Thermal limitations of volume Bragg gratings used in lasers for spectral control
2013 (English)In: Journal of the Optical Society of America. B, Optical physics, ISSN 0740-3224, Vol. 30, no 6, 1402-1409 p.Article in journal (Refereed) Published
In this paper we present experiments and calculations of the property changes of a highly reflecting volume Bragg grating (VBG) when it is used as a laser cavity mirror. A small absorption of the reflected laser beam resulted in a laser output power roll-off, increased coupling through the VBG, and a change of the spectrum from a single to a double peak at high power. The simulations revealed that an inhomogeneous temperature distribution deformed the grating such that the diffraction efficiency was reduced and the light penetrated deeper into the VBG, which accelerated the deteriorating effects. We extrapolated the power limit found in our investigations for various beam radii and absorption coefficients.
Place, publisher, year, edition, pages
2013. Vol. 30, no 6, 1402-1409 p.
Thermal effects, volume Bragg grating, VBG, Laser, Ytterbium
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-121998DOI: 10.1364/JOSAB.30.001402ISI: 000319739100003ScopusID: 2-s2.0-84878735073OAI: oai:DiVA.org:kth-121998DiVA: diva2:620012
FunderSwedish Research Council
QC 201305072013-05-072013-05-072015-09-22Bibliographically approved