Design of a 2D fiber mode converter using a planar 2D multi-mode interference structure

Wageeh, Amr; El-Sabban, Salwa; Khalil, Diaa

doi:10.1016/j.ijleo.2020.164500

Cited by 8 publications

(4 citation statements)

References 28 publications

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“…The new degree of freedom introduced by OAM can be effectively exploited to enhance the integrated optical devices such as optical beam splitters [4], mode convertors [7], couplers [8], wavelength-division (de)multiplexers [9] and capacity enhancement of the optical communication links through mode division multiplexing (MDM) technique which loads channel's data on different simultaneous carrying modes [10]. Hence, in order to implement their commercial communication systems, switching and conversion of OAM modes are essential operations.…”

Section: Introductionmentioning

confidence: 99%

Mode Conversion Between Beams Carrying Orbital Angular Momentum With Opposite Topological Charges Using Two-Dimensional Multimode Interference Waveguides

Soltani

Firouzeh

Mousavi

et al. 2023

J. Lightwave Technol.

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Recently, the implementation of rectangular waveguides for generation and manipulation of orbital angular momentum (OAM) modes, has been developed to exploit the outstanding features of these modes in more complex integrated devices. Multimode interference (MMI) structures have been widely used in both one and two dimensions as the basic elements in many integrated optical devices like optical beam splitters, mode converters, couplers, wavelength-division (de)multiplexers, and switches. According to the various applications of OAM modes in quantum and classical communications, the study of their propagation properties in MMI waveguides is useful in order to facilitate the way into higher security and capacity systems. In this work, mode conversion between beams carrying OAM with opposite topological charges in the two-dimensional (2D) MMI waveguides is investigated. In this investigation, the OAM modes with odd topological charges are considered. Using the self-imaging properties of MMI structures, an integrated device including two MMI waveguides connected by phase shifters and linear waveguides is designed. The design procedure is performed for OAM modes with topological charge values of l=±1 and l=±3 using beam propagation method. The proposed device is passive with reciprocal behavior and has the output mode purity of 94% and 82% for beams carrying l=±1 and l=±3, respectively.

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Section: Introductionmentioning

confidence: 99%

Mode Conversion Between Beams Carrying Orbital Angular Momentum With Opposite Topological Charges Using Two-Dimensional Multimode Interference Waveguides

Soltani

Firouzeh

Mousavi

et al. 2023

J. Lightwave Technol.

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“…In [18], the phase shifter is a part of Mode selecting switch to select one of the two outputs; TE0 mode or TE1 mode to exit from the MMI. In [19,20] the phase shifter with a butterfly-shape is used in the design of a 2D mode converter to enable the excitation of the LP21 fiber mode. In this work we develop design formulas for the optical phase shift between two waveguides of the same length, one is used as a reference guide and the other creates the required phase change.…”

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 Rubana et al (2017), the phase shifter is used as a part of mode switch to select one of the two outputs; TE 0 mode or TE 1 . In Wageeh et al (2018Wageeh et al ( , 2020 the phase shifter with a butterfly-shape is used in the design of a 2D mode converter to enable the excitation of the LP21 fiber mode.…”

Section: Introductionmentioning

confidence: 99%

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

2022

Self Cite

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

Design of a 2D fiber mode converter using a planar 2D multi-mode interference structure

Cited by 8 publications

References 28 publications

Mode Conversion Between Beams Carrying Orbital Angular Momentum With Opposite Topological Charges Using Two-Dimensional Multimode Interference Waveguides

Mode Conversion Between Beams Carrying Orbital Angular Momentum With Opposite Topological Charges Using Two-Dimensional Multimode Interference Waveguides

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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