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Proceedings Paper

Laser emission from diode-pumped Nd:YAG cladding waveguides obtained by direct writing with a femtosecond-laser beam
Author(s): Gabriela Salamu; Flavius Voicu; Florin Jipa; Marian Zamfirescu; Traian Dascalu; Nicolaie Pavel
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Paper Abstract

Cladding waveguides have been realized in Nd:YAG by direct writing with a femtosecond-laser beam. A classical method that inscribes many tracks around the waveguide circumference with step-by-step translations of the laser medium, and a new technique in which the laser medium is moved on a helical trajectory and that delivers waveguides with well-defined walls were employed. Laser emission on the 1.06 μm 4F3/2→4I11/2 transition and at 1.3 μm on the 4F3/2→4I13/2 line was obtained under the pump with a fiber-coupled diode laser. Thus, laser pulses at 1.06 μm with energy of 1.3 mJ for the pump at 807 nm with pulses of 12.5-mJ energy were recorded from a circular waveguide of 100-μm diameter that was inscribed in a 5-mm long, 0.7-at.% Nd:YAG single crystal by the classical translation technique. A similar waveguide that was realized in a 5-mm long, 1.1-at.% Nd:YAG ceramic increased the 1.06-μm laser pulse energy to 2.15 mJ for the pump pulses of 13.1-mJ energy. Furthermore, a circular waveguide of 100-μm diameter that was inscribed in the Nd:YAG ceramic by the helical-movement method yielded pulses at 1.06 μm with increased maximum energy of 3.2 mJ; the overall optical-to-optical efficiency was 0.24, and the laser operated with a slope efficiency of 0.29. The same device outputted laser pulses at 1.3 μm with energy of 1.15 mJ.

Paper Details

Date Published: 1 May 2014
PDF: 8 pages
Proc. SPIE 9135, Laser Sources and Applications II, 91351F (1 May 2014); doi: 10.1117/12.2052250
Show Author Affiliations
Gabriela Salamu, National Institute for Lasers, Plasma and Radiation Physics (Romania)
Univ. of Bucharest (Romania)
Flavius Voicu, National Institute for Lasers, Plasma and Radiation Physics (Romania)
Univ. of Bucharest (Romania)
Florin Jipa, National Institute for Lasers, Plasma and Radiation Physics (Romania)
Univ. of Bucharest (Romania)
Marian Zamfirescu, National Institute for Lasers, Plasma and Radiation Physics (Romania)
Traian Dascalu, National Institute for Lasers, Plasma and Radiation Physics (Romania)
Nicolaie Pavel, National Institute for Lasers, Plasma and Radiation Physics (Romania)


Published in SPIE Proceedings Vol. 9135:
Laser Sources and Applications II
Jacob I. Mackenzie; Helena JelÍnková; Takunori Taira; Marwan Abdou Ahmed, Editor(s)

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