title: Dependence of Er:Yb-codoped 1.5 μm amplifier on wavelength-tuned auxiliary seed signal at 1 μm wavelength.
abstract: We report on experiments performed with a cladding-pumped single-mode Er:Yb-codoped single-frequency fiber amplifier simultaneously seeded by a distributed-feedback diode at 1556 nm and a tunable external-cavity diode laser emitting at a wavelength of about 1 μm wavelength. The influence of the output wavelength of the external-cavity laser on amplification and reabsorption behavior of the Yb emission as well as the amplifier performance at a wavelength of 1556 nm is examined experimentally.
authors.affiliation: Laser Zentrum Hannover e.V., Hollerithallee 8, D-30419 Hannover, Germany. v.kuhn@lzh.de
authors.forename: Vincent
authors.initials: V
authors.lastname: Kuhn
authors.forename: Dietmar
authors.initials: D
authors.lastname: Kracht
authors.forename: Jörg
authors.initials: J
authors.lastname: Neumann
authors.forename: Peter
authors.initials: P
authors.lastname: Wessels