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    EXCIMER LASER COMBINATION CAVITY
    5.
    发明公开
    EXCIMER LASER COMBINATION CAVITY 审中-公开
    准分子激光，KOMBINATIONSRESONATOR

    公开(公告)号：EP2937954A4

    公开(公告)日：2016-09-07

    申请号：EP12890192

    申请日：2012-12-20

    Applicant: ACADEMY OPTO ELECTRONICS CAS

    Inventor： ZHOU YI ,  SHAN YAOYING ,  FAN YUANYUAN ,  SONG XINGLIANG ,  ZHANG LIJIA ,  CUI HUIRONG ,  WANG YU

    IPC: H01S3/08 ,  H01S3/10

    CPC classification number: H01S3/08004 ,  H01S3/08 ,  H01S3/08009 ,  H01S3/08036 ,  H01S3/082 ,  H01S3/10 ,  H01S3/225

    Abstract: Disclosed is an excimer laser composite cavity, comprising a laser discharge cavity, a laser output module, a line-width narrowing module, and a laser amplification module. The laser discharge cavity contains work gas for generating laser when it is activated by an excitation source. The laser discharge cavity, the laser output module, and the line-width narrowing module constitute a line-width narrowing cavity configured to narrow down a line-width of the laser generated by the work gas. The laser discharge cavity, the laser output module, and the laser amplification module constitute an amplification cavity configured to amplify power of the laser with the line-width having been narrowed down by the line-width narrowing cavity.

    TWO-DIMENSIONAL PHOTONIC CRYSTAL SURFACE-EMITTING LASER
    6.
    发明公开
    TWO-DIMENSIONAL PHOTONIC CRYSTAL SURFACE-EMITTING LASER 审中-公开
    WITH SURFACE光子晶体的二维发光激光

    公开(公告)号：EP2966737A4

    公开(公告)日：2016-04-27

    申请号：EP14760954

    申请日：2014-02-25

    Applicant: JAPAN SCIENCE & TECH AGENCY

    Inventor： NODA SUSUMU ,  OKINO TSUYOSHI ,  KITAMURA KYOKO ,  TANAKA YOSHINORI ,  LIANG YONG

    IPC: H01S5/18 ,  H01S5/042 ,  H01S5/10 ,  H01S5/12 ,  H01S5/20

    CPC classification number: H01S5/18 ,  H01S3/0085 ,  H01S3/10 ,  H01S5/0425 ,  H01S5/105 ,  H01S5/1215 ,  H01S2301/18

    Abstract: The present invention provides a two-dimensional photonic crystal surface emitting laser that can emit an inclined beam at a larger inclination angle with a smaller loss in light. Provided is a two-dimensional photonic crystal surface emitting laser comprising a laminated structure including: a two-dimensional photonic crystal (2DPC) layer 11 in which refractive index distribution is formed by two-dimensionally arranging air holes 111 in a plate-shaped base member 114; and an active layer 12 for generating light having a wavelength » L by receiving an injection of an electric current, the two-dimensional photonic crystal surface emitting laser emitting a laser beam in the direction of an inclination angle ¸ from the normal to the 2DPC layer 11, wherein the air holes 111 in the 2DPC layer 11 are modulated at respective lattice points of a basic two-dimensional lattice whose periodicity is determined such that a resonant state of the light having the wavelength » L is created by forming a two-dimensional standing wave while the light is prevented from being emitted to the outside, and a phase ¨ of the modulation is expressed as ¨=r†‘·G'†‘ by using a position vector r†‘ of each lattice point and a reciprocal lattice vector G'†‘=(g' x , g' y )=(k x ±|k†‘|(sin¸ cosÕ)/n eff , k y ±|k†‘|(sin¸ sinÕ)/n eff ), the reciprocal lattice vector G'†‘ being expressed by using: a wave vector k†‘=(k x , k y ) of the light having the wavelength » L in the 2DPC layer 11; an effective refractive index n eff of the 2DPC layer 11; and an azimuthal angle Õ from a predetermined reference line of the basic two-dimensional lattice.

    Atomic oscillator, method of detecting coherent population trapping resonance and magnetic sensor
    8.
    发明公开
    Atomic oscillator, method of detecting coherent population trapping resonance and magnetic sensor 审中-公开
    用于检测与相干制备原子和磁传感器的谐振原子振荡器方法

    公开(公告)号：EP2767876A2

    公开(公告)日：2014-08-20

    申请号：EP14154882.6

    申请日：2014-02-12

    Applicant: Ricoh Company Ltd. ,  Tokyo Metropolitan University

    Inventor： Yano, Yuichiro ,  Goka, Shigeyoshi

    IPC: G04F5/14 ,  G01R33/20

    CPC classification number: H03L7/26 ,  G01R33/26 ,  G04F5/145 ,  H01S3/10 ,  H03B17/00

    Abstract: An atomic oscillator includes an alkali metal cell encapsulating an alkali metal atom; a light source that emits laser light; a light detector that detects light which has passed through the alkali metal cell; and a polarizer arranged between the alkali metal cell and the light detector. A modulation frequency in the light source is controlled, according to a coherent population trapping resonance which is a light absorption characteristic of a quantum interference effect for two kinds of resonant lights, by modulating the light source to generate sidebands and injecting laser lights with the sidebands into the alkali metal cell. A magnetic field is applied on the alkali metal cell in a direction parallel to a propagating direction of the laser light, and the laser light entering the alkali metal cell has a linear polarization, which is not parallel to a polarization direction of the polarizer.

    Abstract translation: 原子振荡器包括在碱金属原子的碱金属电池密封; 光源没有发射激光; 一个光检测器确实已通过碱金属细胞通过检测光; 和偏振器的碱金属单元和光检测器之间设置。 在光源的调制频率被控制，雅丁到一个相干布居俘获共振所有这对于2种谐振光的量子干涉效应的光吸收特性，通过与边带调制光源以产生边带和注射激光灯 入的碱金属单元。 磁场被施加在平行于所述激光的传播方向的方向上的碱金属电池，并进入碱金属电池中的激光光具有线性偏振，所有这些不平行于偏振器的偏振方向。

    SYSTEM FOR DRIVING PULSED LASER DIODE PUMP
    9.
    发明公开
    SYSTEM FOR DRIVING PULSED LASER DIODE PUMP 审中-公开
    驱动系统，脉冲激光二极管泵浦

    公开(公告)号：EP2678905A1

    公开(公告)日：2014-01-01

    申请号：EP11857921.8

    申请日：2011-02-03

    Applicant: IPG Photonics Corporation

    Inventor： GUSKOV, Sergey

    IPC: H01S3/091 ,  H01S5/06

    CPC classification number: H01S3/10 ,  H01S3/094076 ,  H01S5/0428 ,  H01S5/4018 ,  H03K3/53

    Abstract: A power supply for laser systems is configured with a DC power source having an output source voltage, an energy accumulator operatively connected to the output of the DC power source, and a pump. Coupled between the accumulator and source is a first DC to DC switched-mode power converter operative to charge the accumulator with voltage which may be same or different from the source voltage. The power supply further includes a second DC to DC switched-mode power converter coupled between the accumulator and pump and operative to discharge accumulator to the same or different, output voltage. The DC to DC converter are configured so that current pulses at the input of the pump each have a peak value greater than the power source current.

    ALLEVIATION OF LASER-INDUCED DAMAGE IN OPTICAL MATERIALS BY SUPPRESSION OF TRANSIENT COLOR CENTERS FORMATION AND CONTROL OF PHONON POPULATION
    10.
    发明公开
    ALLEVIATION OF LASER-INDUCED DAMAGE IN OPTICAL MATERIALS BY SUPPRESSION OF TRANSIENT COLOR CENTERS FORMATION AND CONTROL OF PHONON POPULATION 审中-公开
    利用激光救济带来了光学材料用过渡中心的形成和颜色的伤害减少用于控制声子群

    公开(公告)号：EP2522056A4

    公开(公告)日：2013-09-25

    申请号：EP11732035

    申请日：2011-01-03

    Applicant: KLA TENCOR CORP

    Inventor： DRIBINSKI VLADIMIR ,  CHUANG YUNG-HO ALEX

    IPC: H01S3/10 ,  H01S3/113

    CPC classification number: H01S3/10 ,  G02F1/3525 ,  H01S3/005 ,  H01S3/091

    Abstract: Laser-induced damage in an optical material can be mitigated by creating conditions at which light absorption is minimized. Specifically, electrons populating defect energy levels of a band gap in an optical material can be promoted to the conduction band—a process commonly referred to as bleaching. Such bleaching can be accomplished using a predetermined wavelength that ensures minimum energy deposition into the material, ideally promoting electron to just inside the conduction band. In some cases phonon (i.e. thermal) excitation can also be used to achieve higher depopulation rates. In one embodiment, a bleaching light beam having a wavelength longer than that of the laser beam can be combined with the laser beam to depopulate the defect energy levels in the band gap. The bleaching light beam can be propagated in the same direction or intersect the laser beam.

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