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Polarization-insensitive multimode interference coupler on an x-cut thin-film lithium niobate platform.
- Source :
-
Optics letters [Opt Lett] 2024 Aug 01; Vol. 49 (15), pp. 4409-4412. - Publication Year :
- 2024
-
Abstract
- Thin-film lithium niobate (TFLN) is a promising integrated photonics platform but currently lacks a polarization-insensitive multimode interference (MMI) coupler, a crucial component for polarization-related optical communication applications such as polarization management, polarization-division multiplexing, and polarization-insensitive modulation systems. This paper presents a novel, to the best of our knowledge, approach by rotating the MMI structure on an anisotropic x-cut TFLN at specific angles to compensate for the difference in the beat length between the two polarizations. A polarization-insensitive 1 × 2 MMI coupler is experimentally achieved with measured transmittances of -2.5 to -4 dB for both output ports and polarization modes in the wavelength range of 1520-1580 nm.
Details
- Language :
- English
- ISSN :
- 1539-4794
- Volume :
- 49
- Issue :
- 15
- Database :
- MEDLINE
- Journal :
- Optics letters
- Publication Type :
- Academic Journal
- Accession number :
- 39090946
- Full Text :
- https://doi.org/10.1364/OL.533030