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The behaviour of a diode pumped figure-of-eight ytterbium/erbium-doped fibre laser which generates subpicosecond pulses is described. This laser is observed to mode-lock simultaneously in two orthogonal polarisation states with distinct temporal and spectral characteristics.
Inspec keywords: laser mode locking; optical pumping; light polarisation; fibre lasers; high-speed optical techniques; erbium; ytterbium
Other keywords:
Subjects: Fibre lasers and amplifiers; Solid lasers; Ultrafast optical techniques; Other fibre optical devices and techniques; Fibre optics; Laser beam modulation, pulsing and switching; mode locking and tuning