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Proceedings Paper

Laterally coupled all solid state laser array with a three-mirror cavity
Author(s): Yuko Kono; Akira Nakanishi; Fumihiko Kannari
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Paper Abstract

A Nd:YAG microchip laser array is developed and the spatial phase correlation among each the microchip laser is attained utilizing the Talbot effect in a three-mirror cavity configuration. The laterally coupled Nd:YAG microchip laser array produces a pair of spots with angular separation of (lambda) /d in its far field, where d is the distance between the adjacent sources, corresponding to an out-of-phase spatial mode coupling. The far field spot size is reduced by a factor of 4.7 compared with that obtained by incoherent adding of the individual microchip lasers. Although an external mirror positioned at the 1/4 Talbot distance from the microchip lasers source is very effective to introduce the coherence among the laser chips, the present long Talbot distance limits the output laser power due to the extremely high diffraction loss in the auxiliary cavity. Smaller beam sizes for each microchip lasers will decrease the filling factor and improve the efficiency in the Talbot cavity.

Paper Details

Date Published: 13 May 1998
PDF: 8 pages
Proc. SPIE 3267, Laser Resonators, (13 May 1998); doi: 10.1117/12.308122
Show Author Affiliations
Yuko Kono, Keio Univ. (Japan)
Akira Nakanishi, Keio Univ. (Japan)
Fumihiko Kannari, Keio Univ. (Japan)

Published in SPIE Proceedings Vol. 3267:
Laser Resonators
Alexis V. Kudryashov; Pierre Galarneau, Editor(s)

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