An all-optical adder/subtractor (A/S) unit with the help of terahertz optical asymmetric demultiplexer (TOAD) is proposed. The all-optical A/S unit with a set of all-optical full-adders and optical exclusive-ORs (XORs), can be used to perform a fast central processor unit using optical hardware components. We try to exploit the advantages of TOAD-based optical switch to design an integrated all-optical circuit which can perform binary addition and subtraction. With computer simulation results confirming the described methods, conclusions are given.
© 2009 Chinese Optics Letters
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.4510) Fiber optics and optical communications : Optical communications
(200.4560) Optics in computing : Optical data processing
(220.4830) Optical design and fabrication : Systems design
(230.4320) Optical devices : Nonlinear optical devices
Dilip Kumar Gayen, Rajat Kumar Pal, and Jitendra Nath Roy, "All-optical adder/subtractor based on terahertz optical asymmetric demultiplexer," Chin. Opt. Lett. 7, 530-533 (2009)