Channel Drop Filter Application of 2-D Photonic Crystal (original) (raw)
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An optical channel drop filter based on 2D photonic crystal ring resonator
Journal of Electromagnetic Waves and Applications, 2016
In this paper, we propose a new design of T-shaped channel drop filter using photonic crystal ring resonator. The proposed structure is composed of two photonic crystal waveguides and a square photonic crystal ring resonator with circular inner rods configuration. Calculations of band structure and normalized transmission spectra are done by plane wave expansion (PWE) and finite difference time domain (FDTD) methods, respectively. According to the results, we note that 100% dropping efficiency with quality factor of 502 is achievable at wavelength λ=1.578487 μm. The effect of varying different parameters on the resonant wavelength and dropping efficiency of the filter is investigated. These parameters include refractive index, radius of inner and whole rods.
T-shaped channel-drop filters using photonic crystal ring resonators
Physica E: Low- …, 2008
In this paper, we demonstrate a new type of 2D photonic crystal T-shaped channel-drop filters based on ring resonators with high normalized transmission; we investigate parameters which affects resonant frequency in these channel-drop filters. These parameters include dielectric constant of inner rods, coupling rods and whole rods of the structure as well as radius of the coupling rods and scatterer rods. At dropping case, the power transferred to the drop waveguide and the power remaining in the bus waveguide are found by finite difference time domain (FDTD) method to be over 95% and less than 5%, respectively.
New Design of T-Shaped Channel Drop Filter Based on Photonic Crystal Ring Resonator
Nanoscience and Nanotechnology, 2016
In this paper, we propose a new design of T-shaped channel drop filter using photonic crystal ring resonator. The proposed structure is composed of two photonic crystal waveguides and a square photonic crystal ring resonator with circular inner rods configuration. Calculations of band structure and normalized transmission spectra are done by plane wave expansion (PWE) and finite difference time domain (FDTD) methods, respectively. According to the results, we note that 100% dropping efficiency with quality factor of 502 is achievable at wavelength λ=1.578487 μm. The effect of varying different parameters on the resonant wavelength and dropping efficiency of the filter is investigated. These parameters include refractive index, radius of inner and whole rods.
ARTICLE IN PRESS G Model T-shaped channel drop filter based on photonic crystal ring resonator
Photonic crystal ring resonators are promising candidates for realizing all optical filters with acceptable transmission efficiency and quality factor values. In this paper, by putting a12-fold quasi crystal at the middle of on 7 × 7 square cavity we created a ring resonator structure and designed a T-shaped channel drop filter. The drop wavelength of our filter is at 1551 nm, with transmission efficiency and quality factor equal to 90% and 387. Our structure is composed of dielectric rods immersed in air. Because in this kind of structures the dominant band gap is in TM mode, all of our simulations have been done in TM mode. The total footprint of our filter is 242.4 m 2 , which makes it suitable for all optical integrated circuits.
Ijca Proceedings on Recent Advances in Wireless Communication and Artificial Intelligence, 2014
In this paper, we have proposed a new design of two dimensional (2D) photonic crystal (PhC) Tunable channel drop filter (CDF) using ring resonators. The increasing interest in photonic integrated circuits (PIC's) and the increasing use of alloptical fiber networks as backbones for global communication systems have been based in large part on the extremely wide optical transmission bandwidth provided by dielectric materials. Based on the analysis we present novel photonic crystal channel drop filters. Simulations demonstrate that these filters exhibit ideal transfer characteristics. Dropping efficiency at the resonance of single ring are 92% and quality factor is obtained 1046. The footprint of the proposed structure is about 125.6μm2; therefore this structure can be used in the future photonic integrated circuits.
Quality Factor Enhancement of Optical Channel Drop Filters Based on Photonic Crystal Ring Resonators
International Journal of Optics and Photonics
In this paper, a channel drop ring resonator filter based on two dimensional photonic crystal is proposed which is suitable for all optical communication systems. The multilayer of silicon rods in the center of resonant ring enables one to adjust resonant wavelength of the ring and enhance power coupling efficiency between ring and waveguide. Refractive index and radius of multilayer rods inside the ring are important factors which help one to enhance the desired output parameters. The proposed structure is capable of presenting high quality factor near 1937 in conjunction with 0.8 nm pass band. The high coupling efficiency 99% is another advantage of the proposed filter.
2016
In this paper a new optical channel drop filter (CDF) based on two dimensional (2-D) photonic crystals (PhC) with hexagonal shaped structure is proposed and numerically demonstrated by using the finite-difference-time-domain (FDTD) and planewave-expansion (PWE) techniques. Photonic crystals (PhCs) are artificial dielectric nanostructure materials in which a periodic modulation of the material dielectric constant results in a photonic band gap (PBG). By employing defects in the photonic crystals, light can steer in specific direction and consequently in the most of PhC applications, defects are used in their structures. The proposed structure is consisted of two series hexagonal shaped rings of Si rods between two straight waveguides to improve the performance of the channel drop filter. By analyzing the proposed structure, wide ranges of TE photonic band gap (PBG) would be achieved. It will be indicated that the proposed channel drop filter has appropriate characteristics and can be...
Three output port channel-drop filter based on photonic crystals
Applied Optics, 2009
We present a photonic-crystal (PC) channel-drop filter (CDF) design based on 3 × 3 PC ring resonators. The normalized transmission spectra for single-ring and dual-ring configurations have been investigated using two-dimensional finite-difference time-domain (FDTD) technique in a square-lattice dielectric-rod PC structure. First, we investigate a single ring and we show that backward and forward dropping is possible in the third communication window. Then we add another ring and waveguide to develop a new CDF. This filter consists of an input and three outputs. Our FDTD simulation yields more than 85% efficiency over each output port.
Channel drop filters in photonic crystals
Optics Express, 1998
We present a general analysis of channel drop filter structures composed of two waveguides and an optical resonator system. We show that 100% transfer between the two waveguides can occur by creating resonant states of different symmetry, and by forcing an accidental degeneracy between them. The degeneracy must exist in both the real and imaginary parts of the frequency. Based on the analysis we present novel photonic crystal channel drop filters. Numerical simulations demonstrate that these filters exhibit ideal transfer characteristics.