Femtosecond-Laser-Written Waveguide Lasers at ~2 μm

Xavier Mateos; Esrom Kifle; Pavel Loiko; Carolina Romero; Javier Rodríguez Vázquez de Aldana; Airán Ródenas; Airán Ródenas; Sun Yung Choi; Ji Eun Bae; Fabian Rotermund; Uwe Griebner; Valentin Petrov; Magdalena Aguiló; Francesc Díaz

2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
OSA Technical Digest (Optica Publishing Group, 2019),
paper ca_3_3

Femtosecond-Laser-Written Waveguide Lasers at ~2 μm

Xavier Mateos, Esrom Kifle, Pavel Loiko, Carolina Romero, Javier Rodríguez Vázquez de Aldana, Airán Ródenas, Sun Yung Choi, Ji Eun Bae, Fabian Rotermund, Uwe Griebner, Valentin Petrov, Magdalena Aguiló, and Francesc Díaz

The European Conference on Lasers and Electro-Optics 2019

Munich Germany
23–27 June 2019
ISBN: 978-1-7281-0469-0

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Waveguide lasers (ca_3)

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X. Mateos, E. Kifle, P. Loiko, C. Romero, J. R. V. de Aldana, A. Ródenas, S. Y. Choi, J. E. Bae, F. Rotermund, U. Griebner, V. Petrov, M. Aguiló, and F. Díaz, "Femtosecond-Laser-Written Waveguide Lasers at ~2 μm," in 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, OSA Technical Digest (Optica Publishing Group, 2019), paper ca_3_3.

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Abstract

In this work, we review our recent results on fabrication, optical characterization and continuous-wave and passively Q-switched 2-μm laser operation of active waveguides (WGs) produced by femtosecond direct laser writing (fs-DLW) in thulium and holmium doped low-symmetry (monoclinic) crystals. Fs-DLW was performed by 120-fs / 1-kHz pulses at 795 nm [1]. Various depressed-index photonic micro-structures were fabricated, Fig. 1, such as buried channel WGs with circular and hexagonal (lattice-like) cladding, surface WGs with a half-ring cladding, and straight WGs and Y-branch splitters with a rectangular cross-section. The WG core size was in the range 40–100 μm, comprising both fundamental- and multi-mode WGs.

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