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    WRITING OF PHOTO-INDUCED STRUCTURES
    1.
    发明公开
    WRITING OF PHOTO-INDUCED STRUCTURES 审中-公开
    SCHREIBEN VON LICHTINDUZIERTEN STRUKTUREN

    公开(公告)号：EP1540393A4

    公开(公告)日：2005-10-12

    申请号：EP03735149

    申请日：2003-06-27

    Applicant: AUSTRALIAN PHOTONICS PTY LTD ,  UNIV SYDNEY

    Inventor： SCEATS MARK ,  STEPANOV DMITRII YU

    IPC: G03F7/004 ,  G02B5/18 ,  G02B6/02 ,  G02B6/122 ,  G02B6/124 ,  G02B6/13 ,  G03F7/20 ,  G11B7/00 ,  G11B7/0065

    CPC classification number: B82Y20/00 ,  G02B6/1225 ,  G02B6/124 ,  G02B6/13 ,  G03F7/70408 ,  G11B7/00

    Abstract: A method of writing a photo-induced structure into a photosensitive material substrate, the method comprising the steps of creating an interference pattern utilising at least two light beams, exposing the substrate to the interference pattern for photo-inducing material changes in the substrate, and creating an irregularity in the interference pattern by controlling a wavefront of at least one of the beams, for creating a functional defect in the photo-induced structure.

    Abstract translation: 一种将感光结构写入光敏材料基片的方法，该方法包括以下步骤：利用至少两个光束产生干涉图案，将该基片暴露于干涉图案，用于在基片中感光材料变化，以及 通过控制至少一个光束的波前而在干涉图案中产生不规则性，用于在光致结构中产生功能缺陷。

    POLYMER OPTICAL WAVEGUIDE
    2.
    发明公开
    POLYMER OPTICAL WAVEGUIDE 有权
    光学纤维聚合物

    公开(公告)号：EP1320774A4

    公开(公告)日：2005-04-06

    申请号：EP01951247

    申请日：2001-07-20

    Applicant: UNIV SYDNEY

    Inventor： FLEMING SIMON ,  BASSETT IAN ,  SCEATS MARK ,  VAN EIJKELENBORG MARTIJN

    IPC: G02B6/00 ,  G02B6/02 ,  G02B6/032 ,  G02B6/16

    CPC classification number: G02B6/02347 ,  G02B6/02 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/02371

    Abstract: An optical waveguide in the form of an optical fibre (10) having at least one longitudinally extending light guiding core region (11) composed at least in part of a polymeric material, a longitudinally extending core-surrounding region (12) composed of a polymeric material, and a plurality of light confining elements (15), such as, for example, channel-like holes, located within the core surrounding region. The light confining elements extend in the longitudinal direction of the core region and are distributed about the core region, and at least a majority of the light confining elements having a refractive index less than that of the polymeric material from which the core-surrounding region is composed. A preform for use in manufacture of the optical waveguide is also disclosed.

    CONTROLLED PHASE DELAY BETWEEN BEAMS FOR WRITING BRAGG GRATINGS
    3.
    发明公开
    CONTROLLED PHASE DELAY BETWEEN BEAMS FOR WRITING BRAGG GRATINGS 有权
    可控间相位差个光波布拉格电网的信

    公开(公告)号：EP1082627A4

    公开(公告)日：2002-03-13

    申请号：EP99924590

    申请日：1999-05-28

    Applicant: UNIV SYDNEY

    Inventor： STEPANOV DMITRII ,  SCEATS MARK

    IPC: G02B5/18 ,  G02B6/02 ,  G02B6/10 ,  G02B5/28

    CPC classification number: G02B6/02152 ,  G02B5/1857 ,  G02B6/02133 ,  G02B6/02138 ,  G02B2006/02157 ,  G03H1/0476 ,  G03H2001/0482 ,  Y10S430/146

    Abstract: At least two beams of light form an interference pattern (39) for writing a grating structure on a photosensitive waveguide (38), where the interference pattern (39) is controlled by modulating the relative phase of the beams. The modulation may be via an electro-optic, magneto-optic, or acousto-optic phase modulator (34), or via a mechanically driven phase modulator (34) comprising a wedge, waveplate or phase mask. In the latter case the phase mask can also act as a beamsplitter (33) for forming the beams. Extended gratings can be written by moving the waveguide (38) while controlling the relative phase shift, and can comprise chirped, apodized and arbitratry grating profiles. Noise can be reduced via an optoelectronic feedback loop. In one embodiment the relative phase is modulated via an electro-optic modulator (32) acting on a polarized beam, which is then split into two beams by a polarisation beamsplitter (33) such that one beam passes through a half-wave plate (34), to form interference pattern (39).

    AN IMPROVED GRATING WRITING SYSTEM
    4.
    发明公开
    AN IMPROVED GRATING WRITING SYSTEM 审中-公开
    改进格书写系统

    公开(公告)号：EP1090316A4

    公开(公告)日：2005-09-28

    申请号：EP99924577

    申请日：1999-05-26

    Applicant: UNIV SYDNEY

    Inventor： POLADIAN LEON ,  SCEATS MARK

    IPC: G02B5/18 ,  G02B6/02 ,  G02B5/20

    CPC classification number: G02B6/02138 ,  G02B5/1857 ,  G02B6/02133

    Abstract: A method of forming a complete grating structure on a photosensitive waveguide is disclosed comprising the steps of: (a) writing an initial portion of the grating structure on the waveguide; (b) testing the properties of the initial portion to determine a series of parameters of the initial portion; (c) utilizing the parameters to alter the characteristics of a subsequently written portion of the grating structure to provide for an improved form of grating structure; (d) iterating the steps (a) to (c) so as to form the complete grating structure. The writing can be performed utilizing a coherence pattern formed from the interference of two coherent beams on the waveguide. The characteristics can include the intensity or phase of the subsequently written portion. The testing may include determining the spectral reflectance response of the initial portion or determining the spectral phase delay of the initial portion.

    OPTICAL GRATING
    7.
    发明公开
    OPTICAL GRATING 失效
    光晶格中

    公开(公告)号：EP0749587A4

    公开(公告)日：1997-06-04

    申请号：EP95908832

    申请日：1995-02-14

    Applicant: UNIV SYDNEY

    Inventor： CANNING JOHN ,  SCEATS MARK

    IPC: G02B6/13 ,  G02B5/18 ,  G02B6/02 ,  G02B6/10 ,  G02B27/44 ,  G02B6/18

    CPC classification number: G02B6/02152 ,  G02B6/02085 ,  G02B6/02133 ,  G02B6/02138 ,  G02B6/02185 ,  Y10S430/146

    Abstract: An optical grating is formed by exposing linearly spaced regions of an optical fibre (10), typically a germanosilicate core fibre, to UV irradiation to produce spaced apart regions (12 and 13) of differing refractive index within the core (11) of the fibre. The grating characteristics are modified to create a relatively complex structure, for example a ( PI phase-shifted distributed phase structure, by post-processing the grating. This is achieved by exposing at least one concomitant region (14) of the grating to localised UV irradiation.

    8.
    发明专利
    未知

    公开(公告)号：DE69906282T2

    公开(公告)日：2004-02-05

    申请号：DE69906282

    申请日：1999-05-28

    Applicant: UNIV SYDNEY

    Inventor： STEPANOV DMITRII ,  SCEATS MARK

    IPC: G02B5/18 ,  G02B6/02 ,  G02B6/10 ,  G02B5/28

    Abstract: A method of writing a grating structure with at least one of predetermined amplitude, period and phase properties in a photosensitive waveguide, the method comprising providing at least two light beams which overlap in an overlap region to form an interference pattern; moving the photosensitive waveguide through the overlap region; and modulating the phase of at least one of the light beams relative to the phase of the other light beams using a non-mechanical beam modulator so that the interference pattern appears to move through the overlap region, the apparent movement being variably controlled in response to the movement of the photosensitive waveguide such that a grating structure is written with the at least one of predetermined amplitude, period and phase properties. The apparent movement of the interference pattern may be variably controlled to match the movement of the waveguide, or to be deliberately detuned. The grating structure may be chirped or apodized.

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