Ultracompact and broadband asymmetric directional-coupler-based mode division (de)multiplexer

Mehrabi, Kolsoom; Zarifkar, Abbas

doi:10.1364/josab.36.001907

Cited by 25 publications

(4 citation statements)

References 28 publications

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13] Silicon photonics has been regarded as a promising platform for the realization of on-chip demultiplexers, due to its outstanding advantages, such as the ultrahigh-index contrasts and the complementary metal-oxidesemiconductor compatibility. [14][15][16][17][18][19][20][21][22][23][24][25] Silicon-based wavelengthdivision-multiplexing (WDM) technology is proved to be one of the most successful technologies, which enables signals with different wavelengths to carry information in a single channel simultaneously. [1][2][3][4][5][6] Other dimensions also have been introduced to diversify the multiplexing technologies.…”

Section: Introductionmentioning

confidence: 99%

Integrated Hybrid Mode‐Wavelength Demultiplexers Based on Cascaded Digital Metamaterials

Zhang,

Ye,

Chen

et al. 2024

Advanced Photonics Research

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High‐dimensional multiplexing technology is of importance in the on‐chip photonic interconnections and challenging to design within ultracompact footprint. Herein, high‐dimensional demultiplexers are proposed and demonstrated to enable wavelength‐division and mode‐division simultaneously. The functional regions of digital metamaterials are obtained by inverse design individually and are cascaded to work as high‐dimensional demultiplexers. The gradient‐based inverse design is carried out with an efficient method combining finite‐element method, density method, and method of moving asymptotes. The performances are simulated by 3D finite difference time domain with silicon‐on‐insulator configuration. The proposed demultiplexer with four‐channel has ultracompact footprint of 4.1 × 3.65 μm2. Its average transmission efficiency is 38.7% and contrast ratios are higher than 13.0 dB. Besides, the proposed demultiplexer with six‐channel has a footprint of 4.55 × 5.55 μm2. Its average transmission efficiency is 24.3% and contrast ratios are higher than 11.8 dB.

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Section: Introductionmentioning

confidence: 99%

Integrated Hybrid Mode‐Wavelength Demultiplexers Based on Cascaded Digital Metamaterials

Zhang,

Ye,

Chen

et al. 2024

Advanced Photonics Research

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“…In addition, it is also quite difficult to control the optical phase shift by a simple optical path due to the short wavelength of interest. Recently, there has been an increased interest in mode converters and mode multiplexers for optical communication applications where Mode Division Multiplexing (MDM) [1][2][3][4][5] can be used to increase the system capacity similar to / and in addition to the Wavelength Division Multiplexing (WDM) [6], Time Division Multiplexing (TDM) and Polarization Division Multiplexing PDM [7]. When the mode multiplexers / DeMUX are built using integrated optical technology, they can be deployed on a very large scale with relatively low cost.…”

Section: Introductionmentioning

confidence: 99%

Optical Phase Shifter Design for Single and Multi-Mode Waveguide Configurations

Wageeh

Sabban

Khalil

2022

Preprint

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In this paper, we introduce simple design equations for optical phase shifter configurations on both single mode and multimode platforms. The design equations are based on approximate mathematical expressions describing the phase shift (difference) between two waveguides, one is considered as the reference guide and the second is considered as the phase shifter. Different layout geometrical configurations have been studied: the step width and the linear tapering waveguide. The validity of the design formula is tested using standard Beam Propagation Method BPM. The obtained results are in good agreement with numerical calculations and allow using these closed form expressions in the optical design of such phase shifters.

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“…In interferometric optical systems as well as beam forming systems, this allows controlling the spatial distribution of the optical beam. Recently, there has been an increased interest in such optical phase shifters for building optical mode converters as well as mode multiplexers that are required for optical communication systems to increase system capacity through mode division multiplexing (MDM) (Leuthol et al 1998;El-Sabban and Khalil 2016;Mehrabi and Zarifkar 2019;Shalaby 2018;Berdagué and Facq 1982).…”

Section: Introductionmentioning

confidence: 99%

Optical phase shifter design for single and multi-mode waveguide configurations

2022

View full text Add to dashboard Cite

In this paper, we introduce simple design equations for optical phase shifter configurations on both single mode and multimode platforms. The design equations are based on approximate analytical expressions describing the phase shift (difference) between two waveguides, one is considered as the reference guide and the second is considered as the phase shifter. Different layout geometrical configurations have been studied: the step width and the linear tapering waveguide. The validity of the design formula is tested using standard Beam Propagation Method BPM. The obtained results are in good agreement with numerical calculations and allow using these closed form expressions in the optical design of such phase shifters.

show abstract

Ultracompact and broadband asymmetric directional-coupler-based mode division (de)multiplexer

Cited by 25 publications

References 28 publications

Integrated Hybrid Mode‐Wavelength Demultiplexers Based on Cascaded Digital Metamaterials

Integrated Hybrid Mode‐Wavelength Demultiplexers Based on Cascaded Digital Metamaterials

Optical Phase Shifter Design for Single and Multi-Mode Waveguide Configurations

Optical phase shifter design for single and multi-mode waveguide configurations

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