Summary form only given. Mid-infrared laser absorption spectroscopy is a promising technique for environmental trace-gas detection because many important air contaminants have strong absorption bands in that spectral region. To access the 3-5 /spl mu/m spectral region a convenient technique is difference frequency mixing in a nonlinear material, which allows the frequency shifting of readily available near infrared diode laser sources. Periodically poled LiNbO/sub 3/ (PPLN) has desirable characteristics for such difference frequency mixing, including engineerable phase matching and a high nonlinear coefficient (d/sub eff/). The use of a tapered waveguide written onto the PPLN, leads to a further enhancement of the conversion efficiency of PPLN.


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    Title :

    Trace gas spectroscopy using a periodically poled LiNbO/sub 3/ waveguide based mid-infrared difference frequency sensor


    Contributors:


    Publication date :

    1999-01-01


    Size :

    292557 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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