Abstract
Abstract In the paper, one input optical gates i.e., INVERTER and BUFFER have been designed using some basic assumption to analyze with the help of Semi-conductor Optical Amplifier based Mach–Zehnder Interferometer structure. The results are optimized by iterative process. The proposed design of optical gates presents low complexity, high scalability and more feasible to evaluate through digital Boolean analyzation. The digital Boolean analyzation is analyzed by some basic Boolean rules and assumptions which makes the design more digital so that it can be compatible for more than one input optical gates also. Optical Gate is designed to get constructive and destructive interference for pump and probe as they are injected into SOA simultaneously. The phase modulation is converted into intensity modulation which gives a Boolean result. The paper is optimized by Eye diagram, Q factor, wavelength spectrum and frequency chirp for both the gates. The comparative results of extinction ratio for both the gates have also been discussed. The design is supported by theoretical analysis, simulation tool (Optsim) and Boolean explanation. The proposed designs are constructed with same pattern which supports the same Boolean analysis.
Highlights
An optical fiber communication system is similar to any other communication system
In the paper, one input optical gates i.e., INVERTER and BUFFER have been designed using some basic assumption to analyze with the help of Semiconductor Optical Amplifier based Mach–Zehnder Interferometer structure
The proposed model of INVERTER/BUFFER gates, as in Figure 1 consists of a symmetrical Mach–Zehnder Interferometer (MZI) where the two semiconductor optical amplifier (SOA) are placed in series with multiplexer at the upper and lower arm of Mach–Zehnder interferometer (MZI)
Summary
An optical fiber communication system is similar to any other communication system. The commercial demand for higher capacity transmission is needed to introduce a new information service and broadband service. All-optical logic gates are in category of ultra-fast switching device that can perform a Boolean operation in compact integration circuit [1,2,3]. Recent optical digital system operation is based on digital logic design [7] To setup this technology it is important to develop basic Boolean function such as optical gates which can operate at high speed. We have done comparative study of one input gates i.e., BUFFER and INVERTER [17, 18] with the help of two SOAs in MZI structure that made it possible to use its nonlinearity for gates. It still appears as T-port giving the INVERTER/BUFFER operation as (01000001001000001001)/(01000001001000001001)
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