title: Correlation of defect centers with second-harmonic generation in Ge-doped and Ge-P-doped silica-core single-mode fibers.
abstract: The origin of frequency doubling in Ge-doped silica-core single-mode glass fibers has been investigated with electron-spin-resonance spectrometry. Correlations have been observed between the conversion efficiency and the light-induced Ge E' center concentration.
authors.forename: T E
authors.initials: TE
authors.lastname: Tsai
authors.forename: M A
authors.initials: MA
authors.lastname: Saifi
authors.forename: E J
authors.initials: EJ
authors.lastname: Friebele
authors.forename: D L
authors.initials: DL
authors.lastname: Griscom
authors.forename: U
authors.initials: U
authors.lastname: Osterberg