Generation of high-power femtosecond light pulses at 1 kHz in the mid-infrared spectral range between 3 and 12 mu m by second-order nonlinear processes in optical crystals

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We review methods for frequency conversion of amplified femtosecond laser pulses from the near- to the mid-infrared. The potential of all commercially available optical crystals is evaluated on the basis of the specific requirements in the high-power femtosecond regime. A comparative experimental study of a number of materials (birefringent and quasi-phase-matched) employed in a seeded optical parametric amplifier pumped near 800 nm is presented, where the generated idler is tunable between 3 and 4 mum. Internal conversion efficiencies as high as 40% and pulse energies as high as 20 muJ are achieved in this spectral range. Wavelength tunability up to 12 mum with energies exceeding 1 muJ is demonstrated by pumping optical parametric amplifiers and generators near 1.25 and 2 mum, as well as by difference frequency generation with a quantum efficiency of 40-80%. In all cases the generated mid-infrared pulses are almost bandwidth limited with a duration of 100-200 fs
Publisher
IOP PUBLISHING LTD
Issue Date
2001-05
Language
English
Article Type
Review
Keywords

DIFFERENCE-FREQUENCY-GENERATION; PERIODICALLY-POLED RBTIOASO4; PHASE-MATCHING PROPERTIES; PARAMETRIC AMPLIFICATION; REPETITION-RATE; LITHIUM-NIOBATE; 2ND-HARMONIC GENERATION; SELLMEIER COEFFICIENTS; POTASSIUM NIOBATE; ZNGEP2

Citation

JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS, v.3, no.3, pp.R1 - R19

ISSN
1464-4258
DOI
10.1088/1464-4258/3/3/201
URI
http://hdl.handle.net/10203/212788
Appears in Collection
PH-Journal Papers(저널논문)
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