Near-diffraction-limited segmented broad area diode laser based on off-axis spectral beam combining

Publication: Research - peer-reviewJournal article – Annual report year: 2006

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The beam quality of a 500-mu m-wide broad area diode laser with five active segments has been improved beyond the beam quality of the individual segments. The principle of this new laser system is based on off-axis feedback in combination with spectral beam combining. By using a double-feedback scheme we are able to improve the beam quality of the laser by a factor of 23 from M-2 = 55 for the free-running diode laser to M-2 = 2.4 for the laser with feedback at a drive current of 2.2 A. The improved M-2 value is a factor of 3.4 below M-2 = 8.2 for a single free-running segment. This is the first time that the beam quality of a segmented broad area diode laser has been improved beyond the beam quality of the individual segments.
Original languageEnglish
JournalApplied Physics B-Lasers and Optics
Volume83
Issue number2
Pages (from-to)225-228
ISSN0946-2171
DOIs
StatePublished - 2006
Peer-reviewedYes
CitationsWeb of Science® Times Cited: 8
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