Efficient high energy OPO's employing LiNbO/sub 3/ or KTP crystals pumped by conventional Nd:YAG laser have been demonstrated in the range of 1-5 /spl mu/m. To extend the source beyond 5 /spl mu/m range an additional nonlinear step may be employed to generate difference-frequency of the two waves (signal and idler) obtained from an OPO. The difference frequency mixing is most easily done in nonlinear crystals such as AgGaSe/sub 2/ and AgGaS/sub 2/ which phase match over 3-18 /spl mu/m and 1-12 /spl mu/m range respectively. OPO output beam divergence and spectral linewidth should be very narrow for efficient difference-frequency mixing in a nonlinear crystal. An injection-seeded OPO with unstable resonator can have such properties.


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    Titel :

    Efficient difference frequency generation (DFG) employing injection-seeded optical parametric oscillator (OPO)


    Beteiligte:
    Haidar, S. (Autor:in) / Ito, W. (Autor:in)


    Erscheinungsdatum :

    01.01.1999


    Format / Umfang :

    194115 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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