO cavity containing an OPO nonlinear crystal for generating a plurality of preselected wavelength beams of different wavelengths. The OPO cavity is formed between a first OPO reflective surface and a second OPO reflective surface. A laser cavity containing a lasing medium for generating a preselected wavelength fundamental beam is provided in optical communication with the OPO cavity. The laser cavity is partially separate and partially overlapping the OPO cavity. A beam separating prism is located in the overlapping portion of the two cavities. The beam separating prism separates electromagnetic radiation propagating through the prism into spatially separate paths of different wavelength. At least one of the OPO reflecting surfaces is moveable over a preselected range to reflect a selected wavelength of electromagnetic radiation propagating from the prism for amplification in the OPO cavity.

Abstract translation: 提供可调OPO激光器。 该激光器包括一个包含用于产生多个不同波长的预选波长光束的OPO非线性晶体的OPO腔。 OPO腔形成在第一OPO反射表面和第二OPO反射表面之间。 提供与OPO腔光学连通的包含用于产生预选波长基波束的激光介质的激光腔。 激光腔是部分分离的，部分地与OPO腔重叠。 光束分离棱镜位于两个空腔的重叠部分中。 光束分离棱镜将通过棱镜传播的电磁辐射分离成不同波长的空间分离的路径。 OPO反射表面中的至少一个可在预选范围内移动，以反射从棱镜传播的选定波长的电磁辐射，以在OPO腔中放大。

公开(公告)号：US06999483B1

公开(公告)日：2006-02-14

申请号：US10603265

申请日：2003-06-24

Applicant: Yusong Yin

Inventor： Yusong Yin

IPC: H01S3/10

CPC classification number: H01S3/109 ,  H01S3/082 ,  H01S3/09415 ,  H01S3/11 ,  H01S3/1611 ,  H01S3/1643 ,  H01S3/1653 ,  H01S3/1673

Abstract: The invention relates to an improved harmonic laser which provides an externally generated harmonic beam. According to the invention, a third harmonic laser or higher harmonic laser is provided. The laser includes a first reflector and a second reflector for fundamental beam, forming a resonator cavity having an optical axis. The resonator includes a laser medium for producing a fundamental beam. The first reflector is highly reflective for fundamental beam. The second reflector is at least partially reflective for fundamental beam. A second harmonic generator is located within the resonator formed between the first high reflector and the second reflector for generating a second harmonic beam from the fundamental beam. Preferably the second harmonic generator is located so that the fundamental beam makes a first and second pass through the second harmonic generator. The resonator produces two output beams at least one of which is a harmonic beam. One or more output couplers are provided to remove at least a portion of the output beams. A third harmonic or higher generator is positioned external to the resonator cavity and is located along the optical path from the output coupler, so that the output beams from the resonator incidents on the third harmonic or higher generator where portions of the output beams are converted to third harmonic or higher beam.

Abstract translation: 本发明涉及提供外部产生的谐波束的改进的谐波激光器。 根据本发明，提供三次谐波激光或高次谐波激光。 激光器包括第一反射器和用于基波束的第二反射器，形成具有光轴的谐振腔。 谐振器包括用于产生基波束的激光介质。 第一反射器对于基波束是高反射性的。 第二反射器对于基波束至少是部分反射的。 二次谐波发生器位于形成在第一高反射器和第二反射器之间的谐振器内，用于从基波束产生二次谐波束。 优选地，二次谐波发生器被定位成使得基波束第一次和第二次通过二次谐波发生器。 谐振器产生两个输出光束，其中至少一个是谐波光束。 提供一个或多个输出耦合器以去除输出光束的至少一部分。 三次谐波或更高的发生器位于谐振器腔外部并且沿着来自输出耦合器的光路定位，使得来自谐振器的输出光束发生在三次谐波或更高发生器上，其中部分输出光束被转换为 三次谐波或更高的光束。

公开(公告)号：US06246707B1

公开(公告)日：2001-06-12

申请号：US09195477

申请日：1998-11-18

Applicant: Yusong Yin ,  Dmitry Donskoy

Inventor： Yusong Yin ,  Dmitry Donskoy

IPC: H01S310

CPC classification number: H01S3/08009 ,  H01S3/0812 ,  H01S3/094 ,  H01S3/1024

Abstract: A pulsed laser preferably a tunable laser having a narrow band width is provided which has a high conversion efficiency at a high repetition rate. The laser includes a diffraction grating located in the laser's optical cavity. The optical cavity is defined by a mirror and diffraction grating or two mirrors with a diffraction grating therebetween. A tunable laser material is located within the optical cavity between the mirror and the diffraction grating. Desirably the diffraction grating is movably mounted within the optical cavity so that a beam of a presected wave length diffracted by the grating can be directed across the laser material. Optionally where two mirrors define the optical cavity, one of the mirrors or the grating or both can be movably mounted within the optical cavity. Preferable the movable grating and the movable mirror are rotatably mounted.

Abstract translation: 提供脉冲激光器，优选具有窄带宽的可调激光器，其以高重复率具有高转换效率。 激光器包括位于激光器光腔中的衍射光栅。 光学腔由反射镜和衍射光栅或其间具有衍射光栅的两个反射镜限定。 可调激光材料位于反射镜和衍射光栅之间的光学腔内。 理想地，衍射光栅可移动地安装在光腔内，使得由光栅衍射的被预测波长的光束可以被引导穿过激光材料。 可选地，两个反射镜限定光腔，反射镜之一或光栅或两者可移动地安装在光腔内。 优选可移动光栅和可移动镜可旋转地安装。

公开(公告)号：US06061370A

公开(公告)日：2000-05-09

申请号：US277394

申请日：1999-03-26

Applicant: Yusong Yin

Inventor： Yusong Yin

IPC: H01S3/109 ,  H05K3/00 ,  H01S3/10

CPC classification number: H01S3/109 ,  H05K3/0026

Abstract: A fourth harmonic frequency generating method and apparatus is provided. The system includes within the optical cavity an active laser medium, a second harmonic generator for generating second harmonic frequency of the fundamental frequency emitted by the laser. The fundamental beam is directed to a second harmonic generation crystal where a portion of the fundamental beam is converted to a second harmonic beam. Both the second harmonic and unconverted fundamental beams are directed back across the second harmonic generator by reflective surfaces for a second pass prior to any conversion of second harmonic beam to a higher harmonic beam. Preferably the second harmonic and fundamental beams are reflected by one of the laser cavity reflective surfaces for the second pass. Optionally, there can be separate reflective surfaces to reflect each of the fundamental and second harmonic beams. A third harmonic generator for generating third harmonic frequency of the fundamental frequency, a fourth harmonic generator for generating a fourth harmonic frequency of the fundamental frequency and a wavelength selective coupling to facilitate the removal of the fourth harmonic beam from the optical cavity are provided in optical communication with the reflected second harmonic and fundamental beam. Optionally the unconverted second harmonic beam can be directed through the laser medium as additional pumping. Optionally substantially all UV beams are removed from the laser cavity preferably 99% or greater. The resulting laser has improved conversion efficiency and an improved mode quality.

Abstract translation: 提供了一种第四谐波频率产生方法和装置。 该系统在光腔内包括有源激光介质，二次谐波发生器，用于产生由激光器发射的基频的二次谐波频率。 基波束被引导到二次谐波产生晶体，其中基波束的一部分被转换成二次谐波波束。 在将二次谐波束转换成高次谐波束之前，二次谐波和未转换的基波束都通过反射表面引导回第二遍。 优选地，二次谐波和基波束被用于第二遍的激光腔反射表面之一反射。 可选地，可以有单独的反射表面以反射每个基波和二次谐波。 用于产生基频的三次谐波频率的三次谐波发生器，用于产生基频的第四谐波频率的四次谐波发生器和有助于从光腔移除四次谐波的波长选择耦合的光电二极管 与反射的二次谐波和基波束的通信。 可选地，未转换的二次谐波束可以作为额外的泵送被引导通过激光介质。 可选地，基本上所有UV光束优选地从激光腔去除99％以上。 所得到的激光器具有改进的转换效率和改进的模式质量。

公开(公告)号：US08817831B1

公开(公告)日：2014-08-26

申请号：US13815098

申请日：2013-01-30

Applicant: Matthew Terraciano ,  Yusong Yin ,  Andrea Burzo

Inventor： Matthew Terraciano ,  Yusong Yin ,  Andrea Burzo

IPC: H01S3/10

CPC classification number: H01S3/0092 ,  G02F1/3501 ,  G02F2001/3507 ,  H01S3/0071 ,  H01S3/027 ,  H01S3/1643 ,  H01S3/1673

Abstract: A method and apparatus for spatially separating beams with different wavelengths is presented. The system includes: a light source (i.e. a laser with multiple harmonic output beams) with multiple wavelengths emitted along a single beam path or very nearly collinear beam paths, a path which connects the light source to a wavelength dependent beam separator, and a second path for blocking unwanted output wavelengths which connects the beam separation region to the laser output.

Abstract translation: 提出了用于空间分离具有不同波长的波束的方法和装置。 该系统包括：具有沿着单个光束路径或非常接近共线的光束路径发射的多个波长的光源（即具有多个谐波输出光束的激光器），将光源连接到与波长相关的光束分离器的路径，以及第二 阻止不必要的输出波长的路径，将波束分离区域连接到激光输出端。

公开(公告)号：US07079557B1

公开(公告)日：2006-07-18

申请号：US10677826

申请日：2003-10-02

Applicant: Yusong Yin ,  Nan Yin ,  Frank F. Wu

Inventor： Yusong Yin ,  Nan Yin ,  Frank F. Wu

IPC: H01S3/10

CPC classification number: H01S3/1083 ,  H01S3/08086 ,  H01S3/09415 ,  H01S3/109 ,  H01S3/11 ,  H01S3/113 ,  H01S3/1611 ,  H01S3/1653

Abstract: A laser having an optical parametric oscillator for providing a preselected wavelength beam is provided. A nonlinear crystal cut for phase matching condition preferably cut for noncritical phase matching conditions for the fundamental beam wavelength and the preselected wavelength beam is located in both the optical parametric oscillator cavity and laser resonator cavity.The optical axis of the laser resonator and the optical axis of the optical parametric oscillator cavity are at least partially separate and partially overlap. The laser crystal is located in the laser resonator cavity but not in the optical parametric oscillator cavity. Each end of the OPO nonlinear crystal that intersects the optical axes has a Brewster cut for both the fundamental and preselected wavelength beams so that the fundamental and preselected wavelength beams incident on the nonlinear crystal at approximately the Brewster angle and pass through without substantial reflection loss.The fundamental wavelength beam is directed into the optical parametric oscillator cavity and incidents on nonlinear crystal having a Brewster cut at each end for fundamental and preselected wavelength beam without substantial reflection loss. A portion of the fundamental wavelength beam is partially converted to a preselected wavelength beam. The fundamental beam and the preselected wavelength beams are reflected back through the nonlinear crystal. Preselected wavelength beam is separated from the fundamental wavelength beam.

Abstract translation: 提供具有用于提供预选波长光束的光学参量振荡器的激光器。 针对基波束波长和预选波长光束的非临界相位匹配条件优选地切割用于相位匹配条件的非线性晶体切割位于光学参量振荡器腔和激光谐振腔中。 激光谐振器的光轴和光参量振荡器腔的光轴至少部分分开并部分重叠。 激光晶体位于激光谐振腔中，但不在光参量振荡器腔中。 与光轴相交的OPO非线性晶体的每个端部都具有基波和预选波长光束的布鲁斯特切割，使得基波和预选波长光束以大约布鲁斯特角入射到非线性晶体上并通过而没有实质的反射损耗。 基本波长光束被引导到光参量振荡器腔中，并且在具有布鲁斯特的非线性晶体上的事件在每个端部切割用于基波和预选波长波束而没有实质的反射损耗。 基波长光束的一部分被部分地转换成预选的波长光束。 基波束和预选波长光束通过非线性晶体反射回来。 预选波长光束与基波长光束分离。