A. D. Zverev, V. A. Kamynin, V. B. Tsvetkov, D. G. Kochiev
Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow
Abstract: Stable generation regimes of both single ultrashort pulses and pulse trains in the spectral range 1540–1600 nm are demonstrated for two configurations of dumbbell-shaped and ring fibre laser cavities. In both configurations, mode-locking is ensured by a nonlinear rotation of the polarisation plane. An advantage of using a dumbbell-shaped cavity with a circulator in an erbium-doped fibre laser to obtain single-pulse lasing is demonstrated in comparison with a classical ring cavity assembled on similar elements.
Keywords: erbium, fibre laser, ultrashort pulses, dumbbell cavity.
Received: 27.05.2022
Revised: 05.07.2022