Ultra-high-speed all-optical half subtractor for optical signal processing
摘要
All-optical half subtractor (AHS) is the very essential circuit to perform very-high speed operations in the present electronic world. The paper focuses on implementation of AHS by using photonic crystal (PhC) T-shaped waveguides. This structure works on beam interference pattern, and the output results are simulated using finite-difference time-domain method (FDTD). The suggested structure is of compact size of 27.72 μm2 and good contrast ratio (CR) of 15.79 for difference (Diff) and 11.22 for borrow (Borr) with the bit rate of 90.9 Tbps that can bring out in optical signal processing.