In this paper, we proposed a novel all optical analog-to-digital (ADC) converter based on photonic crystals. First of all, designed three port nonlinear demultiplexer, for producing discrete levels input intensity. Then, an coder was used to generate 2-bit standard binary code out the coming from demultiplexer. The final structure realized by combining demultiplexer with coder. maximum sampling rate obtained be about 200 GS/s, and total footprint is 806 μm <sup...

In this study, an all optical 4‐to‐2 encoder have been proposed which has four input and three output ports. The structure can generate a 2‐bit binary code considering port is active. For realising the first authors designed BUFFER OR gate. Then combined these basic gates to realise encoder. maximum switching delay footprint for are about 200 fs 880 μm 2 , respectively.

In this paper, we aim to propose an optical structure for realizing half-adder operation without using the nonlinear Kerr effect. Constructive and destructive interference of beams is main working mechanism proposed structure. The phase difference required interface will be created by choosing different lengths input waveguides XOR gate. For structure, on-off contrast ratios SUM CARRY are 9.77 dB 6.98 dB, respectively. Also, delay time footprint about 4 ps 1056 μm2,

AbstractBased on photonic crystal ring resonators and nonlinear Kerr effect in this paper, we proposed a 2*4 all optical decoder switch. Our structure has two logic input ports one bias port. This switch four output ports. Via these ports, control the signal to transfer toward which We employed numerical methods such as plane wave expansion finite difference time domain for analyzing structure.Keywords: crystaloptical decoderphotonic band gapKerr

In this paper, we propose what believe is a novel all-optical analog-to-digital converter (ADC) based on photonic crystals. The proposed structure composed of nonlinear triplexer and an optical coder. for creating discrete levels in the continuous input signal, coder generating 2-bit standard binary code out coming from triplexer. Controlling resonant mode rings through intensity main objective working mechanism structure. maximum delay time obtained was about 5 ps total footprint 1520 μm2.

In this paper, we are going to design and propose a novel structure for all optical decoder. The proposed is composed of power splitters four-port switch. switch simply non-linear demulitiplexer. For achieving behaviour the demultiplexer, will employ defect rods made doped glass which has high Kerr coefficient. final three input ports four output ports. Port E acts as enable port, be used activating or deactivating total structure. A B control ports, by one can when active, port active....

In this paper combining a square lattice photonic crystal with 12-fold quasicrystal, we proposed new design for an optical channel-drop filter. Our structure has transmission efficiency very close to 1 and the band width quality factor values are 4.5 nm 344. After designing filter investigated effect of different parameters on output wavelength It been shown that by changing dielectric rods' refractive index, radius initial rods quasicrystal can obtain wavelengths