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Rare earth co-doping for increased the efficiency of resonantly pumped Er-fiber lasers

2019; Optica Publishing Group; Volume: 9; Issue: 3 Linguagem: Inglês

10.1364/ome.9.001041

2159-3930

Colin Baker, Ashley A. Burdett, E. J. Friebele, Daniel L. Rhonehouse, Woohong Kim, Jasbinder S. Sanghera,

Optical Network Technologies

Rare earth co-doping of erbium with optically inactive ytterbium or lanthanum ions was investigated in silica fibers for resonant pumping of amplifiers and lasers. The co-dopants are optically inactive when pumped at 1475 nm and therefore their main role is to reduce erbium clustering in solution-doped fibers. We have demonstrated increased efficiencies compared to fibers where no co-dopants are used. With this technique, a single mode Er-La fiber with an Er ion concentration of 0.98x1025 ions/m3, exhibited a slope efficiency of 79.6% in a core-pumped master oscillator-power amplifier (MOPA) with a signal wavelength of 1560 nm.