Application of photonic crystal based nonlinear ring resonators for realizing all optical 3-to-8 decoder

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Alidoost Rostamizadeh ◽  
Mehdi Taghizadeh ◽  
Jasem Jamali ◽  
Alireza Andalib
Keyword(s):  
Time Domain ◽  
Finite Difference Time Domain ◽  
Design Procedure ◽  
Ring Resonators ◽  
Two Dimensional ◽  
Maximum Delay ◽  
All Optical ◽  
Simulation Results ◽  
Difference Time ◽  
Optical Decoder

AbstractOptical decoders are required for optical routing. In this paper we presented the design procedure and simulation results for 3-to-8 optical decoder, which was designed using nonlinear ring resonators inside two dimensional photonic crystals. The proposed structure was simulated using finite difference time domain method. Based on the simulation results the maximum delay time of the structure is about 2 ps. Also the worst transmission values for logic 0 and 1 are 10% and 78%, respectively.

Compact and ultrafast all optical 1-bit comparator based on wave interference and threshold switching methods

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Asghar Askarian
Keyword(s):  
Finite Difference Time Domain ◽  
Contrast Ratio ◽  
Logical Structure ◽  
Ring Resonators ◽  
Plane Wave Expansion ◽  
Threshold Switching ◽  
Wave Interference ◽  
All Optical ◽  
Fdtd Methods ◽  
Difference Time

Abstract In this study, we are going to design all optical 1-bit comparator by combining wave interference and threshold switching methods. The final structure composed of two nonlinear ring resonators and seven waveguides. The functionality of the suggested logical structure is analyzed and simulated by using plane wave expansion (PWE) and finite difference time domain (FDTD) methods. According to results, the proposed all optical 1-bit comparator has faster response and smaller footprint than all previous works. The maximum ON-OFF contrast ratio, delay time and area of the suggested optical comparator are about 16.67 dB, 1.8 ps, and 513 µm2, respectively.

Angle Sensor Based on Golden Spiral–Shaped Tapered Ring Resonator Using Finite Difference Time-Domain Method

2015 ◽  
Vol 781 ◽  
pp. 462-465 ◽  
Author(s):  
S. Harnsoongnoen ◽  
U. Charoen-In ◽  
S. Pattitanang ◽  
C. Auntarin ◽  
N. Angkawisittpan
Keyword(s):  
Finite Difference ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Dynamic Range ◽  
Time Domain Method ◽  
Ring Resonators ◽  
Small Scale ◽  
Angle Sensor ◽  
Domain Method ◽  
Difference Time

In this paper, an angle sensor based on coplanar waveguides (CPWs) loaded with golden spiral–shaped tapered ring resonators (GS-RRs) is proposed. The E-fields and H-fields of the GS-RRs were simulated and analyzed using finite difference time-domain method (FDTD). It is shown that the proposed sensor has a high dynamic range and linearity for rotation sensing. The proposed sensor can be operated at a single fixed resonant frequency (6.32 GHz) which is inexpensive and probably for superior interest in a small scale structure using MEMS technology.

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