A terahertz source has been developed based on a hybrid of optical rectification and difference frequency generation. The optical pulse from a titanium:sapphire laser system is stretched and modulated using a spatial filtering technique to produce a several picosecond long pulse modulated at the terahertz frequency. A type II phase matched interaction is realized via angle tuning in a gallium selenide crystal. A liquid helium cooled silicon bolometer was used to establish a lower bound of 2 kW on the peak power observed at 1.1 THz. Tunability was demonstrated between 0.7 and 2.0 THz.


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    Title :

    Terahertz radiation from optical rectification of a modulated laser pulse


    Contributors:
    Gordon, D.F. (author) / Ting, A. (author) / Sprangle, P. (author) / Fischer, R. (author) / Kapetanakos, C.A. (author) / Zigler, A. (author)


    Publication date :

    2005-01-01


    Size :

    1006879 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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