OPTICAL GUIDED-MODE RESONANCE FILTER
    11.
    发明申请
    OPTICAL GUIDED-MODE RESONANCE FILTER 审中-公开
    光学引导型谐振滤波器

    公开(公告)号:WO1993001510A1

    公开(公告)日:1993-01-21

    申请号:PCT/US1992005569

    申请日:1992-07-01

    Abstract: A guided-mode resonance filter is provided which can be used as an optical filter with very narrow line width and as an efficient optical switch. Diffraction efficiencies and passband frequencies are calculated based on guided-mode resonance properties of periodic dielectric structures in a waveguide geometry. The guided-mode resonance filter preferably includes means for changing various parameters within the grating (10) so as to change passband frequencies in response thereto. Also, the present invention envisions a narrowband tuneable laser having a diffraction grating of the present invention placed within a laser cavity to provide narrowband optical wave output from the narrowband tuneable laser. In another preferred embodiment, the present diffraction grating can be supported by a semiconductor substrate, preferably adjacent to a semiconductor laser for fine-tuning the output of the semiconductor laser. In still another preferred embodiment, the present diffraction grating can be placed between thin-film layers to enhance thin-film performance characteristics.

    MULTILAYER OPTICAL DIELECTRIC COATING
    13.
    发明申请
    MULTILAYER OPTICAL DIELECTRIC COATING 审中-公开
    多层光电介质涂层

    公开(公告)号:WO1990002964A1

    公开(公告)日:1990-03-22

    申请号:PCT/US1989003761

    申请日:1989-09-05

    CPC classification number: G02B5/285 G02B5/0833 G02B5/0883 G02B5/289

    Abstract: A highly damage resistant, multilayer, optical reflective coating (20) includes alternating layers (24, 26) of doped and undoped dielectric material. The doping levels are low enough that there are no distinct interfaces between the doped and undoped layers so that the coating has properties nearly identical to the undoped material. The coating is fabricated at high temperature with plasma-assisted chemical vapor deposition techniques to eliminate defects, reduce energy-absorption sites, and maintain proper chemical stoichiometry. A number of differently-doped layer pairs, each layer having a thickness equal to one-quarter of a predetermined wavelength in the material are combined to form a narrowband reflective coating (20) for a predetermined wavelength. Broadband reflectors (55) are made by using a number of narrowband reflectors, each covering a portion of the broadband.

    Abstract translation: 高度耐损伤的多层光反射涂层(20)包括掺杂和未掺杂的介电材料的交替层(24,26)。 掺杂水平足够低,使得掺杂层和未掺杂层之间没有明显的界面,使得涂层具有与未掺杂材料几乎相同的性质。 涂层采用等离子辅助化学气相沉积技术在高温下制造,以消除缺陷,减少能量吸收部位,保持适当的化学计量。 多个不同掺杂层对,每层具有等于材料中预定波长四分之一的厚度,以形成预定波长的窄带反射涂层(20)。 宽带反射器(55)通过使用多个窄带反射器制成,每个窄带反射器覆盖宽带的一部分。

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