Photo-induced index gratings can be recorded in photorefractive crystals. These gratings can be employed for applications in optical memory and spectral filters. It is known that the photo-induced index gratings in photorefractive media are not exactly sinusoidal, even though the optical intensity is sinusoidal. In other words, higher harmonic index gratings exist. We propose and demonstrate a novel double exposure scheme which removes the fundamental component and all higher odd-orders of the index grating. As a result, a volume index grating is obtained with a grating period of /spl Lambda//2, where /spl Lambda/ is the fundamental period.


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    Titel :

    High harmonic photo-induced gratings in photorefractive media


    Beteiligte:
    Pochi Yeh (Autor:in) / Xiaonong Shen (Autor:in) / Ruibo Wang (Autor:in) / Jianhua Zhao (Autor:in) / Xianmin Yi (Autor:in)


    Erscheinungsdatum :

    01.01.1998


    Format / Umfang :

    159700 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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