Thermal lens characterization of a side-pumped Nd:YVO4 laser

A. Agnesi, F. Pirzio, A. Tomaselli, F. Bonfigli, T. Marolo

Research output: Contribution to conferencePaper

3 Citations (Scopus)

Abstract

We present a diode side-pumped Nd:YVO4laser emitting up to 11 W CW output power c axis polarized at 1064 nm in a bounce geometry. We employed a 2×4×12 mm3, 6° wedge, 1.1% Nd3+doped slab crystal. We set up a compact 2-mirrors cavity design using a cylindrical high reflectivity mirror (curved in the tangential plane) and several plane output coupler. The optimum total internal reflection angle of the designed bounce geometry, leading to the maximum output power, was measured to be about 3.5×. The overall length of the cavity ranges from 8 to 11 cm depending on the investigated configuration. As much as 11 W CW output power was obtained for approximately 26 W of absorbed pump power at 808 nm, with a slope efficiency up to 50% and a near diffraction limited output beam in the vertical direction. An overall M2< 3 was obtained at the maximum output power. We also present a focal thermal lens characterization of the cavity carried out by the combined study of the beam quality and beam transverse dimensions inside the cavity in two different experimental setup. The study was based on a first order dependence of the focal thermal length on the absorbed pump power model fth α k/Pabs. Our results are in good agreement with the model and the experimental behaviour of the system confirmed the outcome of the focal thermal lens measurements.
Original languageEnglish
DOIs
Publication statusPublished - 2005
Externally publishedYes
EventXV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, GCL/HPL 2004 - , Czech Republic
Duration: 1 Jan 2005 → …

Conference

ConferenceXV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, GCL/HPL 2004
CountryCzech Republic
Period1/1/05 → …

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All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Agnesi, A., Pirzio, F., Tomaselli, A., Bonfigli, F., & Marolo, T. (2005). Thermal lens characterization of a side-pumped Nd:YVO4 laser. Paper presented at XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, GCL/HPL 2004, Czech Republic. https://doi.org/10.1117/12.611068