title: High-power, low-noise, Yb-doped, cladding-pumped, three-level fiber sources at 980 nm.
abstract: We present results on a high-power, cladding-pumped, Yb-doped fiber emitting at 977 nm in laser and ampllified-spontaneous-emission source configurations. We obtained up to 1.4 W of fiber-coupled, single-mode output power and slope efficiency as high as 68%. To our knowledge these are the highest powers efficiencies achieved from a single-mode fiber laser at approximately 980 nm and the first demonstrated results on a high-power amplified-spontaneous-emission source in this wavelength range. High power and high slope efficiency are achieved by using a high numerical aperture (> 0.7), a jacketed air-clad fiber, and a high-brightness pump source. Both types of sources exhibit relative intensity noise below -130 dB/Hz and are thus suitable for a wide range of applications.
authors.affiliation: Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, United Kingdom.
authors.forename: R
authors.initials: R
authors.lastname: Selves
authors.forename: J K
authors.initials: JK
authors.lastname: Sahu
authors.forename: L B
authors.initials: LB
authors.lastname: Fu
authors.forename: J N
authors.initials: JN
authors.lastname: Jang
authors.forename: J
authors.initials: J
authors.lastname: Nilsson
authors.forename: A B
authors.initials: AB
authors.lastname: Grudinin
authors.forename: K H
authors.initials: KH
authors.lastname: Ylä-Jarkko
authors.forename: S A
authors.initials: SA
authors.lastname: Alam
authors.forename: P W
authors.initials: PW
authors.lastname: Turner
authors.forename: J
authors.initials: J
authors.lastname: Moore