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Proceedings Paper

Demonstration of all-optical two bit digital comparator using self-locked Fabry-Perot laser diode
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Paper Abstract

All-optical two bit digital comparator using single mode Fabry-Perot laser diodes (SMFP-LDs) is proposed and demonstrated with 10 Gbps PRBS signal of 231-1. Digital comparators are one of the important components for decision making circuits, threshold detection, which are used in optical signal processing and optical computing. The basic principle of the comparator is based on injection locking, multi-input injection locking and combinational input injection locking (CMIL) to realize the greater than, less than, and equal to function of the basic comparator circuit. These principles are used to realize the different optical logic gates which are combined together to demonstrate optical comparator with the minimum number of components, making the configuration cheaper and simpler. The proposed method draws less current and hence power effective too. Output waveform diagram and output eye diagram for all three cases of comparator are presented to verify all functions of all-optical comparator.

Paper Details

Date Published: 2 March 2012
PDF: 6 pages
Proc. SPIE 8257, Optical Components and Materials IX, 82570S (2 March 2012); doi: 10.1117/12.906954
Show Author Affiliations
Bikash Nakarmi, KAIST (Korea, Republic of)
M. Rakib-Uddin, KAIST (Korea, Republic of)
Yong Hyub Won, KAIST (Korea, Republic of)

Published in SPIE Proceedings Vol. 8257:
Optical Components and Materials IX
Shibin Jiang; Michel J. F. Digonnet; J. Christopher Dries, Editor(s)

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