Novel design of four-channel wavelength division demultiplexer based on two-dimensional photonic crystal ring resonators

Chergui, Imane; Bounaas, Faiza; Labbani, Amel

doi:10.1109/icateee57445.2022.10093695

Cited by 4 publications

(2 citation statements)

References 18 publications

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“…Due to the special characteristics of PhCs mentioned above, a considerable number of recent works have been dedicated to improving the performance of CDFs, which has proven to be a research hotspot. PhC CDFs with a ring resonator in [22] obtained nearly 100 transmissions, but its 1 nm bandwidth resulted in a low quality (Q) factor of 1613, which requires improvement. Eight-channel CDFs with eight PhC ring resonators result in a high Q factor of 5150 and a low average transmissivity of 70.4%, causing high energy consumption [23].…”

Section: Introductionmentioning

confidence: 99%

Design of Channel Drop Filters Based on Photonic Crystal with a Dielectric Column with Large Radius inside Ring Resonator

Zhang,

Yang,

Wang

2024

Photonics

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Photonic crystal channel drop filters (CDFs) play a vital role in optical communication owing to their ability to drop the desired channel. However, it remains challenging to achieve high-efficiency CDFs. Here, we demonstrate a highly efficient three-channel CDF with both high transmission and high quality (Q) factor based on a novel ring resonator that is in the middle of two waveguides. A dielectric column with a large radius replaces the homogeneously distributed dielectric columns inside the ring cavity to modulate the coupling ratio with a straight waveguide, thereby enhancing the transmission and Q factor. The transmission and Q factor of the single-cavity filter are 99.7% and 12,798.4, respectively. The mean value of the three-channel filter based on the basic unit can reach up to 94.6% and 10,617, respectively, and a crosstalk between −30.16 and −50.61 dB is obtained. The proposed CDFs provide efficient filter capability, which reveals great potential in integrated optoelectronics and optical communication.

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Section: Introductionmentioning

confidence: 99%

Design of Channel Drop Filters Based on Photonic Crystal with a Dielectric Column with Large Radius inside Ring Resonator

Zhang,

Yang,

Wang

2024

Photonics

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“…Signi cant attempts have been made to study the theoretical and experimental properties of optical devices based on photonic crystal couplers with the aim of achieving shorter coupling lengths and improved performance [4][5][6][7]. Photonic crystal couplers play a crucial role in many optical communication systems such as optical logic gates [8,9] ,optical splitter [10,11] ,optical switches [12][13][14],sensors [15,16], lters [17,18],and demultiplexers [19][20][21][22]. These devices provide advantages such as reduced crosstalk, compact size and high e ciency.…”

Section: Introductionmentioning

confidence: 99%

A Novel Design of Photonic Crystal Directional Coupler with Ultra Short Coupling Length Using Core /Shell Rods Defect

Chergui,

Labbani

2023

Preprint

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In this paper, a novel method to diminish the coupling length and enhance the coupling coefficient in a two-dimensional (2D) photonic crystal (PC) directional coupler (DC)is investigated. The DC comprises two closely spaced linear waveguides separated by one row of silicon columns. In this new approach, we used core/shell (C/S) rods between the waveguides to reduce the coupling length. The C/S rod is obtained by etching a hole in the middle of the silicon rod. This modification leads to a very short coupling length of 5a, where a is the lattice constant of the structure. Simulation results show that increasing the inner core radius increases the coupling coefficient. The coupling properties have been numerically simulated and analyzed using the finite difference time domain (FDTD) and the plane-wave expansion (PWE) methods. Based on the modified structure, we analyzed the output spectrum of a very compact channel drop filter. The proposed modified design would offer significant potential for novel ultrasmall devices based on photonic crystal couplers.

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Narrowband channel drop filter with high transmission based on nested hexagonal cavity

Yan,

Zhang,

Liu

et al. 2024

Appl. Phys. A

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Novel design of four-channel wavelength division demultiplexer based on two-dimensional photonic crystal ring resonators

Cited by 4 publications

References 18 publications

Design of Channel Drop Filters Based on Photonic Crystal with a Dielectric Column with Large Radius inside Ring Resonator

Design of Channel Drop Filters Based on Photonic Crystal with a Dielectric Column with Large Radius inside Ring Resonator

A Novel Design of Photonic Crystal Directional Coupler with Ultra Short Coupling Length Using Core /Shell Rods Defect

Narrowband channel drop filter with high transmission based on nested hexagonal cavity

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