FILTRE OPTIQUE A RESEAUX RESONNANTS INSENSIBLE A LA POLARISATION ACCORDABLE EN FONCTION DE L'ANGLE D'INCIDENCE
    1.
    发明公开

    公开(公告)号:EP2661649A1

    公开(公告)日:2013-11-13

    申请号:EP12700018.0

    申请日:2012-01-03

    IPC分类号: G02B5/20 G02B5/28

    摘要: The invention relates to a polarization-insensitive optical filter centered on a wavelength (λ0) measured in vacuum, comprising: first and second waveguides (21, 21') each having a propagation mode; a first grating (11) formed in or on the surface of the first waveguide (21), the first grating being periodical at least along a first axis Ox defining a first orthonormal base Oxyz; a second grating (11') formed in or on the surface of the second waveguide (21), the second grating being periodical at least along a second axis Oxy' defining a second orthonormal base Ox'y'z; wherein the first and second gratings are provided above each other and are such that the first axis Ox and the second axis Ox' define an angle ξ different from ± π /2 radians so that, when the first grating is illuminated by a light beam, the first and second propagation modes are excited and have orthogonal fields for a predetermined angle of incidence of the light beam.

    摘要翻译: 本发明涉及以在真空中测量的波长为中心的偏振不敏感光学滤波器,包括:具有传播模式的第一和第二波导; 形成在第一波导的表面中或其上的第一光栅,第一光栅至少沿着限定第一正交基极Oxyz的第一轴线Ox周期化; 形成在所述第二波导的表面中或所述第二波导表面上的第二光栅,所述第二光栅至少沿着限定第二正交基底Ox'y'z的第二轴Ox'周期化; 其中所述第一和第二光栅设置在另一个之上,并且使得所述第一轴线Ox和所述第二轴线Ox'限定角度&xgr; 不同于±&pgr / /弧度,使得当第一光栅被光束照射时,传播模式被激发并具有用于光束入射角的正交场。