1,721,252 research outputs found
Generation of the fourth harmonic of a femtosecond Ti : sapphire laser
No full textA high-repetition-rate femtosecond laser system operating, for the first time to our knowledge, in the spectral region near 200 nn is described. Frequency quadrupling of a mode-locked Ti:sapphire laser results in maximum average powers of 6 mm (165-fs pulses) and 15 mW (340-fs pulses) at 82 MHz. The shortest wavelength achieved is 193.7 nm. (C) 1998 Optical Society of America OCIS codes: 190.2620, 190.7110, 320.7080, 320.111
Mercury thiogallate mid-infrared femtosecond optical parametric generator pumped at 1.25 mu m by a Cr : forsterite regenerative amplifier
No full textWe demonstrate a novel traveling-wave-type optical parametric generator based on 1.25-mu m pumping of HgGa2S4 that produces tunable, high-power, transform-limited proportional to 200-fs pulses in the mid-IR from 5 to 9 mu m. Output idler energies on the microjoule level are obtained with maximum conversion efficiency of 11% for the amplifier stage, which is more than two times better than the results obtained with an analogous sample of the widely spread material AgGaS2. (C) 2000 Optical Society of Americ
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