Frequency-doubled diode laser for direct pumping of Ti:sapphire lasers
A. Müllera, O.B. Jensena, A. Unterhuberb, T. Leb, A. Stinglb, K.-H. Haslerc, B. Sumpfc, G. Erbertc, P.E. Andersena, P.M. Petersena
Published in:
Proc. SPIE, vol. 8235, no. 82351F (2012).
Abstract:
A single-pass frequency doubled high-power tapered diode laser emitting nearly 1.3 W of green light suitable for direct pumping of Ti:sapphire lasers generating ultrashort pulses is demonstrated. The pump efficiencies reached 75 % of the values achieved with a commercial solid-state pump laser. However, the superior electro-optical efficiency of the diode laser improves the overall efficiency of the Ti:sapphire laser by a factor > 2. The optical spectrum emitted by the Ti:sapphire laser shows a spectral width of 112 nm (FWHM). Based on autocorrelation measurements, pulse widths of less than 20 fs are measured. These results open the opportunity of establishing diode laser pumped Ti:sapphire lasers for e.g. biophotonic applications like retinal optical coherence tomography or pumping of photonic crystal fibers for CARS microscopy.
a Department of Photonics Engineering, Technical University of Denmark, Frederiksborgvej 399, 4000 Roskilde, Denmark
b Femtolasers Produktions GmbH, Fernkorngasse 10, 1100 Vienna, Austria
c Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, D-12489 Berlin, Germany
Keywords:
Diode lasers, Frequency conversion, Optical pumping, Ti:sapphire lasers, Ultrashort pulses.
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