Abstract

Efficient laser operation was realized in Nd:Se₂O₃ at 966run (η= 43%), 1082run (η= 58%), and 1486run (η= 24%) with 1200mW of absorbed pump from a Ti:Al₂O₃ laser. Absorption, emission and excited state absorption cross sections were measured. Peak cross sections are σ_abs= 7.1 10⁻²⁰cm² at 825nm in absorption, and σ_SE= 1.9 10⁻²⁰cm² at 966nm, σ_SE= 8.2 10⁻²⁰cm² at 1082run, and σ_SE= 5.5 10⁻²⁰cm2 at 1367run in emission. It is supposed that lasing on the strong emission line at 1367run is prevented by excited state absorption.

© 1999 Optical Society of America