A technique for high-speed, all-optical pattern recognition based on cross correlation in a segmented semiconductor optical amplifier (SSOA) is presented. A counterpropagating pump–probe setup is used to perform cross correlation of the spatial gain–loss pattern in the SSOA with the optical data pattern (pump), and the result is read out with a counterpropagating probe. Cross correlation of 4-bit patterns at 85 Gbits/s is experimentally demonstrated. Simulations show reasonable agreement with experimental measurements and are used to address scalability to higher bit rates and longer data patterns.
© 2001 Optical Society of America
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(070.4550) Fourier optics and signal processing : Correlators
(190.0190) Nonlinear optics : Nonlinear optics
(190.5970) Nonlinear optics : Semiconductor nonlinear optics including MQW
P. Petruzzi, C. J. K. Richardson, M. Van Leeuwen, N. Moulton, P. Heim, M. Dagenais, and J. Goldhar, "Optical pattern recognition by use of a segmented semiconductor optical amplifier," Opt. Lett. 26, 1248-1250 (2001)