Journal of LuminescencePhoton echo relaxation and hole burning in Tb3+: LiYF4 and LiTbF4G. K. Liu, M.‐F. Joubert, R. L. Cone, B. JacquierPublished Feb 1, 1988• 9 citationsPublisherDOI10.1016/0022-2313(88)90325-0