Designing an ultracompact all-optical 4-to-2 encoder and investigating its optical power consumption

Abstract

In this paper, an ultracompact all-optical encoder based on a photonic crystal nanoresonator was designed. The proposed structure consists of several waveguides and two nanoresonators. The nanoresonators were designed by reducing the radius of the dielectric rods. To analyze the all-optical encoder, plane-wave expansion and finite-difference time-domain methods were, respectively, applied to calculate the bandgap diagram and to obtain the transmission and propagation of optical field. The contrast ratio, delay time, data transfer speed, and total footprint of the logic gate equaled 9.51 dB, 0.24 ps, 4.16 Tb/s, and 148 µ m 2 , respectively. In addition to these parameters, two new parameters were investigated: the range of optical power required, and the frequency range for better logic gate efficiency. Due to the ultracompacted size, low power consumption, low delay time, and simplicity of structure, this all-optical encoder is suitable for use in low-power optical integrated circuits.

Energy‐Saving High‐Bandwidth Perovskite Sub‐Micro‐Encoder

“…the light beam is encoded by dynamically modulating the optical parameters of the light beam, such as light intensity, [4][5][6][7] optical mode, [8,9] optical phase, [10,11] and polarization, [12,13] or a combination of these parameters. [14] In the two-step coding method, the energy consumption per code inherently exceeds the power intensity of the basic light beam, even though code "0" may correspond to a low-intensity state prepared by weakening the basic light beam at the second coding step (see Figure 1).…”

Proposal of a Cascade Photonic Crystal XOR Logic Gate for Optical Integrated Circuits with Investigation of Fabrication Error and Optical Power Changes

“…The footprint and the amount of optical power or output intensity [21] are also important factors in evaluating the performance of logic gates. Because the purpose of designing logic gates is to achieve all-optical integrated circuits, designing a logic gate with a smaller size is more suitable for integrated circuits.…”

Energy-saving High-bandwidth Perovskite Nano-encoder

“…For the optical coding process, the energy consumption efficiency is closely related to the coding method. Conventional optical coding (COC) includes two main steps: first, a basic light beam serving as the host of optical codes is introduced, and second, the light beam is encoded by dynamically modulating the optical parameters of the light beam, such as the light intensity [4][5][6][7] , optical mode 8,9 , optical phase 10,11 and polarization 12,13 , or their combinations 14 . In the two-step coding method, the energy consumption per code inherently exceeds the power intensity of the basic light beam, even though code "0" may correspond to the low-intensity state prepared by weakening the basic light beam at the second coding step (Fig.…”