Multiple laser beam combining and phasing using closed-loop control

Details Multiple laser beam combining and phasing using closed-loop control Multiple laser beam combining and phasing using closed-loop control

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993spie.1920....9n&link_type=abstract

Proc. SPIE Vol. 1920, p. 9-19, Active and Adaptive Optical Components and Systems II, Mark A. Ealey; Ed.

Computer Science

1

Scientific paper

One method for scaling lasers to higher power is to build several separate amplifier chains, and then coherently combine the individual beams together. To combine the beams the pathlengths must be matched to an integer number of waves, and the tip and tilt of each beam must be the same. Since optical tolerances are fractional micrometers, a sophisticated control system must be employed to actively measure tip/tilt and piston errors, and apply real time corrections. We have developed a test bed that allows us to develop the required control algorithms for two to four beams and then scale to a larger number.

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