15 February 2012 Frequency-doubled diode laser for direct pumping of Ti:sapphire lasers
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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.
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André Müller, Ole B. Jensen, Angelika Unterhuber, Tuan Le, Andreas Stingl, Karl-Heiz Hasler, Bernd Sumpf, Götz Erbert, Peter E. Andersen, Paul M. Petersen, "Frequency-doubled diode laser for direct pumping of Ti:sapphire lasers", Proc. SPIE 8235, Solid State Lasers XXI: Technology and Devices, 82351F (15 February 2012); doi: 10.1117/12.906403; https://doi.org/10.1117/12.906403
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