Efficient 1 GHz Ti:sapphire laser with improved broadband continuum in the infrared

Details Efficient 1 GHz Ti:sapphire laser with improved broadband continuum in the infrared Efficient 1 GHz Ti:sapphire laser with improved broadband continuum in the infrared

2006-02-14

arxiv.org/abs/physics/0602095v1

Physics

Optics

Scientific paper

10.1364/OL.31.002069

We demonstrate a 1 GHz prismless femtosecond Ti:sapphire ring laser which emits 890 mW for 7.6W of pump power over a continuum extending from 585 to 1200 nm at -20 dB below the maximum. A broadband continuum is obtained without careful mirror dispersion compensation, with the net cavity group-delay-dispersion having -50 to +100 fs2 oscillations from 700 to 900 nm. Further broadening is obtained by use of a slightly convex cavity mirror that increases self-phase modulation. 17% (75%) of the intracavity (output) power is generated in single-pass through the crystal, outside the cavity bandwidth and concentrated in the low gain infrared region from 960 to 1200 nm. This laser seems well suited for optical frequency metrology, possibly allowing easier stabilization of the carrier-to-envelope offset frequency without use of photonic fibers.

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