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    DEVICE FOR AUTOMATICALLY SELECTING A BEAM MODE IN LASER PROCESSING MACHINE
    31.
    发明申请
    DEVICE FOR AUTOMATICALLY SELECTING A BEAM MODE IN LASER PROCESSING MACHINE 审中-公开
    用于在激光加工机中自动选择光束模式的装置

    公开(公告)号：US20070002908A1

    公开(公告)日：2007-01-04

    申请号：US11420294

    申请日：2006-05-25

    申请人： Tsunehiko Yamazaki ,  Naoomi Miyakawa

    发明人： Tsunehiko Yamazaki ,  Naoomi Miyakawa

    IPC分类号： H01S3/098

    CPC分类号： H01S3/106 ,  B23K26/064 ,  B23K26/0648 ,  B23K26/0665 ,  H01S3/034 ,  H01S3/0805

    摘要： A device for automatically selecting a beam mode by limiting an outer diameter size of a laser beam in a laser resonator of a laser processing machine is provided. A laser emitting device 100 emits a laser beam LB in a housing 110 to supply it through an output lens 130 to a processing torch 10. A device for automatically selecting a beam mode 200 is mounted in a direction which is perpendicular to a center axis of the laser beam LB, and has a diaphragm member 220 which is guided by a linear guide. A piston rod 244 is driven by a cylinder 240 mounted outside of a housing 210, and drives a permanent magnet 250 which has one polarity. A permanent magnet 230 which is mounted to the diaphragm member 220 and has the other polarity is driven in a noncontact manner, so that an openings 222 or 224 of the diaphragm member 220 is automatically selected.

    摘要翻译： 提供了一种通过限制激光加工机的激光谐振器中的激光束的外径尺寸来自动选择光束模式的装置。 激光发射装置100在壳体110中发射激光束LB，以将其通过输出透镜130提供给处理焊炬10.用于自动选择光束模式200的装置安装在垂直于 激光束LB，并且具有由线性引导件引导的隔膜构件220。 活塞杆244由安装在外壳210外侧的圆筒240驱动，并驱动具有一个极性的永磁体250。 安装到隔膜构件220并具有另一极性的永磁体230以非接触方式被驱动，从而自动选择隔膜构件220的开口222或224。

    Scalable laser with robust phase locking
    34.
    发明申请
    Scalable laser with robust phase locking 有权
    具有坚固相位锁定功能的可扩展激光器

    公开(公告)号：US20050169323A1

    公开(公告)日：2005-08-04

    申请号：US10771047

    申请日：2004-02-02

    申请人： Kalin Spariosu ,  Alexander Betin

    发明人： Kalin Spariosu ,  Alexander Betin

    IPC分类号： H01S3/067 ,  H01S3/23 ,  H01S3/10

    CPC分类号： H01S3/067 ,  H01S3/0675 ,  H01S3/08045 ,  H01S3/0805 ,  H01S3/09415 ,  H01S3/1608 ,  H01S3/1643 ,  H01S3/2383

    摘要： A robust scalable laser. The laser includes plural fiber laser resonators. A cavity that is external to the fiber laser resonators combines plural laser beams output from the plural fiber laser resonators into a single output laser beam. In a specific embodiment, the plural fiber laser resonators are eye-safe double-clad Er:YAG laser resonators that are pumped via laser diode arrays.

    摘要翻译： 强大的可扩展激光。 激光器包括多个光纤激光谐振器。 在光纤激光谐振器外部的空腔将从多个光纤激光谐振器输出的多个激光束组合成单个输出激光束。 在具体实施例中，多个光纤激光谐振器是通过激光二极管阵列泵浦的眼睛安全的双包层Er：YAG激光谐振器。

    Laser resonator
    35.
    发明授权
    Laser resonator 失效
    激光谐振器

    公开(公告)号：US06853670B2

    公开(公告)日：2005-02-08

    申请号：US10329471

    申请日：2002-12-27

    申请人： Takayuki Yanagisawa ,  Yoshihito Hirano

    发明人： Takayuki Yanagisawa ,  Yoshihito Hirano

    IPC分类号： H01S3/08

    CPC分类号： H01S3/08045 ,  H01S3/08 ,  H01S3/0805 ,  H01S3/08059 ,  H01S3/08072

    摘要： Heretofore, if the beam size of the resonance mode is made small in a long resonator length, there arises a problem that the operation of the laser resonator becomes easy to be unstable and hence the adjustment thereof becomes difficult. A laser resonance includes: a laser material; a telescope for magnifying a laser beam which has been made incident from the laser material and for reducing a laser beam which has been made incident from the side opposite thereto; a flat reflecting mirror for reflecting the laser beam which has been made incident from said telescope; a telescope for magnifying the laser beam which has been reflected by the flat reflecting mirror to be reduced by the telescope and to be amplified by the laser material to be made incident thereto; and a flat reflecting mirror for reflecting the laser beam which has been made incident from the telescope. The telescope having suitable magnification is selected for the resonator length, whereby the beam size of the resonance mode at the center of the resonator can be arbitrarily adjusted and the stable resonator which has the small beam size with the long resonator length can be constructed.

    摘要翻译： 迄今为止，如果谐振模式的光束尺寸在长的谐振器长度上变小，则出现激光谐振器的操作变得容易不稳定并因此难以进行调整的问题。 激光共振包括：激光材料; 用于放大从激光材料入射的激光束并用于减少从其相对侧入射的激光束的望远镜; 用于反射从所述望远镜入射的激光束的平面反射镜; 用于放大由平面反射镜反射的激光束的望远镜，由望远镜缩小并被要被入射的激光材料放大; 以及用于反射从望远镜入射的激光束的平面反射镜。 对于谐振器长度选择具有合适放大率的望远镜，由此可以任意调整谐振器中心处的谐振模式的波束尺寸，并且可以构造具有长谐振器长度的具有小波束尺寸的稳定谐振器。

    Optical resonators with discontinuous phase elements
    36.
    发明授权
    Optical resonators with discontinuous phase elements 失效
    具有不连续相元件的光谐振器

    公开(公告)号：US06813286B1

    公开(公告)日：2004-11-02

    申请号：US09403472

    申请日：2001-01-05

    申请人： Yochay Danziger ,  Asher A. Friesem ,  Ram Oron

    发明人： Yochay Danziger ,  Asher A. Friesem ,  Ram Oron

    IPC分类号： H01S310

    CPC分类号： H01S3/0804 ,  H01S3/0805 ,  H01S3/08068 ,  H01S3/08072 ,  H01S3/083 ,  H01S2301/20

    摘要： A discontinuous phase element (86, 204) is disposed between the reflector (20, 23) elements of an optical resonator in order to suppress unwanted modes propagating within the cavity, and to preferentially allow the existence of preferred modes within the cavity. The discontinuous phase element (204) operates by producing sharp changes in the phase distribution of the undesirable modes, so that their propagation losses are sufficiently high prevent their build-up. This is achieved by introducing a discontinuous phase change to these modes at locations where they have high intensity. At the same time, the desired modes suffer 0 or 2&pgr; phase change, or have low intensity at the discontinuity, and so are unaffected by the discontinuous phase element. Such elements can be used in a single element or a double element configuration, and can be used in passive cavities or active cavities, such as lasers. In addition to being able to improve the output beam quality of a laser by encouraging output of the lowest order mode beam, they can also be used to improve the maximum power output of solid state lasers by encouraging the output of specific higher order mode beams, without limiting dynamic range of the laser. They can also be used to compensate for birefringence distortion in the gain medium.

    摘要翻译： 在光谐振器的反射器（20,23）元件之间设置不连续相位元件（86,204），以便抑制在空腔内传播的不想要的模式，并且优先地允许腔内存在优选模式。 不连续相元件（204）通过产生不期望的模式的相位分布的急剧变化来操作，使得它们的传播损耗足够高防止它们的积聚。 这是通过在它们具有高强度的位置处对这些模式引入不连续相变来实现的。 同时，期望的模式遭受0或2pi相位变化，或者在不连续处具有低强度，因此不受不连续相位元件的影响。 这种元件可以用于单个元件或双元件配置中，并且可以用于无源腔或主动空腔，例如激光器。 除了通过鼓励输出最低阶模式光束能够提高激光器的输出光束质量之外，还可以通过鼓励特定高阶模式光束的输出来改善固态激光器的最大功率输出， 而不限制激光的动态范围。 它们也可用于补偿增益介质中的双折射失真。

    Resonating cavity system for broadly tunable multi-wavelength semiconductor lasers
    37.
    发明授权
    Resonating cavity system for broadly tunable multi-wavelength semiconductor lasers 有权
    用于广泛可调多波长半导体激光器的谐振腔系统

    公开(公告)号：US06687275B2

    公开(公告)日：2004-02-03

    申请号：US10249748

    申请日：2003-05-05

    申请人： Ching-Fuh Lin

    发明人： Ching-Fuh Lin

    IPC分类号： H01S316

    CPC分类号： H01S5/1032 ,  H01S3/0805 ,  H01S3/08059 ,  H01S5/005 ,  H01S5/101 ,  H01S5/1092 ,  H01S5/141

    摘要： A resonating cavity system of a tunable multi-wavelength semiconductor laser. The system has a laser, a collimating lens, a grating, a slit plate, and adjustable mirrors. The laser has two ends. The first end is coupled to the cavity, and the second end outputs the laser beam. The grating is located in the lasing path between the first end of the semiconductor laser and the plate, and the plate is located before the adjustable mirrors. Each adjustable mirror is aligned to the corresponding slit of the plate. Lasing paths extend from the first end of the laser, through the grating, the lens, a plurality of the slits of the plate, to the adjustable mirrors. Each mirror can be adjusted independently to ensure each beam is reflected accurately back to each resonating path. Thereby, a feature of equal lasing gains of all the resonating paths is guaranteed.

    摘要翻译： 可调多波长半导体激光器的谐振腔系统。 该系统具有激光，准直透镜，光栅，狭缝板和可调镜。 激光有两端。 第一端耦合到空腔，第二端输出激光束。 光栅位于半导体激光器的第一端和板之间的激光通路中，并且板位于可调镜之前。 每个可调节的镜子与板的相应的狭缝对齐。 激光路径从激光器的第一端，通过光栅，透镜，板的多个狭缝延伸到可调镜。 每个镜子可以独立调节，以确保每个光束被精确地反射回每个谐振路径。 因此，保证所有谐振路径具有相等激光增益的特征。

    Laser resonator
    38.
    发明申请
    Laser resonator 失效
    激光谐振器

    公开(公告)号：US20030202554A1

    公开(公告)日：2003-10-30

    申请号：US10329471

    申请日：2002-12-27

    发明人： Takayuki Yanagisawa ,  Yoshihito Hirano

    IPC分类号： H01S003/091 ,  H01S003/092 ,  H01S003/08

    CPC分类号： H01S3/08045 ,  H01S3/08 ,  H01S3/0805 ,  H01S3/08059 ,  H01S3/08072

    摘要： Heretofore, if the beam size of the resonance mode is made small in a long resonator length, there arises a problem that the operation of the laser resonator becomes easy to be unstable and hence the adjustment thereof becomes difficult. A laser resonance includes: a laser material; a telescope for magnifying a laser beam which has been made incident from the laser material and for reducing a laser beam which has been made incident from the side opposite thereto; a flat reflecting mirror for reflecting the laser beam which has been made incident from said telescope; a telescope for magnifying the laser beam which has been reflected by the flat reflecting mirror to be reduced by the telescope and to be amplified by the laser material to be made incident thereto; and a flat reflecting mirror for reflecting the laser beam which has been made incident from the telescope. The telescope having suitable magnification is selected for the resonator length, whereby the beam size of the resonance mode at the center of the resonator can be arbitrarily adjusted and the stable resonator which has the small beam size with the long resonator length can be constructed.

    摘要翻译： 迄今为止，如果谐振模式的光束尺寸在长的谐振器长度上变小，则出现激光谐振器的操作变得容易不稳定并因此难以进行调整的问题。 激光共振包括：激光材料; 用于放大从激光材料入射的激光束并用于减少从其相对侧入射的激光束的望远镜; 用于反射从所述望远镜入射的激光束的平面反射镜; 用于放大由平面反射镜反射的激光束的望远镜，由望远镜缩小并被要被入射的激光材料放大; 以及用于反射从望远镜入射的激光束的平面反射镜。 对于谐振器长度选择具有合适放大率的望远镜，由此可以任意调整谐振器中心处的谐振模式的波束尺寸，并且可以构造具有长谐振器长度的具有小波束尺寸的稳定谐振器。

    Laser saturable absorber and passive negative feedback elements, and method of producing energy output therefrom
    39.
    发明授权
    Laser saturable absorber and passive negative feedback elements, and method of producing energy output therefrom 有权
    激光可饱和吸收器和被动负反馈元件，以及从其产生能量输出的方法

    公开(公告)号：US06546027B1

    公开(公告)日：2003-04-08

    申请号：US09452661

    申请日：1999-12-01

    申请人： Dzhakhangir V. Khaydarov

    发明人： Dzhakhangir V. Khaydarov

    IPC分类号： H01S311

    CPC分类号： H01S3/1118 ,  H01S3/08004 ,  H01S3/08022 ,  H01S3/0805 ,  H01S3/1061 ,  H01S3/1103 ,  H01S3/1109

    摘要： The present invention is directed to a pulsed, mode-locked, picosecond laser having a solid-state laser medium, a saturable absorber (SA), and a passive negative feedback (PNF) element. The SA is “slow”, having an absorption recovery time which is longer than a desired duration of an output pulse. The SA and the PNF element together mode-lock the laser to produce an output pulse or pulses of the desired duration. Thus, according to the method of the invention, the solid-state laser medium is energized, whereupon the laser becomes mode-locked to produce the desired output pulses. The solid-state laser of the present invention is capable of producing very short, energetic output pulses, such as output pulses having a duration on the order of one or more picoseconds, and an energy of from about 100 &mgr;J to about 2 mJ. These output pulses are very stable. As the laser is of relatively simple construction, it is relatively easy to operate to produce this stable energy output.

    摘要翻译： 本发明涉及具有固体激光介质，可饱和吸收体（SA）和无源负反馈（PNF）元件的脉冲式锁模皮秒激光器。 SA是“慢”的，其吸收恢复时间长于输出脉冲的期望持续时间。 SA和PNF元件一起模式锁定激光器以产生所需持续时间的输出脉冲或脉冲。 因此，根据本发明的方法，固态激光介质被激励，于是激光器被锁模以产生期望的输出脉冲。 本发明的固体激光器能够产生非常短的能量输出脉冲，例如具有大约一个或多个皮秒的持续时间的输出脉冲，以及从约100μJ到约2mJ的能量。 这些输出脉冲非常稳定。 由于激光器的结构相对简单，所以操作起来比较容易，以产生稳定的能量输出。

    Narrow band excimer or molecular fluorine laser having an output coupling interferometer
    40.
    发明申请
    Narrow band excimer or molecular fluorine laser having an output coupling interferometer 失效

    公开(公告)号：US20020122452A1

    公开(公告)日：2002-09-05

    申请号：US10098258

    申请日：2002-03-15

    申请人： Lambda Physik AG.,

    发明人： Juergen Kleinschmidt ,  Peter Lokai

    IPC分类号： H01S003/22 ,  H01S003/223

    CPC分类号： H01S3/08068 ,  H01S3/0805 ,  H01S3/105 ,  H01S3/225

    摘要： An excimer or molecular fluorine laser includes a discharge chamber filled with a gas mixture, multiple electrodes within the discharge chamber connected to a power supply circuit for energizing the gas mixture, and a resonator including the discharge chamber and a pair of resonator reflectors for generating an output laser beam. One of the resonator reflectors is an output coupling interferometer including a pair of opposing reflecting surfaces tuned to produce a reflectivity maximum at a selected wavelength for narrowing a linewidth of the output laser beam. One of the pair of opposing reflecting surfaces is configured such that the opposing reflecting surfaces of the interferometer have a varying optical distance therebetween over an incident beam cross-section which serves to suppress outer portions of the reflectivity maximum to reduce spectral purity. Preferably, this surface is non-planar, and may include a step, a recess or a raised or recessed curved portion of a quarter wavelength in height or depth, respectively.