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750 nm 1.5 W frequency-doubled semiconductor disk laser with a 44 nm tuning range

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Original languageEnglish
Pages (from-to)4380-4383
Number of pages4
JournalOptics Letters
Issue number19
Publication statusPublished - 1 Oct 2015
Publication typeA1 Journal article-refereed


We demonstrate 1.5 W of output power at the wavelength
of 750 nm by intracavity frequency doubling a wafer-fused
semiconductor disk laser diode-pumped at 980 nm. An
optical-to-optical efficiency of 8.3% was achieved using a
bismuth borate crystal. The wavelength of the doubled
emission could be tuned from 720 to 764 nm with an intra-
cavity birefringent plate. The beam quality parameter M2
of the laser output was measured to be below 1.5 at all
pump powers. The laser is a promising tool for biomedical
applications that can take advantage of the large penetra-
tion depth of light in tissue in the 700–800 nm spectral

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