10-Gb/s All-Optical Half-Adder With Interferometric SOA Gates

Realization of High Speed All-Optical Half Adder and Half Subtractor Using SOA Based Logic Gates

“…Half adder and half subtractor are combinational circuits capable of adding and subtracting two single bit numbers respectively and of producing outputs as sum and carry for an addition operation, difference and borrow for subtraction [3,4]. The truth table of the half adder and half subtractor is shown in Table 1 with required logic gate operation necessary to implement its function.…”

“…Several methods of designing all-optical half adder & half subtractor have already been demonstrated by various researchers using nonlinear optics [2][3][4]. Of the many nonlinear technologies investigated, semiconductor-based technologies are the most promising.…”

Semiconductor optical amplifiers: performance and applications in optical packet switching [Invited]

“…Realization of optical half [52,53] and full [54] adders, incorporating AND, OR, and XOR functions have been shown and can be seen to have packetheader recognition applications. Header extraction and processing techniques have been able to make use of the SOA's birefringence to manipulate signal polarization states in order to facilitate the required optical logic functions [55,56].…”

Method of implementation of frequency encoded all optical half adder, half subtractor and full adder based on semiconductor optical amplifiers and add drop multiplexers

“…Optical half subtractor finds applications in encryption and decryption of cryptographic data and dual direction binary counters. Various designs of optical half adder [9][10][11][12][13][14], half subtractor [13] have been proposed. They are basically using two semiconductor optical amplifiers (SOAs) in a loop mirror (SLALOMs) [9], one acts as AND gate and other as an X-OR gate, employing three terra hertz optical asymmetric demultiplexer (TOADs) [10], one acting as AND gate and other two as X-OR gate, using four SOAs [11], using periodically poled lithium E-mail address: lipton@indiatimes.com.…”