公开(公告)号：WO2014063151A1

公开(公告)日：2014-04-24

申请号：PCT/US2013/065924

申请日：2013-10-21

Applicant: IPG PHOTONICS CORPORATION ,  VOLKSWAGEN AKTIENGESELLSCHAFT

Inventor： FOMIN, Valentin ,  STAROVOYTOV, Anton ,  ABRAMOV, Andrey ,  GAPONTSEV, Valentin ,  FUCHS, Artjom ,  SCHRAMM, Ingo ,  SCHERBAKOV, Eugene ,  MAMEROW, Holger ,  MICHALZIK, Andreas

IPC: B23K26/24

CPC classification number: B23K26/0096 ,  B23K26/032 ,  B23K26/082 ,  B23K26/142 ,  B23K26/22 ,  B23K26/24 ,  B23K26/705

Abstract: A hand displaceable laser welding gun is configured with an elongated support column extending along a longitudinal axis and made from lightweight material. A support plate is displaceably mounted to the column while supporting thereon an optical head which is provided with beam-guiding optics. The optics is configured to direct a laser beam along a path towards a welding zone through a protective window of the optical head. The laser welding gun further is structured with a first arm mounted to the support plate and extending along a longitudinal axis of the gun diametrically opposite to the optical head. The inner surface of the displaceable arm has an inner surface defining a tunnel which is aligned with the optical head and axially traversed by the laser beam, a first axially flowing stream of pressurized gaseous medium, and a second axially flowing stream of gaseous medium. The second stream, entering the tunnel at a pressure lower than that one of the first stream in response to a pressure gradient generated in the column, does not generate vortexes within the column. The first and second streams exit through the downstream end of the tunnel next to the welding zone. As the streams flow out, they carry out welding debris flowing within the tunnel before the debris reach the protective window of the optical head.

Abstract translation: 手可移动激光焊枪配置有沿着纵向轴线延伸并由轻质材料制成的细长支撑柱。 支撑板可移动地安装到柱上，同时在其上支撑设置有光束引导光学器件的光学头。 光学器件被配置为沿着通过光学头的保护窗口的焊接区域的路径引导激光束。 激光焊枪还具有安装到支撑板并沿着与光学头直径相对的枪的纵向轴线延伸的第一臂。 可移动臂的内表面具有限定隧道的内表面，其与光学头对准并且被激光束轴向穿过，第一轴向流动的加压气体介质流和第二轴向流动的气体介质流。 响应于塔中产生的压力梯度，第二流以比第一流低的压力进入隧道，不会在塔内产生涡流。 第一和第二物流通过邻近焊接区的隧道的下游端部流出。 当流流出时，它们在碎屑到达光学头的保护窗口之前，在隧道内进行焊接碎屑流动。

公开(公告)号：WO2017180623A1

公开(公告)日：2017-10-19

申请号：PCT/US2017/027007

申请日：2017-04-11

Applicant: IPG PHOTONICS CORPORATION

Inventor： GAPONTSEV, Valentin ,  KURATEV, lvan ,  BIRYUKOV, Roman ,  FEDYNA, Elena ,  PASHKO, Sergey ,  MELOVATSKY, Oleg ,  REZNIKOV, Alex ,  KOVYZHENKO, Nikolai ,  OULIANOV, Dmitri

IPC: G01N21/71 ,  G01J3/443

Abstract: The disclosed method and handheld analyzer of elemental concentration measurement is based on spectral analysis of high temperature highly ionized plasma generated by laser-generated pulses. Due to a high pulse energy and short pulse duration, high intensity singly and multiply charged ion lines in addition to neutral atomic lines are excited. The pulsed laser source of the disclosed analyzer is configured to output a train of pulses of signal light at a 1.5-1.6 signal wavelength at a pulse repetition rate from 0.1 to 50 kHz, pulses duration from 0.01 to 1.5 ns, pulse energy between 100 and 1000 uJ and has a beam spot on the surface of the sample varying 1 to 60 μm. The above-described parameters provide at least a 20 GW/cm 2 laser power density sufficient to induce a high temperature, highly ionized plasma (plasma) which allows measuring the carbon concentration in carbon steels by employing doubly charged ionic line CIII with a detection limit down to 0.01% and other elements commonly present in carbon steels with detection limit below 0.01%.

Abstract translation: 所公开的元素浓度测量方法和手持式分析仪基于由激光产生的脉冲产生的高温高度电离等离子体的光谱分析。 由于高脉冲能量和短脉冲持续时间，除了中性原子线之外，高强度的单电荷和多电荷离子线被激发。 所公开的分析仪的脉冲激光源被配置为以0.1至50kHz的脉冲重复率，从0.01至1.5ns的脉冲持续时间，在100至100之间的脉冲能量输出信号光的1.5-1.6信号波长的脉冲串 1000 uJ，在样品表面上有一个光斑，变化范围为1至60μm。 上述参数提供了至少20GW / cm 2的激光功率密度，足以产生高温高离子化等离子体（等离子体），其允许通过采用双电荷来测量碳钢中的碳浓度 离子线CIII，其检测限低至0.01％，其他元素通常存在于碳钢中，检测限低于0.01％。

公开(公告)号：WO2017062275A1

公开(公告)日：2017-04-13

申请号：PCT/US2016/054747

申请日：2016-09-30

Applicant: IPG PHOTONICS CORPORATION

Inventor： VASILYEV, Sergey ,  MOSKALEV, Igor ,  MIROV, Michael ,  GAPONTSEV, Valentin

IPC: H01S3/10 ,  G02F1/35 ,  H01S3/23

CPC classification number: G02F1/37 ,  G02F1/3551 ,  G02F1/39 ,  G02F2001/3528 ,  H01S3/0092 ,  H01S3/094076 ,  H01S3/10007 ,  H01S3/1095 ,  H01S3/11 ,  H01S3/1608 ,  H01S3/1623 ,  H01S3/1628 ,  H01S3/1643 ,  H01S3/2308

Abstract: Systems and methods for spectrally broadening seed pulses with a single pass laser amplifier are disclosed. A bulk TM:II-VI polycrystalline material with combined gain and nonlinear characteristic provides passive (cold) spectral broadening of high power seed pulses. Continuous pumping provides more significant spectral broadening. In particular, pulsed pumping of TM:II-VI polycrystalline material (e.g. Cr2+:ZnS, Cr2+:ZnSe, and Cr2+:CdSe) is shown to provide significant spectral broadening to the super continuum generation SCG level. Pulse picking, pump sources, master oscillators and various optical components are described.

Abstract translation: 公开了用单通道激光放大器对种子脉冲进行光谱加宽的系统和方法。 具有组合增益和非线性特性的大量TM：II-VI多晶材料提供高功率种子脉冲的无源（冷）光谱扩展。 连续泵送提供了更加显着的谱扩展。 特别地，显示TM：II-VI多晶材料（例如Cr2 +：ZnS，Cr2 +：ZnSe和Cr2 +：CdSe）的脉冲泵浦显示为超连续体生成SCG水平提供显着的谱扩展。 描述了脉冲采集，泵浦源，主振荡器和各种光学元件。

公开(公告)号：WO2015084854A1

公开(公告)日：2015-06-11

申请号：PCT/US2014/068172

申请日：2014-12-02

Applicant: IPG PHOTONICS CORPORATION

Inventor： GAPONTSEV, Valentin ,  FOMIN, Valentin ,  SCHERBAKOV, Eugene ,  OVTCHINNIKOV, Alex ,  FERIN, Anton ,  ABRAMOV, Andrey

IPC: H01S3/067

CPC classification number: H01S3/0675 ,  H01S3/094069 ,  H01S3/0941 ,  H01S3/1618

Abstract: The inventive laser is configured with a plurality of pigtailed multimode (MM) diode lasers each receiving a direct input current at a room temperature which is maintained to be within a 20-25° C inside the housing of the laser. The diode lasers each are configured to operate at a desired wavelength in an optimal operational range, in which the diode laser operates with a WPE range between 63% and 75%. The direct current inputted in each diode laser is selected to be below a threshold at an efficiency curve of the diode laser after which the efficiency of the diode laser starts decreasing while an output power of the diode laser continues to increase. The laser is further configured with a fiber gain block having an active fiber medium which is pumped with the cumulative pump output and operative to emit a laser output in a power range between hundreds of watts and tens and even hundreds of kilowatts at the desired wavelength in an optimal operation range. The optimal operational ranges of respective MM diode lasers and fiber gain block are matched to achieve a superposition of respective efficiency maximums providing an overall maximum system efficiency up to 55%.

Abstract translation: 本发明的激光器配置有多个尾纤多模（MM）二极管激光器，其每个都接收室温下的直接输入电流，该激光器保持在激光器壳体内的20-25℃内。 二极管激光器被配置为在最佳工作范围内以期望的波长工作，其中二极管激光器以63％至75％之间的WPE范围工作。 在二极管激光器的效率曲线下，输入到每个二极管激光器中的直流电流选择为低于阈值，之后二极管激光器的效率开始下降，同时二极管激光器的输出功率继续增加。 激光器进一步配置有具有有源光纤介质的光纤增益块，该有源光纤介质利用累积泵浦输出被泵浦，并且可操作以在所需波长的数百瓦特和几十千瓦之间的功率范围内发射激光输出 最佳操作范围。 匹配相应MM二极管激光器和光纤增益块的最佳工作范围，以实现各自效率最大值的叠加，从而提供高达55％的总体最大系统效率。

公开(公告)号：WO2014138399A1

公开(公告)日：2014-09-12

申请号：PCT/US2014/021206

申请日：2014-03-06

Applicant: IPG PHOTONICS CORPORATION

Inventor： FOMIN, Valentin ,  ABRAMOV, Mikhail ,  FERIN, Anton ,  SAMARTSEV, Igor ,  GAPONTSEV, Valentin

IPC: H01S3/067 ,  H01S3/098 ,  H01S3/10

CPC classification number: H01S3/06708 ,  H01S3/005 ,  H01S3/0407 ,  H01S3/067 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/094007 ,  H01S3/094019 ,  H01S3/094053 ,  H01S3/094069 ,  H01S3/09408 ,  H01S3/09415 ,  H01S3/10

Abstract: A high power fiber laser system includes a booster which is configured as a fiber amplifier extending over free space, pump source and laser head including a reflective element which receives pump light and. reflects toward the output end of the booster in a counter signal- propagating direction. The booster is configured with concentric and coextending frustoconically shaped multimode ("MM") core and cladding around the core. The core includes a mode transition region expanding between small diameter SM input and large diameter MM output core ends and configured so that amplification of high order modes is substantially suppressed as a single mode ("SM") signal light propagates from the input to output core ends. The laser head receives output, ends of respective pump light delivery fibers and signal fiber, respectively. The pump source is structured with a plurality of independent sub-pumps arranged around the booster. The laser head supports a segmented mirror configured to reflect pump lights from respective pump sub-sources to the output end of the booster in a counter propagating direction, wherein the booster is configured to emit the amplified signal light reaching up to MW power levels substantially in the SM.

Abstract translation: 高功率光纤激光器系统包括被配置为在自由空间上延伸的光纤放大器的升压器，泵浦源和包括接收泵浦光的反射元件的激光头。 在反向信号传播方向上向增强器的输出端反射。 增强器配置有同心和共同延伸的截头圆锥形多模（“MM”）芯和围绕芯的包层。 核心包括在小直径SM输入和大直径MM输出核心端之间扩展的模式转变区域，并且被配置为当单模（“SM”）信号光从输入到输出核心传播时基本上抑制高阶模式的放大 结束。 激光头分别接收输出，相应的泵浦光输送光纤和信号光纤的端部。 泵源结构具有围绕增压器布置的多个独立子泵。 激光头支撑分段反射镜，其配置成将来自相应泵子源的泵浦光以反向传播方向反射到升压器的输出端，其中，升压器被配置为发射达到MW功率水平的放大信号光， SM。

公开(公告)号：WO2013109902A1

公开(公告)日：2013-07-25

申请号：PCT/US2013/022161

申请日：2013-01-18

Applicant: IPG PHOTONICS CORPORATION ,  GAPONTSEV, Valentin ,  SAMARTSEV, Igor

Inventor： GAPONTSEV, Valentin ,  SAMARTSEV, Igor

IPC: H01S3/067

CPC classification number: H01S3/06708 ,  G02B6/14 ,  H01S3/06729 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/08045 ,  H01S3/094042 ,  H01S3/1611 ,  H01S3/1618 ,  H01S2301/03

Abstract: A high power fiber laser system emitting a substantially diffraction limited beam with a Gaussian intensity profile includes a single mode ("SM") neodymium fiber pump source outputting a SM pump light; a seed laser operative to emit a SM signal light at a wavelength greater than that of the pump light; a SM DWM receiving and multiplexing the SM pump and signal lights. The disclosed system further includes a booster fiber amplifier which is confiugred with a frustoconically-shaped ytterbium ("Yb") doped core receiving the pump and signal lights and configured with a small diameter input end which supports only a SM and a large diameter output end which is capable of supporting the SM and high order modes (:HOM"). The booster further has a cladding surrounding and coextending with the core, the core being configured for having intensity profiles of respective SMs of pump and signal lights overlap one another so that an overlap integral substantially equals to one (1) along an entire length of the core. The SM of the light signal extracts substantially the entire energy from the pump mode leaving the HOMs without amplification necessary to affect a quality of the diffraction limited beam of the system in a MW peak power range and hundreds of watt average power range.

Abstract translation: 发射具有高斯强度分布的基本衍射受限束的高功率光纤激光器系统包括输出SM泵浦光的单模（“SM”）钕光纤泵浦源; 种子激光器，其以大于泵浦光的波长发射SM信号光; SM DWM接收和复用SM泵和信号灯。 所公开的系统还包括一个增强光纤放大器，其与接收泵和信号灯的截头圆锥形镱（“Yb”）掺杂的核心配合，并配置有仅支持SM和大直径输出端的小直径输入端 其能够支持SM和高阶模式（：HOM“），该升压器还具有包围并与芯共同延伸的包层，所述芯被配置为具有泵和信号灯的各个SM的强度分布彼此重叠，因此 重叠积分基本上等于沿着芯的整个长度的一（1），光信号的SM从泵模式中提取基本上整个能量，留下HOM，而不需要影响衍射受限束质量的放大 该系统在MW峰值功率范围和数百瓦的平均功率范围内。

公开(公告)号：WO2011090649A2

公开(公告)日：2011-07-28

申请号：PCT/US2010/061328

申请日：2010-12-20

Applicant: IPG PHOTONICS CORPORATION ,  GAPONTSEV, Valentin ,  OVTCHINNIKOV, Alexander ,  KOMISSAROV, Alexey ,  TRUBENKO, Pavel

Inventor： GAPONTSEV, Valentin ,  OVTCHINNIKOV, Alexander ,  KOMISSAROV, Alexey ,  TRUBENKO, Pavel

CPC classification number: H01S5/2036 ,  H01S5/028 ,  H01S5/0425 ,  H01S5/1014 ,  H01S5/1064 ,  H01S2301/18

Abstract: A laser diode is configured with a substrate delimited by opposite AR and HR reflectors and a gain region. The gain region bridges the portions of the respective AR and HR reflectors and is configured with a main resonant cavity and at least one side resonant cavity. The main resonant cavity spans between the portions of the respective reflectors, and at least one additional resonant cavity extends adjacent to the main resonator cavity. The gain region is configured so that stimulated emission is generated only the main resonant cavity. Accordingly, the laser diode is operative to radiate a high-power output beam emitted through the portion of the AR reflector which is dimensioned to shape the output beam with the desired near-field.

Abstract translation: 激光二极管配置有由相对的AR和HR反射器限定的衬底和增益区域。 增益区域桥接相应AR和HR反射器的部分，并且配置有主谐振腔和至少一个侧共振腔。 主谐振腔跨越各个反射器的部分之间，并且至少一个额外的谐振腔相邻于主谐振腔延伸。 增益区域被配置为仅仅产生受激发射的主谐振腔。 因此，激光二极管可操作地辐射通过AR反射器的部分发射的大功率输出光束，其尺寸被设计成具有期望的近场的输出光束的形状。

公开(公告)号：WO2017062181A1

公开(公告)日：2017-04-13

申请号：PCT/US2016/053008

申请日：2016-09-22

Applicant: IPG PHOTONICS CORPORATION

Inventor： MOSKALEV, Igor ,  VASILYEV, Sergey ,  MIROV, Michael ,  GAPONTSEV, Valentin

IPC: H01S3/108

CPC classification number: H01S3/108 ,  G02F1/3511 ,  G02F1/3536 ,  G02F2001/3542 ,  G02F2203/26 ,  H01S3/0057 ,  H01S3/0813 ,  H01S3/094042 ,  H01S3/1095 ,  H01S3/1112 ,  H01S3/2308

Abstract: The present invention provides systems and methods for producing short laser pulses that are amplified and spectrally broadened in a bulk gain media. The bulk material, having laser gain and nonlinear properties, is concurrently exposed to an optical pump input and a seed input, the pump power being sufficient to amplify and spectrally broaden the seed pulse.

Abstract translation: 本发明提供用于产生在体增益介质中被放大和光谱扩展的短激光脉冲的系统和方法。 具有激光增益和非线性特性的本体材料同时暴露于光泵输入端和种子输入端，泵功率足以放大和扩频种子脉冲。

公开(公告)号：WO2013110091A1

公开(公告)日：2013-07-25

申请号：PCT/US2013/022602

申请日：2013-01-22

Applicant: IPG PHOTONICS CORPORATION ,  GAPONTSEV, Valentin ,  TARYTYSHNYY, Velentin ,  VERSHININ, Oleg ,  OULIANOV, Dmitri ,  DAVIDOV, Boris

Inventor： GAPONTSEV, Valentin ,  TARYTYSHNYY, Velentin ,  VERSHININ, Oleg ,  OULIANOV, Dmitri ,  DAVIDOV, Boris

IPC: H01S3/10

CPC classification number: G02F1/353 ,  G02F1/3534 ,  G02F2001/354

Abstract: A method for sum --frequency conversion of coherent radiation includes generating two linearly polarized waves which coliinearly propagate in respective first and second non- coinciding planes at different first and second frequencies f 1 ≠ f 2 , respectively. The waves are further guided through an active crystal which rotates the waves at different angles Ψ 1 and Ψ 2 determined as Ψ 1 = ρ(f 1 )⋅L Ψ 2 = ρ (f 2 )⋅L, where L is a length of the active crystal, and ρ(f 1 ) and ρ (f 2 ) specific rotations of respective frequencies f 1 ≠ f 2 . Finally the rotated waves are incident on a non-linear crystal configured to sum frequency the wave to generate a third harmonic.

Abstract translation: 相干辐射的和频转换的方法包括分别在不同的第一和第二频率f1

公开(公告)号：WO2013106456A1

公开(公告)日：2013-07-18

申请号：PCT/US2013/020866

申请日：2013-01-09

Applicant: IPG PHOTONICS CORPORATION ,  GAPONTSEV, Valentin ,  AVDOKHIN, Alexey ,  ANDRUSYAK, Oleksiy ,  GRAPOV, Yuri

Inventor： GAPONTSEV, Valentin ,  AVDOKHIN, Alexey ,  ANDRUSYAK, Oleksiy ,  GRAPOV, Yuri

IPC: H01S3/098 ,  H01S3/10

CPC classification number: H01S3/1301 ,  G02F1/353 ,  H01S3/0085 ,  H01S3/0092 ,  H01S3/06758 ,  H01S3/10015 ,  H01S3/109 ,  H01S3/1305 ,  H01S3/2308 ,  H01S5/0687

Abstract: A method for converting the optical frequency of a single-mode, single-frequency laser source includes generating a linearly-polarized single-frequency seed laser signal at a fundamental frequency; amplifying the seed laser signal in an optical amplifier; coupling the amplified signal into an external cavity formed by at least two mirrors, one of the mirrors being installed on a piezo actuator; enhancing the coupled signal inside the external cavity by locking a resonance frequency of the cavity to the frequency of the seed laser by continuously adjusting the optical length of the cavity with the piezo actuator; and converting the frequency of the enhanced signal using a non-linear crystal placed in a beam path inside the cavity. A method for converting the optical frequency of a single-mode, single-frequency laser source, includes generating a linearly polarized single-frequency seed laser signal at a fundamental frequency, the seed laser being a diode laser configured to adjust the frequency in response to controllable pump current variations; amplifying the seed laser signal in an optical amplifier; coupling the amplified signal into an external cavity formed by at least two mirrors; enhancing the coupled signal inside the external cavity by locking the frequency of the diode seed laser to a resonance frequency of the cavity by continuously adjusting the pump current of the diode seed laser; and converting the frequency of the enhanced signal using a non-linear crystal placed in a beam path inside the cavity.

Abstract translation: 用于转换单模单频激光源的光频率的方法包括：以基频产生线性偏振单频种子激光信号; 放大光放大器中的种子激光信号; 将放大的信号耦合到由至少两个反射镜形成的外部空腔中，一个反射镜安装在压电致动器上; 通过使用压电致动器连续调节空腔的光学长度，将腔的谐振频率锁定到种子激光的频率来增强外部腔内的耦合信号; 以及使用放置在腔内的光束路径中的非线性晶体来转换增强信号的频率。 一种用于转换单模单频激光源的光频率的方法包括：以基频产生线性偏振单频种子激光信号，种子激光器是被配置为响应于 可控泵电流变化; 放大光放大器中的种子激光信号; 将放大的信号耦合到由至少两个反射镜形成的外部空腔中; 通过连续调节二极管种子激光器的泵浦电流，将二极管种子激光器的频率锁定到腔体的谐振频率，从而增强外部腔体内的耦合信号; 以及使用放置在腔内的光束路径中的非线性晶体来转换增强信号的频率。