Institut Lumière MatièreEffects of F- on the optical and spectroscopic properties of Yb3+/Al3+-co-doped silica glass. XU WENBIN, YU CHUNLEI, WANG SHIKAI, LOU FENGGUANG, FENG … http://ilm.univ-lyon1.fr/index.php?option=com_mipersonal&task=8&mod=15