We present experimental observations and corresponding numerical simulations illustrating the difference-frequency generation of mid-infrared radiation using few-cycle near-infrared-to-visible pulses, which yields conversion efficiencies above 12% in beta-barium borate crystal. Type I and type II phase-matching are shown to yield qualitatively different intensity-scaling behavior, with the former showing higher overall efficiency, especially with the addition of a zero-order wave plate for modifying the polarization state of the pulse, and the latter having a better stability of the spectrum versus input intensity.
Efficient, octave-spanning difference-frequency generation using few-cycle pulses in simple collinear geometry
Hanieh Fattahi,
Alexander Schwarz,
Sabine Keiber,
Nicholas Karpowicz
Optics Letters
38
(20)
4216-4219
(2013)
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In-Vitro Thermal Study of Different Tips in Various Operating Modes of the Sina Phacoemulsification System
