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Efficient, high repetition-rate femtosecond blue source using a compact Cr:LiSAF laser

Agate, B. and Kemp, A. and Brown, C.T.A. and Sibbett, W. (2002) Efficient, high repetition-rate femtosecond blue source using a compact Cr:LiSAF laser. Optics Express, 10 (16). pp. 824-831. ISSN 1094-4087

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Abstract

We present a practical route to designing a portable femtosecond blue light source that is rugged, compact and battery-powered. An opticaloptical second-harmonic generation (SHG) efficiency of 30% is reported using a diode-pumped, femtosecond Cr:LiSAF laser requiring only ~1.2W of electrical drive. 12mW of blue average power is generated using a 3mm KNbO3 crystal in a simple, single-pass extracavity geometry. The corresponding electrical-blue efficiency of 1% is, to our knowledge, the highest reported efficiency of any femtosecond blue source. Despite conditions of large group velocity mismatch, we show that the temporally-broadened blue pulses remain well within the femtosecond regime, at ~540fs.

Item type: Article
ID code: 5322
Keywords: lasers, laser optics, nonlinear optics, harmonic generation, photonics, Optics. Light, Atomic and Molecular Physics, and Optics
Subjects: Science > Physics > Optics. Light
Department: Faculty of Science > Physics > Institute of Photonics
Depositing user: Strathprints Administrator
Date deposited: 07 Feb 2008
Last modified: 06 Jan 2017 04:43
URI: https://strathprints.strath.ac.uk/id/eprint/5322
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