Mohamad Halim Abd Wahid

This work presents all-optical reversible gates based on semiconductor optical amplifier (SOA) in nonlinear loop optical mirror (NOLM). Two circuits namely Fredkin and Feynman logical operation are conducted and analyzed in terms of interferometric delay and bias currents of the SOA. The reversible gates are performed at 10 GHz data rate with narrow Gaussian pulses as input signals. Delay of 130 ps and injection current of 170 mA have displayed the finest outputs in the SOANOLM. Extinction ratio is greatly recorded, thus less noise interferes the logic operation in this simple technique. The SOANOLM also can be cascaded for other arithmetic signal processing units at high speed signal. Low power consumption at small signal gain has made the design versatile and viable to be implemented in photonic integration circuits for future ultrafast data handling over complex networks.

MATEC Web of Conferences, open access proceedings in Materials science, Engineering and Chemistry

MEMS parallel plate beam actuators can be comprehended within pull-in with the existence of an intermediate dielectric layer, which has a major outcome of the performance of such actuators. In this research, MEMS parallel plate actuator with an intermediate dielectric layer was simulated to study the relationship between pull-in voltage and thickness of the dielectric layer. Higher dielectric thickness gives more regular and predictable behavior, thus variable dielectric thickness was tested with a view to obtaining desired characteristic beyond pull-in. Many MEMS devices operate beyond pull-in, e.g., capacitive switches, zipper varactors, and coplanar waveguide (CPW) resonators. The actuator designed consists of two parallel plate electrodes with a dielectric layer in between, and dielectric layer with varying thickness were simulated using Intellsuite in order to observe pull-in voltage beyond 1µm displacement required