Modeling of energy-transfer upconversion and thermal effects in end-pumped quasi-three-level lasers
2004 (English)In: Applied Optics, ISSN 0003-6935, E-ISSN 1539-4522, Vol. 43, no 24, 4735-4767 p.Article in journal (Refereed) Published
An analytical model of cw quasi-three-level lasers that includes the influence of energy-transfer upconversion (ETU) has been developed. The results of the general output modeling were applied to a laser with Gaussian beams, and rigorous numerical calculations have been made to study the influence of ETU on threshold, output power, spatial distribution of population-inversion density, and fractional thermal loading. The model was applied to a laser operating at 946 nm in Nd:YAG, where the dependence of laser-beam size on laser performance was investigated in particular. A simple model for the degradation of laser-beam quality from a transversally varying saturated gain is proposed that is in good agreement with measurements of the laser in a plane-plane cavity.
Place, publisher, year, edition, pages
2004. Vol. 43, no 24, 4735-4767 p.
Color displays, Reabsoprtion losses, Underwater communication, Upconversion effects, Degradation, Energy transfer, Laser beams, Mathematical models, Optical data storage, Parameter estimation, Pumping (laser), Relaxation processes, Lasers
IdentifiersURN: urn:nbn:se:kth:diva-8889DOI: 10.1364/AO.43.004753ISI: 000223415700017ScopusID: 2-s2.0-4444243195OAI: oai:DiVA.org:kth-8889DiVA: diva2:14368
QC 201009012005-12-082005-12-082011-09-23Bibliographically approved