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Reduction of thermal effects in a 2.7-µm Er:Y 2 O 3 ceramic laser with annular pumping.
- Source :
-
Optics express [Opt Express] 2023 Jan 16; Vol. 31 (2), pp. 2584-2592. - Publication Year :
- 2023
-
Abstract
- Reduction of thermal effects is a challenging aspect for power scaling of 2.7-µm bulk Er-lasers due to the large quantum defect when pumping at ∼ 0.97 µm. Here, we demonstrate that thermal effects in an Er:Y <subscript>2</subscript> O <subscript>3</subscript> ceramic laser can be significantly reduced pumping by an annular beam, thus improving the continuous-wave (CW) laser performance in the 3-µm spectral range. The excitation conditions of the TEM <subscript>00</subscript> mode were determined theoretically by taking into account the propagation characteristics of the annular pump beam. For a comparison, the temperature and stress distributions are at first theoretically studied with three different pump configurations. In the experiment, output power of the Er:Y <subscript>2</subscript> O <subscript>3</subscript> ceramic laser improved by ∼ 60% by changing the pump beam from coventional quasi-top-hat to a designed annular one. This work, as a proof-of-principle study, indicates the potential of power scaling of the 2.7-µm bulk Er-lasers pumping with an annular beam.
Details
- Language :
- English
- ISSN :
- 1094-4087
- Volume :
- 31
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Optics express
- Publication Type :
- Academic Journal
- Accession number :
- 36785268
- Full Text :
- https://doi.org/10.1364/OE.480430