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Information Technology Journal

Novel All-optical Flip-Flop using Dark-Bright Soliton Conversion Control

K. Luangxaysa, P. Phongsanam, Somsak Mitatha, Masahiro Yoshida, Noriyuki Komine, Preecha P. Yupapin

Published Jul 4, 2012• 11 citations
Publisher
DOI
10.3923/itj.2012.1470.1476

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A method of optical cryptography by using soliton as dark-bright conversion control within a modified add/drop optical filter is proposed.In principle, the coincidence (orthogonal) dark-bright soliton pair has shown promising behaviors, especially when they propagate into the π2 phase shifter, i.e. beamsplitter, π2 phase shift between bright and dark solitons is occurred and separated.Such behaviors can be used to form the orthogonal light modes (solitons), which can be useful for application of cryptography, where in this case the long distance cryptography can be easily managed.In this work we have derived and presented a concept of multi-orthogonal solitons generated by using dark-bright soliton pulses within the modified add/drop optical filter, which is known as a PANDA ring resonator.A pair of optical keys is randomly generated and transmitted into the transmission line, where finally the corrected keys between Alice (sender) and Bob (receiver) can be retrieved.By using the dark-bright soliton conversion control, the obtained output of the dynamic states can be used to randomly form the multi-orthogonal soliton pairs, which can be available for computer and communication security applications, especially for long distance link.
A new method of optical cryptography using dark-bright soliton conversion control within a modified add/drop optical filter is proposed. A pair of optical keys is randomly generated and transmitted into the transmission line, where finally the corrected keys between Alice (sender) and Bob (receiver) can be retrieved. In principle, the coincidence (orthogonal) dark-bright soliton pair has shown promising behaviors, especially when they propagate into the π/2 phase shifter, i.e. beamsplitter, the shift in phase of π/2 between dark and bright solitons is occurred and separated. Such behaviors can be used to form the orthogonal light modes (solitons), which are useful for cryptographic application, where in this case the long-distance cryptography can be easily managed. We have derived and presented a new concept of multi-orthogonal solitons generated by using dark-bright soliton pulses within the modified add/drop optical filter, which is known as a PANDA ring resonator. By using the dark-bright soliton conversion control, the obtained output of the dynamic states can be used to randomly form the multi-orthogonal soliton pairs, which can be available for computer and communication security applications, especially for long-distance link.
We propose a new system of an all optical switching system using an optical add/drop filter consisting of two nano ring resonators. The dynamic behavior of dark-bright soliton collision within the modified add/drop optical filter device, which it is known as PANDA ring resonator. By using the dark-bright soliton conversion control within the PANDA ring, the obtained output signals can be attenuated and used to perform the single photon switching, which is capable for security code application. Results obtained have shown that the random binary codes based on a single photon switching can be formed by using the polarized light components, dark and bright solitons, whereas the single photon switching codes can be obtained by using the attenuated dark-bright soliton conversion signals output signals.