Efficient Yb: KGW lasers end-pumped by high-power diode bars
2006 (English)In: Applied physics. B, Lasers and optics (Print), ISSN 0946-2171, E-ISSN 1432-0649, Vol. 82, no 2, 235-239 p.Article in journal (Refereed) Published
The laser performance of Yb:KGW under end-pumping with high-power diode bars has been investigated. In one configuration, the pump is delivered through an optical fiber yielding a symmetric but unpolarized pump spot. In the second configuration, the pump is delivered through an optical lens system yielding a polarized but asymmetric pump spot. Both configurations resulted in a maximum optical to optical efficiency of 47% and a maximum power of 12.4 W has been generated with the fiber coupled pump source. The output power was limited by crystal fracture, which occurred at an estimated temperature gradient of 1.2 x 10(5) K/m. Thermal lensing and laser tuning characteristics are also investigated.
Place, publisher, year, edition, pages
2006. Vol. 82, no 2, 235-239 p.
Crystal structure; Laser tuning; Light polarization; Optical fibers; Optical instrument lenses; Optical pumping; Semiconductor diodes; Temperature control; High-power diode bars; Optical efficiency; Thermal lensing; Unpolarized pump spot; Semiconductor lasers
IdentifiersURN: urn:nbn:se:kth:diva-5455DOI: 10.1007/s00340-006-2171-8ISI: 000236750700013ScopusID: 2-s2.0-33645711196OAI: oai:DiVA.org:kth-5455DiVA: diva2:9825
QC 20100714. Uppdaterad från Accepted till Published 20100714.2006-03-132006-03-132014-11-06Bibliographically approved