Tunable CW alexandrite laser

Abstract

Wavelength-tunable CW laser action has been obtained from solid-state alexandrite, BeAl <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> O <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</inf> :Cr <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3+</sup> . Laser emission occurred between 744 and 788 nm with a maximum of 6.5 W observed at the 765 nm wavelength with 3 kW of mercury arc excitation.