文摘
The model discussed in this paper is of multiple optical logic gates in a single photonic circuit. NAND, AND, NOR, OR, XOR, XNOR, NOT gates are incorporated in the design. The outputs of these gates are on different wavelengths of conventional band, from 1550 to 1560 nm. The gates are achieved by using 2 脳 2 coupler with different coupling coefficient, multiplexer and the nonlinearities of SOA, which are otherwise regarded as demerit if SOA is used as an amplifier. The performance of the suggested model is analyzed through extinction ratio and quality factor, recorded for different values of length and confinement factor of SOA. Results of each individual gate are analyzed. The growth of all optical multiple logic functions onto a single chip is leading towards complex photonic computing and gradually eliminating the need for opto-electric conversions. Keywords Cross gain modulation (XGM) Cross phase modulation (XPM) Semiconductor optical amplifier (SOA) Optical logic gates