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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

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Ultralow-pump-threshold, femtosecond CR31+:LiSrAlF6 laser pumped by a single narrow-stripe AlGaInP laser diode

Valentine, G.J. and Hopkins, J.M. and LozaAlvarez, P. and Kennedy, G.T. and Sibbett, W. and Burns, D. and Valster, A. (1997) Ultralow-pump-threshold, femtosecond CR31+:LiSrAlF6 laser pumped by a single narrow-stripe AlGaInP laser diode. Optics Letters, 22 (21). pp. 1639-1641. ISSN 0146-9592

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Abstract

We report what we believe to be the first demonstration of a Kerr-lens mode-locked Cr31:LiSrAlF6 laser that is pumped by a single narrow-stripe AlGaInP laser diode with a diffraction-limited output beam. A novel low-loss three-mirror laser cavity design is described in which strong, localized Kerr lensing was exploited such that 75-fs-duration pulses were obtained for only 36 mW of incident pump power. This pump power was maintained for 18 h by just three AA batteries as the electrical power source. We have shown that mode locking can be sustained for pump powers as low as 22 mW.