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Appl Phys B (2011) 105:697702 DOI 10.1007/s00340-011-4591-3

Summary: Appl Phys B (2011) 105:697702
DOI 10.1007/s00340-011-4591-3
Adiabatic frequency conversion of ultrafast pulses
H. Suchowski B.D. Bruner A. Ganany-Padowicz
I. Juwiler A. Arie Y. Silberberg
Received: 25 January 2011 / Revised version: 12 April 2011 / Published online: 3 June 2011
Springer-Verlag 2011
Abstract A new method for efficient, broadband sum and
difference frequency generation of ultrafast pulses is demon-
strated. The principles of the method follow from an anal-
ogy between frequency conversion and coherent optical ex-
citation of a two-level system. For conversion of ultra-
fast pulses, the concepts of adiabatic conversion are devel-
oped further in order to account for dispersion and group
velocity mismatch. The scheme was implemented using
aperiodically poled nonlinear crystals and a single step
nonlinear mixing process, leading to conversion of near-
IR (790 nm) ultrafast pulses into the blue (450 nm)
and mid-IR (3.15 m) spectral regions. Conversion band-
widths up to 15 THz FWHM and efficiencies up to 50% are


Source: Arie, Ady - Department of Electrical Engineering-Physical Electronics, Tel Aviv University


Collections: Engineering