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Blue 489-nm picosecond pulses generated by intracavity frequency doubling in a passively mode-locked optically pumped semiconductor disk laser
O. Casel1, D. Woll1, M.A. Tremont1, H. Fuchs1, R. Wallenstein1, E. Gerster2, P. Unger2, M. Zorn3 and M. Weyers3
1 Technische Universität Kaiserslautern, Fachbereich Physik, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern, Germany
2 Universität Ulm, Albert-Einstein-Allee 45, 89081 Ulm, Germany
3 Ferdinand-Braun-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, D-12489 Berlin, Germany
Published in:
Appl. Phys. B 81,443-446(2005).
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Abstract:
We report the generation of blue 489-nm picosecond laser pulses by in-tracavity
second-harmonic generation in a mode-locked optically pumped InGaAs
vertical-external-cavity surface-emitting laser. Mode locking achieved by a semi-conductor
saturable absorber mirror generated 5.8-ps-long sech2-shaped pulses at
an emission wavelength of 978 nm and a repetition rate of 1.88 GHz. Intracavity
frequency doubling in a 5-mm-long lithium triborate crystal generated blue pi-cosecond
pulses with a spectral width of 0.15 nm and an average output power of
up to 6 mW.
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