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Low-loss fiber-to-chip edge coupler for silicon nitride integrated circuits
- Source :
- Optics Express. 31:10525
- Publication Year :
- 2023
- Publisher :
- Optica Publishing Group, 2023.
-
Abstract
- Silicon nitride (SiN) integrated optical waveguides have found a wide range of applications due to their low loss, broad wavelength transmission band and high nonlinearity. However, the large mode mismatch between the single-mode fiber and the SiN waveguide creates a challenge of fiber coupling to these waveguides. Here, we propose a coupling approach between fiber and SiN waveguides by utilizing the high-index doped silica glass (HDSG) waveguide as the intermediary to smooth out the mode transition. We achieved fiber-to-SiN waveguide coupling efficiency of lower than 0.8 dB/facet across the full C and L bands with high fabrication and alignment tolerances.
- Subjects :
- Atomic and Molecular Physics, and Optics
Subjects
Details
- ISSN :
- 10944087
- Volume :
- 31
- Database :
- OpenAIRE
- Journal :
- Optics Express
- Accession number :
- edsair.doi...........fadf36faaf1cef0ceb3be311650fd0e9