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A 1.5-W frequency doubled semiconductor disk laser tunable over 40 nm at around 745 nm

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Original languageEnglish
Title of host publicationProceedings of SPIE
Subtitle of host publicationVertical External Cavity Surface Emitting Lasers (VECSELs) VI
Number of pages8
Publication statusPublished - 2016
Publication typeA4 Article in a conference publication
EventSPIE Photonics West -
Duration: 1 Jan 1900 → …

Publication series

NameSpie conference proceedings
ISSN (Electronic)0277-786X


ConferenceSPIE Photonics West
Period1/01/00 → …


1.5 W of output power was obtained in the challenging wavelength range between 700 and 800 nm by frequency doubling a wafer-fused 1.49-μm semiconductor disk laser pumped with 980-nm diodes. A bismuth borate crystal was used for doubling the frequency. A total optical-to-optical efficiency of 8.3 % was achieved. The laser was tunable from 720 to 764 nm with an intracavity birefringent plate. The beam quality parameter M2 remained below 1.5 at all power levels. The laser is attractive for biomedical applications such as photodynamic therapy that benefit from the low absorption of light in tissue in this spectral range.

Publication forum classification

Field of science, Statistics Finland