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    Low timing jitter, single frequency, polarized laser
    34.
    发明公开
    Low timing jitter, single frequency, polarized laser 审中-公开
    Polarisierter Einzelfrequenz-Laser mit geringer Zeitsteuerungsschwankung

    公开(公告)号：EP2463971A2

    公开(公告)日：2012-06-13

    申请号：EP11183955.1

    申请日：2011-10-05

    申请人： Raytheon Company

    发明人： Sotelo, Juan C. ,  Stultz, Robert D. ,  Filgas, David

    IPC分类号： H01S3/106 ,  H01S3/094 ,  H01S3/10 ,  H01S3/0941 ,  H01S3/113 ,  H01S3/16

    CPC分类号： H01S3/10061 ,  H01S3/0612 ,  H01S3/08009 ,  H01S3/094053 ,  H01S3/094076 ,  H01S3/09415 ,  H01S3/1061 ,  H01S3/113 ,  H01S3/1618 ,  H01S3/1643 ,  Y10T29/49826

    摘要： A laser system includes a first laser diode (110) configured to generate first light in a first direction along an optical path; a laser resonator (130) having a gain medium (131), anisotropic saturable absorber (134), and a wavelength selective outcoupler (140) positioned in the optical path upon which the first light impinges a first side thereof for pulsed pumping of the gain medium (131), a second laser diode (170) configured to generate second light in a second direction along the optical path toward a second side of the resonator, passing through the wavelength selective outcoupler (140) unimpeded and being absorbed by the saturable absorber element (134), wherein the second light has a polarization corresponding to the orientation of the saturable absorber (134); the wavelength selective outcoupler (140) being configured to only allow third light of a predetermined wavelength to have feedback in the laser resonator, achieve gain in the resonator, and be emitted from the laser resonator. Via the second light the polarization of the laser light is controlled and timing jitter is reduced.

    摘要翻译： 激光系统包括：第一激光二极管（110），被配置为沿着光路在第一方向上产生第一光; 具有增益介质（131），各向异性可饱和吸收器（134）的激光谐振器（130）和位于所述光路中的波长选择性输出耦合器（140），所述第一光入射到所述光路中，用于脉冲泵浦所述增益 介质（131），第二激光二极管（170），被配置为沿着所述光路朝向所述谐振器的第二侧沿第二方向产生第二光，穿过所述波长选择性输出耦合器（140）而不受阻碍并被所述可饱和吸收体吸收 元件（134），其中所述第二光具有对应于所述可饱和吸收体（134）的取向的极化; 波长选择性输出耦合器（140）被配置为仅允许预定波长的第三光在激光谐振器中具有反馈，实现谐振器中的增益，并从激光谐振器发射。 通过第二个光，可以控制激光的偏振，并减少定时抖动。

    RESONATOR WITH INTRACAVITY TRANSFORMATION OF A GAUSSIAN INTO A TOP-HAT BEAM
    35.
    发明公开
    RESONATOR WITH INTRACAVITY TRANSFORMATION OF A GAUSSIAN INTO A TOP-HAT BEAM 审中-公开
    成筒HAT RAY高斯光束谐振器腔内转型

    公开(公告)号：EP2425505A1

    公开(公告)日：2012-03-07

    申请号：EP10720032.1

    申请日：2010-04-29

    申请人： CSIR

    发明人： LITVIN, Ihar, Anatolievich ,  FORBES, Andrew

    IPC分类号： H01S3/08 ,  H01S3/106

    CPC分类号： H01S3/08045 ,  H01S3/08 ,  H01S3/106 ,  H01S2301/206

    摘要： The invention relates to an optical resonator, laser apparatus and a method of generating a laser beam inside an optical resonator. The optical resonator (100) includes an optical cavity (102) and an optical element (104.1, 104.2) at either end thereof, operable to sustain a light beam (108) therein, characterized in that each optical element (104.1, 104.2) is a phase-only optical element operable to alter a mode of the beam (108) as it propagates along the length of the optical resonator (100), such that in use the beam (108) at one end of the optical resonator (100) has a Gaussian profile while the beam (108) at the other end of the optical resonator (100) has a non-Gaussian profile.

    Solid-state laser device
    36.
    发明公开
    Solid-state laser device 审中-公开
    Festkörperlaservorrichtung

    公开(公告)号：EP2387117A2

    公开(公告)日：2011-11-16

    申请号：EP11162972.1

    申请日：2011-04-19

    申请人： Fujifilm Corporation

    发明人： Yamazoe, Shogo

    IPC分类号： H01S3/08 ,  H01S3/0941 ,  H01S3/106 ,  H01S3/11

    CPC分类号： H01S3/0805 ,  H01S3/0401 ,  H01S3/0405 ,  H01S3/042 ,  H01S3/08045 ,  H01S3/09415 ,  H01S3/106 ,  H01S3/1118 ,  H01S3/1618 ,  H01S3/1675 ,  H01S2301/02

    摘要： There is provided a solid-state laser device (10) including: a resonator; a solid-state laser medium (18) disposed in the resonator; an excitation section that irradiates an excitation beam into the solid-state laser medium (18); a mode selector (26) that controls transverse modes of oscillating light in the resonator; and a movement section (28) that moves the mode selector (26) along the resonator optical axis direction (Z).
    The laser may be mode-locked with a SESAM (12) and the laser medium may be Yb: KYW. The transverse mode selector may be a knife edge (26) which is translated with the help of a holder (28) resulting in a single transverse mode emission of the laser.

    摘要翻译： 提供了一种固体激光装置（10），包括：谐振器; 设置在谐振器中的固态激光介质（18）; 激励部，其将激发光束照射到所述固态激光介质中; 模式选择器（26），其控制谐振器中的振荡光的横向模式; 以及使模式选择器（26）沿着谐振器光轴方向（Z）移动的移动部（28）。 激光可以用SESAM（12）锁模，激光介质可以是Yb：KYW。 横模式选择器可以是在保持器（28）的帮助下平移的刀刃（26），导致激光器的单一横向模式发射。

    EXTERNAL CAVITY TUNABLE LASER WITH AN AIR GAP ETALON COMPRISING WEDGES
    37.
    发明公开
    EXTERNAL CAVITY TUNABLE LASER WITH AN AIR GAP ETALON COMPRISING WEDGES 有权
    可调谐外腔式激光器和气柱管WITH TALON KEILEN

    公开(公告)号：EP2235579A1

    公开(公告)日：2010-10-06

    申请号：EP08865429.8

    申请日：2008-12-22

    申请人： Renishaw PLC

    发明人： COPNER, Nigel ,  EL DAH DAH, Nayla

    IPC分类号： G02B26/00 ,  H01S3/106 ,  H01S5/14 ,  H01S3/08

    CPC分类号： H01S3/1062 ,  G02B26/001 ,  H01S3/08036 ,  H01S5/141

    摘要： A tunable narrow linewidth laser is provided, wherein an adjustable etalon structure (20) is employed to simultaneously tune the wavelength of the laser transmission and the length of the laser cavity. The etalon structure (20) is an effective, relatively thick shear plate comprised of transparent matched wedge-shaped substrates (24a, 24b) and a pair of parallel, partially transmissive mirrors (22a, 22b) with a space therebetween. Rotation of the etalon structure (20) relative to the laser input changes the angle of incidence to the first substrate (24a) and the etalon angle, thereby changing the wavelength of the laser light and also changing the length of the external laser cavity. Thus, reliable frequency tuning is achieved, without mode hopping. The invention is defined in terms of the more general concept that mode hopping during frequency tuning can be eliminated by changing the wavelength and the length of the laser cavity simultaneously by selectively altering the angle of incidence of the laser input on a wavelength discriminating structure, such as an etalon structure, positioned within the optical path of a laser system.

    SOURCE LASER COMPACTE A FAIBLE LARGEUR SPECTRALE
    38.
    发明公开
    SOURCE LASER COMPACTE A FAIBLE LARGEUR SPECTRALE 有权
    具有减少的频谱宽度激光镭源

    公开(公告)号：EP2143181A1

    公开(公告)日：2010-01-13

    申请号：EP08736560.7

    申请日：2008-04-24

    申请人： Thales ,  Centre National d'Etudes Spatiales ,  Observatoire de Paris

    发明人： HOLLEVILLE, David ,  PERRIN, Stéphanie ,  DIMARCQ, Noël ,  ESNAULT, François-Xavier

    IPC分类号： H01S3/106

    CPC分类号： H01S5/141

    摘要： The invention relates to a laser source with an external cavity generating a useful laser beam (Fu), that comprises at least one laser diode DL (10) mounted in an extended optical cavity (30, 82) defined between two reflecting surfaces (92, 48) forming an optical path for a laser beam Fd generated by the laser diode DL, a mode selection filter (44, 86) in the optical path of the cavity for selecting a resonance mode from a range of resonance modes of the laser beam in the cavity. The extended cavity (2) includes in the optical path thereof an optical device (94) including a polariser (100) that is 100 % permissive to a rectilinear polarisation of the beam Fd generated by the laser diode, the reference polarisation angle ϑ0 being of 0 degrees, a polarisation rotator (102) of the beam at the output of the polariser (Fc1 ) by a predetermined rotation angle ϑ-1, a polarisation separator (04) of the beam (Frt) at the output of the polarisation rotator, the polarisation separator being inclined in the cavity so that its transmission axis (tt') is oriented at an angle (-ϑ-1) having an opposite sign to and the same value as the polarisation angle of the beam (Frt) at the output of the rotator (102), wherein the optical device prevents any feedback of a reflection beam (Freturn) of the useful beam (Fu) towards said laser diode DL. The invention can be used in a laser for cooling atoms, in interferometry experiments, inertial sensors and atomic clocks.

    WAVELENGTH SCANNING LIGHT SOURCE AND OPTICAL COHERENCE TOMOGRAPHY DEVICE
    39.
    发明公开
    WAVELENGTH SCANNING LIGHT SOURCE AND OPTICAL COHERENCE TOMOGRAPHY DEVICE 审中-公开
    WENENLÄNGEN-RASTERLICHTQUELLE UND OPTISCHEKOHÄRENZTOMOGRAPHIEEINRICHTUNG

    公开(公告)号：EP2136443A1

    公开(公告)日：2009-12-23

    申请号：EP07806624.8

    申请日：2007-09-03

    申请人： Optical Comb, Inc.

    发明人： KOUROGI, Motonobu ,  IMAI, Kazuhiro

    IPC分类号： H01S3/106 ,  A61B10/00 ,  G01N21/17 ,  G02F2/02 ,  H01S3/06

    CPC分类号： G01N21/4795 ,  A61B5/0066 ,  A61B5/0073 ,  G02F1/0311 ,  G02F1/0322 ,  G02F2001/213 ,  H01S3/06791 ,  H01S3/08054 ,  H01S3/0813 ,  H01S3/082 ,  H01S3/1062 ,  H01S3/107 ,  H01S3/1305

    摘要： An optical coherence tomography device includes a wavelength scanning laser light source (10) provided with two Fabry-Perot resonators (13A, 13B) provided in a light path for laser oscillation. The values of FSR (free spectral range) of the Fabry-Perot resonators are set so as to be proximate to each other. The resonator length of at least one of the two Fabry-Perot resonators is periodically varied within a preset range to cause the two Fabry-Perot resonators (13A, 13B) to operate as a wavelength length varying filter of a narrow pass band capable of varying the selection wavelength by the vernier effect to output laser light that has wavelength temporally scanned. The optical coherence tomography device also includes an interference optical system (20) that causes the laser light output from the wavelength scanning laser light source (10) to be branched into light for reference and light for observation to be illuminated on an object for observation (60) and that generates interference light of reflected light of the light for observation illuminated on the object for observation (60) and the light for reference. The optical coherence tomography device further includes a signal processing means (50) that receives the interference light obtained from the interference optical system (20) for transforming the received interference light into an electrical signal to calculate the optical tomographic image information of the object for observation (60).

    摘要翻译： 光学相干断层摄影装置包括设置有用于激光振荡的光路中的两个法布里 - 珀罗谐振器（13A，13B）的波长扫描激光光源（10）。 法布里 - 珀罗谐振器的FSR（自由光谱范围）的值被设置为彼此接近。 两个法布里 - 珀罗谐振器中的至少一个的谐振器长度在预设范围内周期性地变化，以使两个法布里 - 珀罗谐振器（13A，13B）作为能够变化的窄通带的波长长度变化滤波器 选择波长由游标效应输出，其具有波长时间扫描的激光。 光学相干断层摄影装置还包括干涉光学系统（20），其使得从波长扫描激光光源（10）输出的激光被分支为参考光和用于观察的光被照射在观察对象上 60），并且产生用于观察的光的反射光的干涉光（60）和用于参考的光。 光学相干断层摄影装置还包括信号处理装置（50），其接收从干涉光学系统（20）获得的干涉光，用于将接收到的干涉光变换为电信号，以计算观察对象的光学断层图像信息 （60）。