Abstract
In conventional method, 2's complement number conversion can be easily done by adding a binary bit ‘1’ with 1's complement of any binary number. In this study, the authors have proposed a new method where no addition is required. Also, an all-optical n-bit conversion circuit has been proposed here. The authors have used logic sum and binary XOR operation to build their design. Optical logic sum circuit can be easily designed with an N × 1 beam combiner. Also, binary XOR operation has been designed with a Mach–Zehnder interferometer (MZI) having quantum dot semiconductor optical amplifier placed in each arm. The novelty of this circuit is that they required only one MZI to design it. To get the proper result and performance of the circuit, numerical simulations have been done.
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