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    MICROFABRICATED BLAZED GRATING, DEVICES IN WHICH SUCH A GRATING IS EMPLOYED AND FABRICATION PROCESS
    44.
    发明公开
    MICROFABRICATED BLAZED GRATING, DEVICES IN WHICH SUCH A GRATING IS EMPLOYED AND FABRICATION PROCESS 有权
    与微电网MADE WITH BLAZE区域模式无裂纹LASER

    公开(公告)号：EP1994433A1

    公开(公告)日：2008-11-26

    申请号：EP07718159.2

    申请日：2007-01-22

    Applicant: CSEM Centre Suisse d'Electronique et de Microtechnique SA

    Inventor： STANLEY, Ross ,  TORMEN, Maurizio ,  KUNZ, Rino ,  NIEDERMANN, Philippe

    IPC: G02B5/18 ,  G02B26/08 ,  H01S5/14 ,  H01S5/065

    CPC classification number: G01J3/1804 ,  G02B5/1828 ,  G02B26/0808 ,  H01S5/141

    Abstract: A blazed grating, in particular of the microfabricated type, is disclosed as well as mode hop-free tunable lasers in which this grating is employed, and a process for fabricating gratings of this type. The grating lies in a general plane and comprises a plurality of elongate beams carrying mutually parallel respective reflection surfaces spaced apart from one another with a predefined pitch, each of these reflection surfaces having a normal direction inclined at a grating angle α to the normal direction of the general plane. Furthermore, the grating comprises a plurality of resilient suspension arms connected to the beams and intended to be fastened to a grating support. The suspension arms, the beams and their respective reflection surfaces define an assembly formed from a single part. A first pair of comb electrodes is provided for applying a mechanical force to this assembly, these being placed on a first side of the grating, along an axis transverse to the beams, and designed so as to allow the pitch of the grating to be modified in response to the application of the mechanical force. A second pair of electrodes placed on the opposite side from the first allows, in combination with the first pair, application of a displacement of the assembly, possibly without deforming it. It is thus possible to modulate the wavelength and/or the phase of a light beam with a device that is simple and inexpensive to fabricate and has a small footprint.

    Compact catadioptric spectrometer
    46.
    发明公开
    Compact catadioptric spectrometer 审中-公开
    Kompaktes katadioptrisches Spektrometer

    公开(公告)号：EP1882916A1

    公开(公告)日：2008-01-30

    申请号：EP06015122.2

    申请日：2006-07-20

    Applicant: Interuniversitair Microelektronica Centrum ,  Universiteit Gent

    Inventor： Bockstaele, Ronny ,  Luyssaert, Bert ,  Naessens, Kris

    IPC: G01J3/18 ,  G01J3/02

    CPC classification number: G01J3/1804 ,  G01J3/02 ,  G01J3/0205 ,  G01J3/0208 ,  G01J3/0256 ,  G01J3/0264 ,  G01J3/0294 ,  G01J3/18

    Abstract: An optical characterisation system is described for characterising optical material. The system typically comprises a diffractive element (104), a detector (106) and an optical element (102). The optical element (102) thereby typically is adapted for receiving an illumination beam, which may be an illumination response of the material. The optical element (102) typically has a refractive surface for refractively collimating the illumination beam on the diffractive element (104) and a reflective surface for reflecting the diffracted illumination beam on the detector (106). The optical element (102) furthermore is adapted for cooperating with the diffractive element (104) and the detector (106) being positioned at a same side of the optical element (102).

    Abstract translation: 描述了用于表征光学材料的光学表征系统。 该系统通常包括衍射元件（104），检测器（106）和光学元件（102）。 因此，光学元件（102）通常适于接收可以是材料的照明响应的照明光束。 光学元件（102）通常具有用于折射准直衍射元件（104）上的照明光束的折射表面和用于将衍射照射光束反射在检测器（106）上的反射表面。 光学元件（102）还适于与衍射元件（104）和检测器（106）配合，位于光学元件（102）的同一侧。

    Monochrometer and wavelength division multiplexer comprising said monochrometer
    50.
    发明公开
    Monochrometer and wavelength division multiplexer comprising said monochrometer 审中-公开
    单色器和多色器件Wellenlängenmultiplexer

    公开(公告)号：EP1209453A2

    公开(公告)日：2002-05-29

    申请号：EP01309396.8

    申请日：2001-11-06

    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

    Inventor： Tokomaru, Terutaka ,  Takano, Toshihiko

    IPC: G01J3/18 ,  G02B27/44 ,  H04J14/02

    CPC classification number: G02B6/2931 ,  G01J3/1804 ,  G02B6/2938 ,  H04J14/02

    Abstract: A small-sized and low-cost wavelength division multiplexer having little insertion loss, little polarization dependence and a broad wavelength bandwidth,
       the wavelength division multiplexer adopting a grating configuration in which an incident light is retroreflected, exit lights from respective grooves are enhanced by interference effect in the incident direction of the light, wave surfaces of evanescent waves in the grooves are parallel to the normal direction of the grating and phases of the evanescent waves in the respective grooves agree with each other.
    The wavelength division multiplexer has high diffraction efficiency in each of TM and TE polarized lights at a several-order diffraction order and accordingly has a broad wavelength bandwidth and remarkably low polarization dependence.

    Abstract translation: 采用入射光回射的光栅配置的波分复用器，具有很小的插入损耗，极小的相关性和宽波长带宽的小型和低成本的波分多路复用器，通过干扰增强了来自相应凹槽的出射光 在光的入射方向上，凹槽中的ev逝波的波面平行于光栅的法线方向，并且相应凹槽中的ev逝波的相位彼此一致。 波长分割多路复用器在TM级和TE偏振光的每一个中以几级衍射级具有高的衍射效率，因此具有宽的波长带宽和极低的极化依赖性。

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