TY - JOUR AU - Behrens, E AU - Powell, R AU - Blackburn, Douglas C2 - Journal of the Optical Society of America B-Optical Physics DA - 1990-08-01 LA - en M1 - 7 PB - Journal of the Optical Society of America B-Optical Physics PY - 1990 TI - CHARACTERISTICS OF LASER-INDUCED GRATINGS IN PR-3+-DOPED AND EU-3+-DOPED SILICATEGLASSES ER -