Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
Journal Home About Issues in Progress Current Issue All Issues Feature Issues

All-optical binary counter

Alistair Poustie, R. J. Manning, A. E. Kelly, and K. J. Blow

Open Access Open Access

Abstract

We experimentally demonstrate an all-optical binary counter composed of four semiconductor optical amplifier based all-optical switching gates. The time-of-flight optical circuit operates with bit-differential delays between the exclusive-OR gate used for modulo-2 binary addition and the AND gate used for binary carry detection. A movie of the counter operating in real time is presented.

©2000 Optical Society of America

Full Article  |  PDF Article
More Like This
All-optical ultrafast XOR/XNOR logic gates, binary counter, and double-bit comparator with silicon microring resonators

Purnima Sethi and Sukhdev Roy
Appl. Opt. 53(28) 6527-6536 (2014)

Digital optical counter using directional coupler switches

A. F. Benner, J. Bowman, T. Erkkila, R. J. Feuerstein, V. P. Heuring, H. F. Jordan, J. Sauer, and T. Soukup
Appl. Opt. 30(29) 4179-4189 (1991)

All-optical half adder using an SOA and a PPLN waveguide for signal processing in optical networks

Saurabh Kumar, Alan E. Willner, Deniz Gurkan, Krishnan R. Parameswaran, and Martin M. Fejer
Opt. Express 14(22) 10255-10260 (2006)

View More...

Supplementary Material (5)

Media 1: MOV (902 KB)     
Media 2: MOV (8564 KB)     
Media 3: MOV (938 KB)     
Media 4: MOV (3664 KB)     
Media 5: MOV (15100 KB)     

Cited By

Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (5)
Fig. 1.
Fig. 1. Logic diagram of the binary counter with bit-differential delay. The COUNT memory has a capacity of m bits and the CARRY memory has a capacity of m-1 bits. The delay for the link between the COUNT memory and the AND gate input is m bits. The delay for the link between the CARRY memory and the XOR gate input is m-1 bits. The optical pulses to be counted are input singly with a period of m bits.

Download Full Size | PDF

Fig. 2.
Fig. 2. Schematic diagram of the experimental all-optical counter architecture. The capacities of the COUNT and CARRY memory loops are 297 bits and 296 bits respectively (1ns per bit). Each TOAD contains an SOA, fibre couplers and fibre polarisation controllers as described in the text. DFB=gain-switched distributed feedback laser, I/P=input, O/P=output, EDFA=erbium doped fibre amplifier, EAM=electroabsorption modulator.

Download Full Size | PDF

Fig. 3.
Fig. 3. Full optical count field with the LSB on the RHS and the MSB on the LHS. The time separation between pulses is 1ns corresponding to the switching rate of 1GHz and the count rate is ~3.4MHz. The movie (902kb version, 8.57Mb version) shows the real time evolution of the binary count.

Download Full Size | PDF

Fig. 4.
Fig. 4. Optical count field from 221 (RHS) to 225 (LHS). The movie (938kb version, 3.67Mb version) shows the real time evolution of the binary count.

Download Full Size | PDF

Fig. 5.
Fig. 5. Optical count field from 212 (RHS) to 228 (LHS). The movie (15Mb) shows the real time evolution of the count from <228 to >229 that takes ~160s.

Download Full Size | PDF

Select as filters
Select Topics Cancel
Top
       
© Copyright 2024 | Optica Publishing Group. All rights reserved, including rights for text and data mining and training of artificial technologies or similar technologies.
Privacy | Terms of Use