title: Observation of erasable holographic gratings at room temperature in Eu(3+)-doped glasses.
abstract: The characteristics of four-wave mixing signals were studied in Eu(3+)-doped glasses. When the Eu(3+) ions were resonantly excited, two types of laser-induced grating were formed: a transient population grating associated with the excited Eu(3+) ions and a holographic grating, which was permanent at room temperature but could be erased either thermally or optically.
authors.forename: E G
authors.initials: EG
authors.lastname: Behrens
authors.forename: F M
authors.initials: FM
authors.lastname: Durville
authors.forename: R C
authors.initials: RC
authors.lastname: Powell