Generation of a radially polarized beam in a polycrystalline ceramic Yb:Lu2O3 thin-disk laser

Generation of a radially polarized beam in a polycrystalline ceramic Yb:Lu2O3 thin-disk laser

We report on the generation of a continuous-wave (CW) radially polarized beam with an Yb:Lu 2 O 3 polycrystalline ceramic disk in a thin-disk laser (TDL) oscillator. A circular grating-waveguide mirror (CGWM) with a high polarization discrimination given by a reflectivity difference between the two...

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Veröffentlicht in:Applied physics. B, Lasers and optics Lasers and optics, 2023-09, Vol.129 (9), Article 146
Hauptverfasser: Didychenko, Denys, Esser, Stefan, Beirow, Frieder, Savchenko, Anton, Pruss, Christof, Graf, Thomas, Abdou Ahmed, Marwan
Format: Artikel
Sprache:eng
Schlagworte:
Applied physics
Beams (radiation)
Continuous radiation
Engineering
Lasers
Lutetium oxide
Optical Devices
Optics
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Polarization
Polycrystals
Quantum Optics
Waveguides
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Zusammenfassung:We report on the generation of a continuous-wave (CW) radially polarized beam with an Yb:Lu 2 O 3 polycrystalline ceramic disk in a thin-disk laser (TDL) oscillator. A circular grating-waveguide mirror (CGWM) with a high polarization discrimination given by a reflectivity difference between the two orthogonal polarization states of 44.6% was used as a polarization-selective cavity end-mirror. An output power of 175 W was achieved with an optical efficiency of 39.6%. A high degree of radial polarization of 96.2% and a beam propagation factor of M 2 hor.  = 2.05 and M 2 ver.  = 2.32 were measured at the maximum output power.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-023-08089-6