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196 条记录 (耗时 0.017 秒)

    OSCILLATEUR PARAMETRIQUE OPTIQUE AVEC RETOUR DE POMPE A MAINTIEN DE PHASE ACHROMATIQUE.
    162.
    发明公开
    OSCILLATEUR PARAMETRIQUE OPTIQUE AVEC RETOUR DE POMPE A MAINTIEN DE PHASE ACHROMATIQUE. 有权
    OPTISCHER PARAMETRISCHER OSZILLATOR MIT ACHROMATISCHEM PHASENAUFRECHTERHALTENDEMPUMPENRÜCKWEG

    公开(公告)号：EP2035890A1

    公开(公告)日：2009-03-18

    申请号：EP07730308.9

    申请日：2007-06-27

    申请人： ONERA (Office National d'Etudes et de Recherches Aérospatiales)

    发明人： LEFEBVRE, Michel ,  MOHAMED, Ajmal ,  GODARD, Antoine

    IPC分类号： G02F1/39

    CPC分类号： G02F1/39 ,  G02F2001/3548 ,  G02F2201/17 ,  G02F2201/34 ,  G02F2203/04

    摘要： The invention applies to doubly resonant optical parametric oscillators comprising a non-linear crystal (4) through which pass a pump laser beam (fp), a signal beam (fs), and a complementary beam (fc), and a device (5) that totally or partially reflects said beams emanating from the crystal such that, after reflection, they generate between them a relative phase-shifting value ΔΦar for a given functioning mode independent of the signal frequency or complementary frequency, and is characterized in that the reflecting device (5) is a metallic mirror, or a combination of two scattering mirrors and a multilayer dielectric mirror placed downstream.

    摘要翻译： 本发明适用于包括通过泵激光束（fp），信号光束（fs）和互补光束（fc）的非线性晶体（4）和装置（5）的双谐振光学参量振荡器， 其完全或部分地反射从晶体发出的所述光束，使得在反射之后，它们在它们之间产生与信号频率或互补频率无关的给定功能模式的相对移相值＆Dgr;Φar，其特征在于， 反射装置（5）是金属副镜，或两个散射镜和放置在下游的多层电介质镜的组合。

    Optical multilayer disk, multiwavelength light source, and optical system using them
    165.
    发明公开
    Optical multilayer disk, multiwavelength light source, and optical system using them 审中-公开
    光学多层盘，多波长光源以及使用它们的光学系统

    公开(公告)号：EP1602968A3

    公开(公告)日：2006-11-22

    申请号：EP05018442.3

    申请日：2000-10-24

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Mizuuchi, Kiminori ,  Yamamoto, Kazuhisa ,  Kojima, Rie ,  Yamada, Noboru

    IPC分类号： G02F1/377 ,  G02F1/35 ,  G11B7/24 ,  G02B6/10 ,  G11B7/125 ,  G11B7/135 ,  G11B7/0045 ,  G11B7/005

    CPC分类号： G11B7/243 ,  G02B6/126 ,  G02B6/29362 ,  G02B2006/12164 ,  G02F1/3532 ,  G02F1/3544 ,  G02F1/3775 ,  G02F2001/3548 ,  G02F2201/18 ,  G02F2203/58 ,  G11B7/00454 ,  G11B7/005 ,  G11B7/124 ,  G11B7/1275 ,  G11B7/1395 ,  G11B7/24038 ,  G11B7/259 ,  G11B7/26 ,  G11B2007/0013 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316

    摘要： When a wavelength of a first laser beam with which a first recording medium including a first recording layer is recorded and reproduced is indicated as λ1 (nm), a wavelength of a second laser beam with which a second recording medium including a second recording layer is recorded and reproduced as λ2 (nm), the relationship between the wavelength λ1 and the wavelength λ2 is set to be expressed by 10 ≦ |λ1 - λ2| ≦ 120. The first recording layer has a light absorptance ratio of at least 1.0 with respect to the wavelength λ1. The light transmittance of the first recording medium with respect to the wavelength λ2 is set to be at least 30 in both the cases where the recording layer is in a crystal state and in an amorphous state. In order to record and reproduce the optical multilayer disk with the above-mentioned characteristics, a multiwavelength light source with the following configuration is used. Wavelengths of fundamental waves with different wavelengths from injection parts (64-1,64-2) formed at one end of a plurality of optical waveguides (62-1,62-2), which satisfy phase matching conditions different from one another and are formed in the vicinity of the surface of a substrate (61), are converted simultaneously, and the first and second laser beams are emitted from emission parts (66) formed at substantially the same position at the other end of the optical waveguides. This enables an optimum optical system for high density recording and reproduction to be obtained.

    摘要翻译： 当包括第一记录层的第一记录介质被记录和再现的第一激光束的波长表示为λ1（nm）时，包括第二记录层的第二记录介质所用的第二激光束的波长为 记录并再现为λ2（nm）时，波长λ1和波长λ2之间的关系被设置为由10≤|λ1-λ2| ≤120。第一记录层相对于波长λ1具有至少1.0的光吸收率比。 在记录层处于结晶状态和非结晶状态的情况下，第一记录介质相对于波长λ2的透光率被设定为至少30。 为了记录和再现具有上述特性的光学多层盘，使用具有以下配置的多波长光源。 在多个光波导（62-1,62-2）的一端形成的满足相互不同的相位匹配条件的注入部分（64-1,64-2）的波长不同的基波的波长为 形成在基板61的表面附近的第一和第二激光束同时被转换，并且第一和第二激光束从在光波导的另一端处的基本相同位置处形成的发射部分66发射。 这使得能够获得用于高密度记录和再现的最佳光学系统。

    OPTICAL PARAMETRIC OSCILLATOR WITH MONOLITHIC DUAL PPLN ELEMENTS WITH INTRINSIC MIRRORS
    169.
    发明公开
    OPTICAL PARAMETRIC OSCILLATOR WITH MONOLITHIC DUAL PPLN ELEMENTS WITH INTRINSIC MIRRORS 审中-公开
    和单片两级PPLN光参量振荡器具有内在MIRROR

    公开(公告)号：EP1068557A4

    公开(公告)日：2005-04-27

    申请号：EP99912318

    申请日：1999-02-23

    申请人： NORTHROP GRUMMAN CORP

    发明人： MEYER RONALD K JR ,  MARABLE MICHAEL L ,  GRIFFITH GERALD P

    IPC分类号： G02F1/35 ,  G02F1/39

    CPC分类号： G02F1/39 ,  G02F2001/3542 ,  G02F2001/3548 ,  G02F2201/15 ,  G02F2202/07

    摘要： The present invention relates generally to an apparatus that increases the conversion efficiency of optical parametric oscillators and also reduces overall system size and susceptibility to vibration. The first embodiment of the present invention incorporates a PPLN OPO architecture (20) which includes mirrored coatings (32, 36) on the entry surface area (22) and exit surface area (24) of a monolithic nonlinear optical medium (26). The coatings (32, 36) act as mirrors, however, the mirrors are actually affixed to the PPLN element (28, 30). In the first embodiment of the present invention, the PPLN element (26) is a dual grated element. The second embodiment of the present invention uses a single grated PPLN element.