Microsecond pulse trains with pulse duration < 1 ps are generated by a Nd:glass
laser oscillator with 15 Hz repetition rate. Application of these pulses to non-cw
synchronous pumping of a dye laser yields intense pulses of 25 fs. Subsequent
nonlinear frequency conversion provides femtosecond pulses tunable over the visible
spectral range. The pulsed approach is compared with cw modelocking techniques.
Alfred Laubereau,
Peter Heinz,
and R. Gagel
"Generation of intense subpicosecond and femtosecond pulses using non-cw laser systems", Proc. SPIE 1268, Applications of Ultrashort Laser Pulses in Science and Technology, (1 August 1990); doi: 10.1117/12.20321; https://doi.org/10.1117/12.20321
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Alfred Laubereau, Peter Heinz, R. Gagel, "Generation of intense subpicosecond and femtosecond pulses using non-cw laser systems," Proc. SPIE 1268, Applications of Ultrashort Laser Pulses in Science and Technology, (1 August 1990);