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Spatial hole burning in Yb:YAG thin-disk lasers

  • The spatially varying intensity in a standing wave resonator leads to spatial hole burning in the gain medium of a laser. The spatial hole burning changes the gain of different longitudinal modes and can thus determine the optical spectrum of the laser. We simulate this longitudinal mode competition in standing wave resonators of thin-disk lasers. The resulting optical spectra of the laser are compared to measured optical spectra. We examine two types of resonators: I-resonators and V-resonators with different angles of incidence. In V-resonators, the non-normal incidence of the laser beam on the disk lifts the degeneracy of the polarization. Experiments show that the slight gain advantage for the p-polarization does not lead to polarized emission. For both types of resonators, the measured spectra are in good agreement with the simulated ones. The simulations allow to study the influence of spectral intra-cavity losses on the optical spectrum of a thin-disk laser.

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Author:Ulrich Wittrock, Christian Vorholt
Parent Title (English):Appl. Phys. B
Document Type:Article
Date of Publication (online):2015/08/26
Year of first Publication:2015
Release Date:2015/08/26
First Page:711
Last Page:721
Faculties:Physikingenieurwesen (PHY)
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 62 Ingenieurwissenschaften / 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Publication list:Wittrock, Ulrich
Licence (German):License LogoZweitveroeffentlichung