Three-micron laser action in Dy3+
An experimental investigation was made of laser action in Dy3+ ions in an LaF3 crystal excited by neodymium laser radiation. It is shown by calculation that neodymium laser radiation may be converted to the three-micron range with an efficiency of the order of 10% using Y3Al5O12:Yb3+:Dy3+ and BaY2F8:Dy3+ media.