High-resolution absorption measurement at the zero phonon line of Yb:YAG between 80 K and 300 K

Mariastefania De Vido, Agnieszka Wojtusiak, Klaus Ertel

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Abstract

We present measurements of the temperature dependence of the absorption crosssection of Yb:YAG at the zero phonon line (ZPL) near 969 nm. Experiments were carried out on a 1.08 mm thick, ceramic, 1.1 at-% Yb-doped YAG sample over a temperature range between 80 K and 300 K. Results show that the ZPL characteristics strongly depend on temperature. The absorption cross section increases from 0.8 10-20 cm2 to above 49 10-20 cm2 as temperature is decreased from 300 K to 80 K. The full-width at half maximum of the absorption line decreases with temperature, from 2.38 nm at 300 K to 0.05 nm at 80 K. The absorption peak shifts from 969.04 nm at 300 K to 968.39 nm at 80 K. To the best of our knowledge, this is the first time that the ZPL of Yb:YAG has been characterised with enough resolution at cryogenic temperatures and we expect that this data will assist in the design and optimisation of Yb:YAG lasers pumped on this absorption line.

Original languageEnglish
Pages (from-to)717-723
Number of pages7
JournalOptical Materials Express
Volume10
Issue number3
Early online date7 Feb 2020
DOIs
Publication statusPublished - Mar 2020

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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