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Proceedings Paper

Simultaneous visible and near-infrared emission from a pulse-stretched alexandrite laser source
Author(s): Bruce Boczar; Thanga Thevar; Ivelina Rousseva; Norman Kramer; Brian Pryor; Rick Frost
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Paper Abstract

An efficient method to make multi-spectral laser light having any selected pulsed duration in the range of 100 ns to 1 μs has been demonstrated in the laboratory. This laser system, based on the alexandrite tunable solid-state gain medium, which is tunable in its fundamental between 720 and 800 nm, was constructed near the gain maximum of 755 nm. A novel intracavity pulse-stretcher provides control of the pulse duration up to about 5 μs using the Pockels effect. In the demonstration prototype, however, the pulse duration was restricted to 500 ns to maintain the peak power needed for efficient nonlinear conversion. Following an amplification stage, Raman shifting in hydrogen gas was used to achieve efficient wavelength conversion to 1100 nm. The Raman shifted beam was frequency doubled to 550 nm using two BBO crystals arranged for walk-off compensation. The result was a convenient source of light whose spectral content, pulse duration, as well as other parameters, could be critically controlled.

Paper Details

Date Published: 8 July 2004
PDF: 8 pages
Proc. SPIE 5332, Solid State Lasers XIII: Technology and Devices, (8 July 2004); doi: 10.1117/12.528424
Show Author Affiliations
Bruce Boczar, Light Age, Inc. (United States)
Thanga Thevar, Light Age, Inc. (United States)
Ivelina Rousseva, Light Age, Inc. (United States)
Norman Kramer, Light Age, Inc. (United States)
Brian Pryor, Light Age, Inc. (United States)
Rick Frost, Light Age, Inc. (United States)

Published in SPIE Proceedings Vol. 5332:
Solid State Lasers XIII: Technology and Devices
Richard Scheps; Hanna J. Hoffman, Editor(s)

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