A New Two-Dimensional Photonic Crystal Channel Drop Filter Based on Two-Resonant Cavities

In this paper, a channel drop filter (CDF) is composed of two cubic lattice circular ring resonator cavities and point micro-cavities in a two-dimensional photonic crystal. The photonic band gap is calculated using the plane wave expansion (PWE) method and the optical characteristics of proposed structure are studying by the finite difference time domain (FDTD) method with perfectly matched layers (PMLs) acting as the boundary conditions . Two different wavelengths centered at 1773 nm and 1742 nm have been successful separation in this CDF. These demonstrate that our proposed structure is suitable for photonic integrated circuits (PICs) and coarse wavelength division multiplexing (WDM) optical communication systems.

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A New Two-Sided Coupling Channel Drop Filter Based on a Two-Dimensional Photonic Crystal

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.760-762.417 ◽

2013 ◽

Vol 760-762 ◽

pp. 417-420

Author(s):

Xiang Nan Zhang ◽

Gui Qiang Liu ◽

Ying Hu ◽

Zheng Jie Cai ◽

Yuan Hao Chen

Keyword(s):

Photonic Crystal ◽

Integrated Circuits ◽

Wavelength Division Multiplexing ◽

Communication Systems ◽

Light Propagation ◽

Fdtd Method ◽

Two Dimensional ◽

Perfectly Matched Layers ◽

Coupling Channel ◽

Micro Cavity

We design a new two-sided coupling channel drop filter (CDF) based on a two-dimensional (2D) photonic crystal (PC). Three channels formed by line defects for light propagation, two L4 resonators positioned at both sides of the input waveguide for light coupling, and one point defect micro-cavity in the bus waveguide for wavelength-selective reflection are introduced into the PC structure. The optical characteristics of this proposed structure are calculated by finite-difference time-domain (FDTD) method combined with the perfectly matched layers (PMLs) as the boundary conditions. Three wavelengths centered at 1550, 1575 and 1610 nm within the limit of communication windows are successfully separated in three channels by adjusting the size of coupling rods and the positions of L4 resonators and micro-cavity. High transmission efficiency and more than 20 nm channel spacing are achieved. These demonstrate that our proposed structure is suitable for photonic integrated circuits (PICs) and coarse wavelength division multiplexing (WDM) optical communication systems.

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Tunable High Performance 16-Channel Demultiplexer on 2D Photonic Crystal Ring Resonator Operating at Telecom Wavelengths

Journal of Optical Communications ◽

10.1515/joc-2017-0199 ◽

2018 ◽

Vol 0 (0) ◽

Cited By ~ 5

Author(s):

S. Naghizade ◽

S. M. Sattari-Esfahlan

Keyword(s):

Photonic Crystal ◽

Wavelength Division Multiplexing ◽

High Performance ◽

Ring Resonator ◽

Photonic Band Gap ◽

Fdtd Method ◽

Two Dimensional ◽

Dimensional Photonic Crystal ◽

Two Dimensional Photonic Crystal ◽

Photonic Crystal Ring Resonator

AbstractHere, we proposed a high performance 16-channel optical demultiplexer using two-dimensional photonic crystal ring resonator for telecommunication systems. By plane wave expansion (PWE) method the photonic band gap (PBG) of proposed structure calculated. Then, with finite difference time domain (FDTD) method the performance parameters of designed two-dimensional photonic crystal demultiplexer are analyzed. It is found that the channel wavelength of wavelength-division multiplexing (WDM) is truly tuned by changing the structure parameters of the demultiplexer and position of rod. Output peaks located in the optical communication C-band and L-band with the transmission efficiency of 99 %. The demultiplexer exhibits high-quality factor of 5176, and spectral width of 0.3. Very low crosstalk values are between −19 dB and −90 dB where, device only occupies an area of 1708.65 µm2. The proposed compact 16-channel demultiplexer can find more applications for the ultra-compact WDM systems in highly integrated telecommunication circuits.

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Design and optimization of two dimensional photonic crystal based optical filter

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863515500277 ◽

2015 ◽

Vol 24 (03) ◽

pp. 1550027 ◽

Cited By ~ 10

Author(s):

G. Rajalakshmi ◽

A. Sivanantha Raja ◽

D. Shanmuga Sundar

Keyword(s):

Refractive Index ◽

Photonic Crystal ◽

Transmission Spectrum ◽

Filter Design ◽

Photonic Band Gap ◽

Fdtd Method ◽

Optical Filter ◽

Two Dimensional ◽

Dimensional Photonic Crystal ◽

Two Dimensional Photonic Crystal

In this paper, the channel drop filter based on two dimensional photonic crystal is proposed. The structure is made of silicon rods with the refractive index n1 = 3.4641 which are perforated in air with refractive index n2 = 1. The simulation results are obtained using 2D finite difference time domain (FDTD) method. The photonic band gap is calculated by plane wave expansion solver method. Resonant mode of the ring resonator and the filter transmission spectrum is calculated using 2D FDTD method. Full width half maximum (FWHM) bandwidth of the filter at the output transmission spectrum from 1.508 μm to 1.512 μm is 4 nm. The quality factor of the filter is 377.5 and the proposed filter design is around 21 × 15 μm which is suitable for photonic integrated circuits.

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