Back to Search
Start Over
Polarization-Splitting Grating Coupler on Lithium Niobate Thin Film
- Source :
- Crystals, Vol 14, Iss 3, p 226 (2024)
- Publication Year :
- 2024
- Publisher :
- MDPI AG, 2024.
-
Abstract
- In this study, one-dimensional grating coupler on single-crystal lithium niobate thin film (lithium niobate on insulator, LNOI) that also served as a polarization splitter was designed. The coupler could separate both orthogonal polarization states into two opposite directions while coupled light from a standard single-mode fiber to a waveguide on LNOI at the same time. Using segmented and apodized designing, the peak coupling efficiencies (CEs) around telecommunication wavelength 1550 nm for fundamental TE and TM modes of −2.82 dB and −2.83 dB, respectively, were achieved. The CEs could be optimized to −1.97 dB and −1.8 dB when a metal layer was added below the silicon dioxide layer.
- Subjects :
- polarization splitter
grating coupler
lithium niobate
LNOI
Crystallography
QD901-999
Subjects
Details
- Language :
- English
- ISSN :
- 20734352
- Volume :
- 14
- Issue :
- 3
- Database :
- Directory of Open Access Journals
- Journal :
- Crystals
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.1f755457a4c44200b90f473f93f451bd
- Document Type :
- article
- Full Text :
- https://doi.org/10.3390/cryst14030226