Open AccessAll-optical decrementing of a packet’s time-to-live (TTL) field using logic XOR gates
Author(s) -
Ruth Vilar,
J.M. Martínez,
F. Ramos,
J. Martí
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.019734
Subject(s) - extinction ratio , subtractor , optics , xor gate , computer science , logic gate , physics , cascade , astronomical interferometer , network packet , interferometry , optoelectronics , algorithm , wavelength , adder , cmos , engineering , computer network , chemical engineering
A novel optical time-to-live (TTL) method based on the use of logic XOR gates is proposed. All-optical decrementing of a packet's TTL field is demonstrated employing a cascade of two SOA-based Mach-Zehnder interferometers. The principle of operation is validated by means of simulations, showing a good extinction ratio (higher than 10 dB) at the output of the 1-bit subtractor.