title: Theoretical study of population inversion in active doped MIR chalcogenide glass fibre lasers (invited).
abstract: We study the mechanism of the population inversion in mid-infrared fibre lasers based on a chalcogenide glass host doped with active lanthanide ions. Three lanthanide dopant ions are considered: terbium, dysprosium and praseodymium. We predict the relevant trivalent ion level populations and gain. The simulation parameters were obtained by fabricating and optically characterising a series of trivalent ion doped chalcogenide glass samples. We also provide simple analytical expressions that aid the design of the cascade lasing process.
authors.affiliation: Electrical Systems and Optics Division, George Green Institute for Electromagnetics Research, The University of Nottingham, University Park, Nottingham, NG7-2RD UK.
authors.forename: S
authors.initials: S
authors.lastname: Sujecki
authors.affiliation: Electrical Systems and Optics Division, George Green Institute for Electromagnetics Research, The University of Nottingham, University Park, Nottingham, NG7-2RD UK.
authors.forename: A
authors.initials: A
authors.lastname: Oladeji
authors.affiliation: Electrical Systems and Optics Division, George Green Institute for Electromagnetics Research, The University of Nottingham, University Park, Nottingham, NG7-2RD UK.
authors.forename: A
authors.initials: A
authors.lastname: Phillips
authors.affiliation: Electrical Systems and Optics Division, George Green Institute for Electromagnetics Research, The University of Nottingham, University Park, Nottingham, NG7-2RD UK.
authors.forename: A B
authors.initials: AB
authors.lastname: Seddon
authors.affiliation: Electrical Systems and Optics Division, George Green Institute for Electromagnetics Research, The University of Nottingham, University Park, Nottingham, NG7-2RD UK.
authors.forename: T M
authors.initials: TM
authors.lastname: Benson
authors.affiliation: Electrical Systems and Optics Division, George Green Institute for Electromagnetics Research, The University of Nottingham, University Park, Nottingham, NG7-2RD UK.
authors.forename: H
authors.initials: H
authors.lastname: Sakr
authors.affiliation: Electrical Systems and Optics Division, George Green Institute for Electromagnetics Research, The University of Nottingham, University Park, Nottingham, NG7-2RD UK.
authors.forename: Z
authors.initials: Z
authors.lastname: Tang
authors.affiliation: Electrical Systems and Optics Division, George Green Institute for Electromagnetics Research, The University of Nottingham, University Park, Nottingham, NG7-2RD UK.
authors.forename: E
authors.initials: E
authors.lastname: Barney
authors.affiliation: Electrical Systems and Optics Division, George Green Institute for Electromagnetics Research, The University of Nottingham, University Park, Nottingham, NG7-2RD UK.
authors.forename: D
authors.initials: D
authors.lastname: Furniss
authors.affiliation: Electrical Systems and Optics Division, George Green Institute for Electromagnetics Research, The University of Nottingham, University Park, Nottingham, NG7-2RD UK ; Institute of Telecommunications and Acoustics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
authors.forename: Ł
authors.initials: Ł
authors.lastname: Sójka
authors.affiliation: Institute of Telecommunications and Acoustics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
authors.forename: E
authors.initials: E
authors.lastname: Bereś-Pawlik
authors.affiliation: LISA Laser Products OHG Fuhrberg & Teichmann, Max-Planck-Str. 1, 37191 Katlenburg-Lindau, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Scholle
authors.affiliation: LISA Laser Products OHG Fuhrberg & Teichmann, Max-Planck-Str. 1, 37191 Katlenburg-Lindau, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Lamrini
authors.affiliation: LISA Laser Products OHG Fuhrberg & Teichmann, Max-Planck-Str. 1, 37191 Katlenburg-Lindau, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Furberg
keywords:  Mid-infrared light; Fibre laser modelling; Fibre lasers; Low phonon energy glasses