Laser-diode-pumped red and green upconversion fibre lasers

Abstract

Two single spatial mode laser diodes, one at 833 nm, the other at either 985 or 1016nm, simultaneously pumped a Pr/Yb co-doped fluoride fibre laser at room temperature. With appropriate laser mirrors, CW laser oscillation was observed at red and green wavelengths. The fibre laser produced over 6mW at 635nm and 0.7 mW at 521 nm. Laser excitation spectra were taken by alternately replacing one of the pump laser diodes by a tunable Ti:sapphire laser.