
Efficient holmium-doped fluoride fiber laser emitting 21 µm and blue upconversion fluorescence upon excitation at 2 µm
Author(s) -
A. Guhur,
Stuart D. Jackson
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.020164
Subject(s) - photon upconversion , materials science , fiber laser , holmium , optics , laser , fluorescence , optoelectronics , doping , slope efficiency , fiber , wavelength , optical fiber , physics , composite material
We demonstrate a highly efficient and high power Ho(3+)-doped fluoride glass fiber laser that is resonantly pumped with a Tm(3+)-doped silicate glass fiber laser operating at 2.051 µm. The laser operates at 2080 nm and generated 6.66 W at a slope efficiency of 72%. We observe strong visible upconversion fluorescence centered at a variety of wavelengths including 491 nm which results from three sequential energy transfer upconversion processes; the fluorescence to pump energy ratio for this emission is one the largest reported to date.