Enhancement of harmonic generation by Fresnel-lensing effects

We present experimental results of enhanced second- and third-harmonic generation efficiency from Fresnel-lensing effects. We obtained enhancement by a factor of 6 in the third-harmonic yield by simply limiting the laser beam with an iris. Higher enhancement factors (up to 16) were obtained with a F...

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Bibliographic Details
Published in:Optics letters 2006-05, Vol.31 (9), p.1298-1300
Main Authors: CAVALIERI, Stefano, FINI, Lorenzo, SALI, Emiliano, BUFFA, Roberto
Format: Article
Language:English
Subjects:
Diffraction and scattering
Exact sciences and technology
Frequency conversion
harmonic generation, including high-order harmonic generation
Fundamental areas of phenomenology (including applications)
Nonlinear optics
Optics
Physics
Wave optics
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Summary:We present experimental results of enhanced second- and third-harmonic generation efficiency from Fresnel-lensing effects. We obtained enhancement by a factor of 6 in the third-harmonic yield by simply limiting the laser beam with an iris. Higher enhancement factors (up to 16) were obtained with a Fresnel zone plate. The experimental findings are in good agreement with the results of a simple theoretical analysis.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.31.001298