Tunable CW lasing around 0.82, 1.48, 1.88 and 2.35 μm in thulium-doped fluorozirconate fibre

Abstract

Tunable CW operation of a thulium-doped fluorozirconate fibre laser around 0.82 μm, 1.48 μm, 1.88 μm and 2.35 μm is reported. The fibre is single mode above 1.7 μm. Laser dynamics and competition or collaboration between these wavelengths are examined.