Abstract
Efficient tunable near-infrared radiation (NIR) () has been generated by temperature-tuned non-critical phase-matched (NCPM) difference-frequency mixing of Nd:YAG and tunable dye laser radiation (560 - 710 nm) in a 5 mm LBO crystal. Energy conversion efficiency of 11% at 1.54 has been achieved. A large angular and spectral bandwidth is observed. Temperature-tuned type-II non-collinear phase-matching has also been reported. Comparison with other NIR-generating crystals shows that temperature-tuned NCPM in LBO is superior to other methods.
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