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Proceedings Paper

Wavelength tunability of laser based on Yb-doped YGAG ceramics
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Paper Abstract

The wavelength tunability of diode pumped laser based on Yb-doped mixed garnet Y3Ga2Al3O12 (Yb:YGAG) ceramics was investigated. The tested Yb:YGAG sample (10% Yb/Y) was in the form of 2mm thick plane-parallel face-polished plate (without AR coatings). A fiber (core diameter 100 μm, NA= 0.22) coupled laser diode (LIMO, LIMO35-F100-DL980-FG-E) with emission at wavelength 969 nm, was used for longitudinal Yb:YGAG pumping. The laser diode was operating in the pulsed regime (2 ms pulse length, 10 Hz repetition rate). The duty-cycle 2% ensured a low thermal load even under the maximum diode pumping power amplitude 20W (ceramics sample was only air-cooled). The 145mm long semi-hemispherical laser resonator consisted of a flat pumping mirror (HR @ 1.01 − 1.09 μm, HT @ 0.97 μm) and curved (r = 150mm) output coupler with a reflectivity of ∼ 97% @ 1.01 − 1.09 μm. Wavelength tuning of the ytterbium laser was accomplished by using a birefringent filter (single 1.5mm thick quartz plate) placed inside the optical resonator at the Brewster angle between the output coupler and the laser active medium. The laser was continuously tunable over ∼ 58nm (from 1022nm to 1080 nm) and the tuning band was mostly limited by the free spectral range of used birefringent filter. The maximum output power amplitude 3W was obtained at wavelength 1046nm for absorbed pump power amplitude 10.6W. The laser slope efficiency was 34%.

Paper Details

Date Published: 20 February 2015
PDF: 9 pages
Proc. SPIE 9342, Solid State Lasers XXIV: Technology and Devices, 93421T (20 February 2015); doi: 10.1117/12.2077494
Show Author Affiliations
Jan Šulc, Czech Technical Univ. in Prague (Czech Republic)
Helena Jelínková, Czech Technical Univ. in Prague (Czech Republic)
Venkatesan Jambunathan, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
Taisuke Miura, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
Akira Endo, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
Antonio Lucianetti, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
Tomáš Mocek, Institute of Physics of the ASCR, v.v.i. (Czech Republic)


Published in SPIE Proceedings Vol. 9342:
Solid State Lasers XXIV: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)

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