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Título
Transition of pulsed operation from Q-switching to continuous-wave mode-locking in a Yb:KLuW waveguide laser
Autor(es)
Materia
Femtosecond laser writing
Laser efficiency
Laser modes
Laser systems
Semiconductor saturable absorber mirrors
Waveguide lasers
Fecha de publicación
2020-06
Citación
Ji Eun Bae, Xavier Mateos, Magdalena Aguiló, Francesc Díaz, Javier Rodríguez Vázquez de Aldana, Carolina Romero, Hansuek Lee, and Fabian Rotermund, "Transition of pulsed operation from Q-switching to continuous-wave mode-locking in a Yb:KLuW waveguide laser," Opt. Express 28, 18027-18034 (2020)
Resumen
We report on the diverse pulsed operation regimes of a femtosecond-laser-written Yb:KLuW channel waveguide laser emitting near 1040 nm. By the precise position tuning of a carbon-nanotube-coated saturable absorber (SA) mirror, the transition of the pulsed operation from Q-switching, Q-switched mode-locking and finally sub-GHz continuous-wave mode-locking are obtained based on the interplay of dispersion and mode area control. The Q-switched pulses exhibit typical fast SA Q-switched pulse characteristics depending on absorbed pump powers. In the Q-switched mode-locking, amplitude modulations of the mode-locked pulses on the Q-switched envelope are observed. The radio-frequency spectrum represents the coexistence of Q-switching and mode-locking signals. In the purely mode-locked operation, the waveguide laser generates 2.05-ps pulses at 0.5 GHz.
URI
DOI
10.1364/OE.395701
Colecciones
- ALF. Artículos [297]
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