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All-optical 4-bit parity checker design

Srivastava V. K., Priye V.

Optica Applicata

2011

Vol. 41, nr 1

157--164

A new configuration of all-optical 4-bit parity checker is proposed that incorporates six semiconductor optical amplifiers (SOAs). The proposed 4-bit parity generator is numerically simulated by solving nonlinear coupled equations that explain the cross gain modulation (XGM) effect in individual SOAs. The full design is easy to understand. The outputs can be tested at every step with the help of waveforms. This makes easy error analysis of the circuit. The fault detection and correction can be made comfortably. This design proves that when we reach up to chip level design, the economical circuit is integration capable.

The Design of 4××4 4 Multimode Interference Coupler Based Microring Resonators on an SOI Platform

Le T.T., Cahill L. W.

Journal of Telecommunications and Information Technology

2009

nr 2

58-62

This paper would like to propose a novel microring resonator based on 4 ×4 multimode interference (MMI) couplers. The device acts as two separate microring resonators just in one structure. The transfer matrix method and the three dimensional beam propagation method (3D-BPM) are used to verify the working principle of the device. The device is then designed on silicon on insulator (SOI) technology. This device may be a very promising building block for optical switches, filters, add-drop multiplexers, delay lines and modulators.