Implementation of all-optical synchronous and asynchronous binary up counters using silicon micro-ring resonator

Abstract

All-optical synchronous and asynchronous binary up counters that employ silicon micro-ring resonator-based T flip-flops are proposed. An alternative approach to design all-optical synchronous and asynchronous binary up counters is also demonstrated using fewer optical components. The proposed design is theoretically realized in MATLAB simulation software at a very high operational speed of 260 Gbps. The performance of this design is validated through amplitude difference, contrast ratio, extinction ratio, amplitude modulation, on-off ratio, etc. The optimized values of the micro-ring resonator are achieved through numerical simulation, which will help to implement the proposed design practically.

Design and analysis of all-optical carry lookahead adder using microring resonator in Z-domain

“…Other parameters are similar as in Ref. 23 except the MRR effective cross-sectional area and pump power.…”

“…1. 23 The IPs are an IP and an add port. The output ports are a through port (TP) and a drop port (DP).…”

“…For our design, MRR consists of two straight waveguides with four ports, among which two ports are input ports (IPs) and two ports are output ports, as shown in Fig. 1 23 . The IPs are an IP and an add port.…”

Modelling of all optical synchronous up-counter using microring resonator

“…1-bit delay element been added to MRR2 and MRR4 to provide for feedback. The signal which is feedback from the through port is for the purpose of making the previous output to be present at the add port, to attain the same for the present output in case the CLK is not active 17,18 .…”

“…MRRs were preferred because the signal is carried in the form of photons only and it also has several advantages like miniaturized ring dimensions, lesser complex circuit, has narrow band, has high wavelength selectivity, and large free spectral range. Using MRRs a number of logic circuits like universal logic gates 1,[9][10][11] , combinational circuits like sequence generator 12 , multiplexer 13,14 , comparators 15 and sequential circuits like flip-flops 16 , counters 17,18 , reversible logic gates 19,20 , ALU reconfigurable logic operations 21 , etc. have been devised.…”