Frequency-doubled diode laser for direct pumping of Ti:sapphire lasers

André Müller, Ole Bjarlin Jensen, Angelika Unterhuber, Tuan Le, Andreas Stingl, Karl-Heinz Hasler, Bernd Sumpf, Götz Erbert, Peter E. Andersen, Paul Michael Petersen

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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.
Original languageEnglish
JournalProceedings of SPIE, the International Society for Optical Engineering
Pages (from-to)82351F
Publication statusPublished - 2012
EventSPIE Photonics West : Solid State Lasers XXI: Technology and Devices - San Francisco, CA, United States
Duration: 23 Jan 201226 Jan 2012


ConferenceSPIE Photonics West : Solid State Lasers XXI: Technology and Devices
Country/TerritoryUnited States
CitySan Francisco, CA


  • Diode lasers
  • Frequency conversion
  • Optical pumping
  • Ti:sapphire lasers
  • Ultrashort pulses


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