Summary form only given. The main features of vibrational SRS in hydrogen and deuterium pumped by laser pulses between 1.5-2 /spl mu/m are low nonlinearity and high diffraction losses caused by a large Stokes wavelength equal to 3-12 /spl mu/m. This process is complicated by competition with SBS and backward rotational SRS, and optical breakdown at high intensity can be a significant problem. All these above factors lead to a multifold increase of the SRS threshold. As a result, the conversion efficiency of a repetitively pulsed pump mid-IR system of moderate pulse energy of a dozen millijoules is very low. To increase the efficiency and obtain conditions under which the SRS in deuterium and hydrogen can provide a real coherent source suitable for many applications, we propose to excite a phonon grating using two auxiliary "booster" pumps. The difference in frequencies of these pulses must coincide with the Raman frequency of the gas used.


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    Titel :

    Highly efficient frequency conversion of near-IR pulses into mid-IR range via boosted vibrational SRS in hydrogen and deuterium


    Beteiligte:
    Matveyev, A.Z. (Autor:in) / Pasmanik, G.A. (Autor:in) / Peterson, D. (Autor:in)


    Erscheinungsdatum :

    1999-01-01


    Format / Umfang :

    300362 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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