A very fast (>100 kHz) acousto-optic scanning system, which relies on two counterpropagating acoustic waves with the same frequency modulation, is proposed and experimentally demonstrated. This scheme completely suppresses linear frequency chirp and thus permits very fast nonlinear scans and nonconstant linear scans. By changing the phase between the modulating signals, this scheme also provides very fast longitudinal scans of the focal point.
© 2000 Optical Society of America
(050.1590) Diffraction and gratings : Chirping
(070.1060) Fourier optics and signal processing : Acousto-optical signal processing
(120.5800) Instrumentation, measurement, and metrology : Scanners
(230.1040) Optical devices : Acousto-optical devices
Nir Friedman, Ariel Kaplan, and Nir Davidson, "Acousto-optic scanning system with very fast nonlinear scans," Opt. Lett. 25, 1762-1764 (2000)