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Titel
Fs-laser-written thulium waveguide lasers Q-switched by graphene and MoS2
Autor(es)
Schlagwort
Femtosecond laser writing
Laser beams
Laser materials
Laser sources
Q switched lasers
Semiconductor saturable absorber mirrors
Clasificación UNESCO
2209 Óptica
2209.10 láseres
Fecha de publicación
2019
Verlag
Optical Society of America (Washington (D.C.), Estados Unidos)
Citación
E. Kifle, P. Loiko, J. Vázquez de Aldana, C. Romero, A. Rádenas, V. Zakharov, A. Veniaminov, H. Yu, H. Zhang, Y. Chen, M. Aguiló, F. Díaz, U. Griebner, V. Petrov, and X. Mateos (2019). Fs-laser-written thulium waveguide lasers Q-switched by graphene and MoS2. Opt. Express 27, 8745-8755
Resumen
[EN]We report the generation of mid-infrared (~2 µm) high repetition rate (MHz) sub-100 ns pulses in buried thulium-doped monoclinic double tungstate crystalline waveguide lasers using two-dimensional saturable absorber materials, graphene and MoS2. The waveguide (propagation losses of ~1 dB/cm) was micro-fabricated by means of ultrafast femtosecond laser writing. In the continuous-wave regime, the waveguide laser generated 247 mW at 1849.6 nm with a slope efficiency of 48.7%. The laser operated at the fundamental transverse mode with a linearly polarized output. With graphene as a saturable absorber, the pulse characteristics were 88 ns / 18 nJ (duration / energy) at a repetition rate of 1.39 MHz. Even shorter pulses of 66 ns were achieved with MoS2. Graphene and MoS2 are therefore promising for high repetition rate nanosecond Q-switched infrared waveguide lasers.
URI
DOI
10.1364/OE.27.008745
Versión del editor
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- ALF. Artículos [314]
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