Monish Chatterjee

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A novel technique involving nonlinear dependent sources expressed as convergent power series expansions of one or more variables representing the output fields of a Bragg-domain hybrid acousto-optic device with feedback is presented. Using some straightforward modifications of a basic circuit prototype, we show how optical bistability, possible(More)
Recent research work reveals that the performance of translucent optical network is very near to fully opaque network but much better than transparent network in terms of cost and overall blocking. A translucent optical network is capable to reduce the network design cost as well as routing cost by dividing each light-path into one or limited number of(More)
A detailed examination of the nonlinear dynamical behavior of an acousto-optic Bragg cell in the near-Bragg regime of operation for the case of four scattered orders under intensity feedback is carried out. This problem is an extension of the standard ideal-Bragg feedback model whereby traditionally bistability, hysteresis, and chaotic oscillations are(More)
We discuss the design of an acousto-optic cell based free space optical communication link where the data beam is made secure through chaos encryption. Using external signal modulation of the diffracted light from a hybrid acousto-optic cell chaos (or directly via incorporation in the sound-cell driver’s bias voltage) encryption of data is possible. We have(More)
Traffic grooming in WDM optical networks is a scheme for aggregating several low-speed traffic streams from users onto a high-speed lightpath. In such networks, an optical fiber carries a large number of lightpaths and each individual lightpath carries the traffic of a large number of connection requests. So the failure of a single fiber-link, even for a(More)
Electrocardiography (ECG) signals are used for both medical purposes and identifying individuals. It is often necessary to encrypt this highly sensitive information before it is transmitted over any channel. A closed-loop acousto-optic hybrid device acting as a chaotic modulator is applied to ECG signals to achieve this encryption. Recently improved(More)
The characteristics of a dual-input hybrid acousto-optic device are investigated numerically and experimentally. The device, which operates as a set-reset flip-flop, uses the well-known bistable acousto-optic device with feedback to which two input beams are applied. The resulting flip-flop is analyzed numerically by use of nonlinear dynamical and nonlinear(More)
Traffic grooming schemes have attracted a lot of research attention for addressing the bandwidth mismatch between low data-rate user connection requests and a high capacity lightpath. Survivability of individual user connections is also highly important. The problem of survivable traffic grooming is known to be NP-Complete. In this paper we suggest(More)