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Proposal for an ultra-broadband polarization beam splitter using an anisotropy-engineered Mach-Zehnder interferometer on the x-cut lithium-niobate-on-insulator
- Source :
- Optics express. 28(8)
- Publication Year :
- 2020
-
Abstract
- We propose and theoretically demonstrate an integrated polarization beam splitter on the x-cut lithium-niobate-on-insulator (LNOI) platform. The device is based on a Mach-Zehnder interferometer with an anisotropy-engineered multi-section phase shifter. The phase shift can be simultaneously controlled for the TE and TM polarizations by engineering the length and direction of the anisotropic LNOI waveguide. For TE polarization, the phase shift is −π/2, while for TM polarization, the phase shift is π/2. Thus, the incident TE and TM modes can be coupled into different output ports. The simulation results show an ultra-high polarization extinction ratio of ∼47.7 dB, a low excess loss of ∼0.9 dB and an ultra-broad working bandwidth of ∼200 nm. To the best of our knowledge, the proposed structure is the first integrated polarization beam splitter on the x-cut LNOI platform.
- Subjects :
- Materials science
Extinction ratio
business.industry
Bandwidth (signal processing)
Lithium niobate
02 engineering and technology
021001 nanoscience & nanotechnology
Polarization (waves)
Mach–Zehnder interferometer
01 natural sciences
Atomic and Molecular Physics, and Optics
010309 optics
Interferometry
chemistry.chemical_compound
Optics
chemistry
0103 physical sciences
0210 nano-technology
Anisotropy
business
Phase shift module
Subjects
Details
- ISSN :
- 10944087
- Volume :
- 28
- Issue :
- 8
- Database :
- OpenAIRE
- Journal :
- Optics express
- Accession number :
- edsair.doi.dedup.....947bfbd1cedb8d23286896613669a6a9