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Proceedings Paper

Experimental and computer-modeled results of titanium sapphire lasers pumped by copper vapor lasers
Author(s): Martyn R. H. Knowles; Colin E. Webb; Graham A. Naylor
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Paper Abstract

The absorption band of titanium sapphire is excellently matched to the 510.6 nm and 578.2 nm emission lines of the copper vapor laser (CVL). The availability of high power and high repetition rate output from CVLs allows the generation of high average power tunable radiation from these crystals at the repetition rate of the pump. Such lasers fulfill the rapid data collection requirement of many spectroscopic applications such as resonance ionization mass spectrometry. A computer model of the absorption of CVL radiation in the crystal which incorporates the polarization and beam quality of the pump laser is used to map the gain distribution in the crystal so enabling parameters such as crystal doping level and length to be optimized. Gain switched analysis of the titanium sapphire laser predicts threshold, slope efficiency, pulse width and pulse build up time which are in good agreement with observed values. Thermal effects have also been computed. The experimental pump energy for threshold is typically 25 (mu) J and the slope efficiency for broadband lasing is greater than 20% with output powers up to 750 mW. The shortest pulse width and build-up time observed are 24 ns and 60 ns, respectively, for a resonator with a 0.85 m round-trip length. Tuning methods and resonator designs are also reviewed.

Paper Details

Date Published: 1 July 1991
PDF: 7 pages
Proc. SPIE 1410, Solid State Lasers II, (1 July 1991); doi: 10.1117/12.43600
Show Author Affiliations
Martyn R. H. Knowles, Univ. of Oxford (United Kingdom)
Colin E. Webb, Univ. of Oxford (United Kingdom)
Graham A. Naylor, Oxford Lasers Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 1410:
Solid State Lasers II
George Dube, Editor(s)

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