Generalized optical logic elements – GOLEs

Channel routing for integrated optics

“…The main motivation for solving this problem stems from physical design of integrated optical logic circuits [6], [7], [10], [16]. Such circuits comprise a set of pre-designed optical devices -such as modulators, switches, splitters and detectors -placed on a planar substrate, and connected together with waveguides.…”

“…At the functional/logic-design level, there have been investigations into use of optical components as building-blocks, connected by waveguides, to design optical computing systems [6], [8], [10], [16], [26], [27]. High-level synthesis, using technologymapping with a library of optical device building-blocks, has also been presented [11].…”

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

“…Thus, the outputs T 0 , T 1 , T 2 , and T 3 will represent the outputs of two binary variables minterms m 0 , m 1 , m 2 , and m 3 , respectively. In addition, the switches of Recently, Caulfield et al [22] discussed and introduced a concept for a general optical logic element (GOLE) to implement any logical function. The GOLE is a device that performs any of the 16 Boolean logic operations on two optical signals with very fast switching functionality.…”

“…Nowadays, ultra-fast and all-optical processors are becoming very demanding in the high-capacity core networks to avoid optoelectronics conversions. To accommodate high data rates, one needs to avoid or eliminate the need to convert the optical signals to electronics signals and back to optical signals [21][22][23][24][25]. Recently, the development of different ultra-fast and all-optical switches has received considerable interest allover the world for future optical computing and optical information processing [21][22][23][24][25].…”

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.…”