Collective phase measurement of an array of fiber lasers by quadriwave lateral shearing interferometry for coherent beam combining
Optics Letters, Vol. 35, Issue 23, pp. 3931-3933 (2010)
http://dx.doi.org/10.1364/OL.35.003931
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Abstract
We present a new configuration of quadriwave lateral shearing interferometer dedicated to phase detection for beam-combining purposes. Assuming that the fibers are disposed in a matrix arrangement, our scheme gives direct access to the phase step between adjacent fibers in two dimensions. Experimentally recorded interferograms are made only of two-wave interference fringes that scroll as the phase evolves in the fibers. This simplicity allows fast treatment by the spatial demodulation process, and the phase map from the fibers can be estimated in real time. No external reference is required, and the technique is fully compatible with a high number of fibers.
© 2010 Optical Society of America
OCIS Codes
(050.5080) Diffraction and gratings : Phase shift
(100.5070) Image processing : Phase retrieval
(140.3298) Lasers and laser optics : Laser beam combining
ToC Category:
Lasers and Laser Optics
History
Original Manuscript: July 26, 2010
Revised Manuscript: October 11, 2010
Manuscript Accepted: October 27, 2010
Published: November 22, 2010
Citation
C. Bellanger, B. Toulon, J. Primot, L. Lombard, J. Bourderionnet, and A. Brignon, "Collective phase measurement of an array of fiber lasers by quadriwave lateral shearing interferometry for coherent beam combining," Opt. Lett. 35, 3931-3933 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-23-3931
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