Mode-field Matching Down-Tapers on Single-Mode Optical Fibers for Edge Coupling Towards Generic Photonic Integrated Circuit Platforms
| Autor: | Nathalie Vermeulen, V. Panapakkam, Hugo Thienpont, Jan Watte, Jurgen Van Erps, Koen Vanmol, Kumar Saurav |
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| Přispěvatelé: | Applied Physics and Photonics, Faculty of Engineering, Technology Transfer & Interface, Brussels Photonics Team |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Coupling
Optical fiber Fabrication Materials science business.industry Photonic integrated circuit Single-mode optical fiber Physics::Optics 02 engineering and technology waveguide Chip 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics chemistry.chemical_compound 020210 optoelectronics & photonics chemistry law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Indium phosphide Optoelectronics Photonics business |
| Popis: | Connections between standard single-mode fibers and waveguides in photonic integrated circuits tend to have relatively high coupling losses due to a difference in mode size and mode profile between both light guiding media. Edge coupling strategies involving specialty fibers are frequently used to obtain the best performance in terms of coupling efficiency, bandwidth and polarization independence. We propose the fabrication of free-standing down-taper structures on top of cleaved fiber facets by two-photon direct laser writing and show their performance for silicon, silicon nitride and indium phosphide generic chip platforms. We present a comprehensive analysis of the design of such taper structures that show unprecedented flexibility. We demonstrate their fabrication and fully characterize them in terms of output modal fields and coupling efficiencies. Furthermore, we experimentally compare the fabricated down-tapers with commercially available lensed fibers and demonstrate equal or better coupling efficiency for four out of the five investigated photonic integrated circuit platforms, with a measured improvement in coupling efficiency up to 1.43 dB. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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