All-optical logic OR gate using SOA and delayed interferometer

All-optical polarization-encoded negabinary signed-digit adder designs using terahertz-optical-asymmetric-demultiplexer switches

“…This is possible based on the nonlinear interaction of light waves with switching capability of more than 100 GHz (Mehra et al, 2012). For instance, various schemes such as ultra-fast nonlinear interferometric and interferometric wavelength converters (Garai & Mukhopadhyay , 2010), semiconductor optical amplifier (SOA) waveguide based on a Michelson interferometer (Wang et al, 2006), and MachZehnder interferometric (MZI) (Zhang et al, 2003) were reported. Further, optical gates based on terahertz optical asymmetric demultiplexing (TOAD) including SOA as the nonlinear element have attracted many interests due to its practical advantages (Li et al, 2007;Gayan et al, 2011;Dimitiadou & Zoiros, 2012).…”

All-optical negabinary adders using Mach–Zehnder interferometer

“…For the last three decades, developing parallel algorithms and/or architecture, which are most suitable for hybrid optoelectronics implementations were extensively explored. Nowadays, many researchers are even exploring all-optical implementations to avoid or eliminate the need to convert the optical signals to electronics signals and back to optical signals [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. The new motivation is mainly due to the development in nonlinear optical materials, which provide the major support for ultra-fast alloptical switches.…”

“…The new motivation is mainly due to the development in nonlinear optical materials, which provide the major support for ultra-fast alloptical switches. For instance, schemes such as ultra-fast nonlinear interferometric and interferometric wavelength converters, nonlinear optical loop mirror (NLOM), semiconductor optical amplifier (SOA) waveguide based on a Michelson interferometer (MI), and terahertz optical asymmetric demultiplexing (TOAD) were reported [7][8][9][10][11][12][13][14][15]. Further, optical gates based on MachZehnder interferometric (MZI) including SOA as the nonlinear element have attracted many interests due to its practical advantages [16][17][18][19][20].…”

Circuit designs of ultra-fast all-optical modified signed-digit adders using semiconductor optical amplifier and Mach–Zehnder interferometer

“…Nonlinear optical material provides the major support to optical switching, which is the base of all-optical logic and algebraic processing. For instance, schemes such as nonlinear optical loop mirror (NLOM), terahertz optical asymmetric demultiplexing (TOAD), semiconductor optical amplifier (SOA) waveguide based on a Michelson interferometer (MI), ultrafast nonlinear interferometric and interferometric wavelength converters were reported [26][27][28][29][30][31][32][33][34]. Further, optical gates based on Mach-Zehnder interferometric (MZI) and SOA as the nonlinear element have attracted much interest due to practical advantages [35][36][37][38][39][40].…”