Efficient Second Harmonic Conversion of Broadband High-Peak-Power Nd:Glass Laser Radiation Using Large-Aperture KDP Crystals in Quadrature
NAVAL RESEARCH LAB WASHINGTON DC
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The second harmonic conversion efficiency broadband Nd glass Laser Light Delta nuc 30cm FWHM. Using two KDP crystals in a quadrature arrangement we obtained energy conversion efficiencies 55 with an initial bandwidth for the fundamental of Delta nuc about 17 cm FWHM. For these conditions, we observed a modest increase about 70 in the harmonic bandwidth FWHM relative to the fundamental. The usual theory of three wave mixing a dispersive birefringent nonlinear crystals is extended to described the broadband harmonic conversion process the generalized theory includes the statistical properties of the Light and phase mismatch effects on the spectral components in the complex field amplitudes. Good agreement is shown between the code calculations and the measurements. Keywords Full width at half maximum.
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