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Proceedings Paper

Phase locking of laser diode arrays using a photorefractive Rh:BaTiO-3 crystal
Author(s): Paul Michael Petersen; Peter Snoer Jensen; Per Michael Johansen
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Paper Abstract

We have developed an extremely stable phase conjugate single-mode laser diode array with unique spatial and temporal coherence properties. The laser is based on a novel concept of frequency selective phase conjugate feedback. A laser diode array is coupled to the phase conjugate feedback system that comprise a rhodium doped BaTiO3 crystal, a Fabry-Perot etalon, and a spatial filter. This feedback system forces the laser diode array to operate in a single spatial and a single longitudinal mode. In comparison with the free running laser diode array, the coherence length is increased significantly and the output is close to the diffraction limit. More than 80% of the total energy provided by the free running laser diode array can be extracted from this single-mode laser system.

Paper Details

Date Published: 24 May 1999
PDF: 5 pages
Proc. SPIE 3611, Laser Resonators II, (24 May 1999); doi: 10.1117/12.349253
Show Author Affiliations
Paul Michael Petersen, Risoe National Lab. (Denmark)
Peter Snoer Jensen, Risoe National Lab. (Denmark)
Per Michael Johansen, Risoe National Lab. (Denmark)

Published in SPIE Proceedings Vol. 3611:
Laser Resonators II
Alexis V. Kudryashov, Editor(s)

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