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We report the realization and characterization of a spectrometer based on difference frequency generation using a periodically poled lithium niobate crystal. As signal and pump lasers we used a diode-pumped Nd-YAG laser (λ=1.064μm) and an extended cavity semiconductor diode laser (λ=0.785μm), respectively. The mid-infrared coherent radiation was produced at 3μm with a maximum power of about 160nW...
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