Abstract
Tangential phase-matching has been employed for efficient generation of infrared radiation tunable from 2743 nm to 3362 nm by difference frequency mixing of Nd: YAG harmonic (532 nm) radiation and the same pumped dye (DCM) laser in a beta barium borate crystal. Wide acceptance over 532 nm beam has been utilised to obtain conversion efficiency in DFG as high as 20 times than our earlier reported value.
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