Abstract
Difference frequency mixing of two near-IR diode lasers is an attractive method for generation of coherent mid-IR radiation for molecular sensing applications. Mixing in bulk nonlinear crystals has been demonstrated with AgGaS2 and AgGaSe21 and with periodically poled lithium niobate (PPLN),2 but the theoretical bulk conversion efficiencies, near 0.01%/W, have limited single-pass continuous-wave mid-IR output powers to a few microwatts.
© 1996 Optical Society of America
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