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Comparison of optical properties of 1×8 Y-branch and MMI splitter based on silicon nitride material platform

  • This paper describes two different designs of 1×8 passive optical splitters. The first splitter consists of cascade arranged directional waveguide branches (Y-branch splitter) with (0.8×0.16) µm2 waveguide cross-section. The second splitter is based on multimode interference occurring in a large MMI coupler, which uses a self-imaging effect for beam propagation, exhibiting the same waveguide core size as a Y-branch splitter. The waveguide channel profile, used in both approaches, is based on a silicon nitride material platform, with a refractive index of core being nc = 1.925 and a refractive index of cladding ncl = 1.4575. The splitters are designed as a planar structure for a medical operating wavelength 850 nm. Design, simulation, and optimization of passive optical components are performed by a commercial photonic software tool BeamPROP simulation engine by RSoft Photonics Suite tool, employing beam propagation method. This work aims to find the minimum physical dimensions of the designed splitters with the satisfactory optical performance. According to the minimum insertion loss and minimum non-uniformity, the optimum length of the splitters is determined. Finally, the optical properties of splitters for both approaches are discussed and compared with each other.

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Metadaten
Author:Stanislava SerecunovaORCiD, Dana SeyringerORCiD, Frantisek Uherek, Jozef Chovan, Heinz Seyringer
DOI:https://doi.org/10.1117/12.2662002
ISSN:0277-786X
Parent Title (English):22nd Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics. 5-9 September 2022. Wojanow, Poland.
Publication Series:Proceedings of SPIE, Volume 12502
Publisher:SPIE
Place of publication:Bellingham, Washington
Document Type:Conference Proceeding
Language:English
Year of publication:2022
Release Date:2023/01/10
Article Number:125020F
Number of pages:8
First Page:1
Last Page:7
Organisationseinheit:Forschung
Forschung / Forschungszentrum Mikrotechnik
Forschung / Forschungszentrum Digital Factory Vorarlberg
DDC classes:500 Naturwissenschaften und Mathematik
JEL-Classification:Z Other Special Topics
Open Access?:nein
Peer review:wiss. Beitrag, nicht peer-reviewed
Publicationlist:Seyringer, Dana
Seyringer, Heinz