Open AccessRoom temperature mid-infrared fiber lasing beyond 5 µm in chalcogenide glass small-core step index fiber
Author(s) -
Joel Nunes,
Ł. Sójka,
Richard Crane,
David Furniss,
Zhuoqi Tang,
David Mabwa,
Boyu Xiao,
T.M. Benson,
M.C. Farries,
N. Kalfagiannis,
Emma R. Barney,
Sendy Phang,
Angela B. Seddon,
S. Sujecki
Publication year - 2021
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.430891
Subject(s) - materials science , analytical chemistry (journal) , chemistry , chromatography
This Letter, to the best of our knowledge, reports mid-infrared fiber lasing beyond 5 µm at room temperature for the first time, C e 3+ -doped, chalcogenide glass, step index fiber employed in-band pumping with a 4.15 µm quantum cascade laser. The lasing fiber is was 64 mm long, with a calculated numerical aperture of 0.48 at the lasing wavelengths. The core glass was G e 15 A s 21 G a 1 S e 63 atomic % (at. %), doped with 500 parts-per-million-by-weight Ce, with a 9 µm core diameter. The cladding glass was G e 21 S b 10 S e 69 at. % with a 190 µm outer diameter. As pump power increases continuous wave lasing corresponding to the 2 F 7/2 → 2 F 5/2 , transition in the C e 3+ ion occurs at 5.14 µm, 5.17 µm, and 5.28 µm.