Independent phase and amplitude control of a laser beam by use of a single-phase-only spatial light modulator.
A phase-only spatial light modulator is used in conjunction with a spatial filter to provide independent control of the phase and amplitude of a laser beam. Continuous amplitude modulation of the beam is achieved with a resolution relevant to beam shaping of high-energy laser beams. Amplitude beam correction in a closed loop is demonstrated.
Bagnoud
Vincent
V
Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA. vbag@lle.rochester.edu
Zuegel
Jonathan D
JD