Proposal for all Optical Memory Unit and Phase Key Recovery using Fabry-Perot Narrowband Filters

The current technologically vibrant world is demanding more data transfer, data communications and optical computing. Main focus areas are high-definition internet video streaming, image processing, sensing applications, distance learning and in cloud computing. Since last decade we use optical communication technologies for above mentioned bandwidth hungry applications. The biggest advantage of processing the information in the all-optical domain is the availability of huge bandwidth and of course it's ultrahigh processing speeds even for future technologies including 5G. Fiber Bragg grating is widely used for filtering and sensing applications. In order to meet with the high bandwidth requirements for the applications mentioned above, the fiber Bragg gratings are replaced with ultra-narrowband filters like Fabry-Perot filters using fiber Bragg gratings. This article reports a Fabry-Perot narrow band filter using fiber Bragg grating (FP-FBGs) can be designed for all optical memory unit and for detecting the phase keys encrypted in the optical intensity waveforms. All optical integrators are used for both these applications. We also report here the phase key decryption by inputting Double Gaussian to an optical integrating circuit. The optical encryption methods are getting very much attraction in the present days. In order to overcome the fabrication difficulty for optical data encoding in both amplitude and phase regimes, here we propose the decrypting phase keys method where the data is entirely in phase only domain.