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Open AccessJournal ArticleDOI

Realization of an ultra-compact polarization beam splitter using asymmetric MMI based on silicon nitride / silicon-on-insulator platform.

X. Sun, +2 more
- 03 Apr 2017 - 
- Vol. 25, Iss: 7, pp 8296-8305
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TLDR
A compact polarization beam splitter (PBS) based on the silicon nitride/silicon-on-insulator platform using the recently proposed augmented-low-index-guiding (ALIG) waveguide structure is experimentally demonstrated.
Abstract
We have experimentally demonstrated a compact polarization beam splitter (PBS) based on the silicon nitride/silicon-on-insulator platform using the recently proposed augmented-low-index-guiding (ALIG) waveguide structure. The two orthogonal polarizations are split in an asymmetric multimode interference (MMI) section, which was 1.6 μm wide and 4.8 μm long. The device works well over the entire C-band wavelength range and has a measured low insertion loss of less than 1 dB. The polarization extinction ratio at the Bar Port is approximately 17 dB and at the Cross Port is approximately 25 dB. The design of the device is robust and has a good fabrication tolerance.

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Citations
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Journal ArticleDOI

High-Order Dielectric Metasurfaces for High-Efficiency Polarization Beam Splitters and Optical Vortex Generators.

TL;DR: A high-order dielectric metasurface based on silicon nanobrick array is proposed and investigated, and two polarization beam splitters working in high- order diffraction modes have been designed successfully, which demonstrated a high transmitted efficiency.
Journal ArticleDOI

Advanced Passive Silicon Photonic Devices With Asymmetric Waveguide Structures

TL;DR: In this article, the authors discuss the special mode properties of silicon nanophotonic waveguides, including birefringence, mode dispersion, and mode hybridness.
Journal ArticleDOI

Compact polarization beam splitter with a high extinction ratio over S + C + L band

TL;DR: An ultra-broadband high-performance polarization beam splitter (PBS) based on silicon-on-insulator (SOI) platform based on a directional coupler consisting of a 70-nm taper-etched waveguide and a slot waveguide, the structure of which is suitable for a commercial two-step fabrication process.
References
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Journal ArticleDOI

Optical multi-mode interference devices based on self-imaging: principles and applications

TL;DR: The underlying self-imaging principle in multimode waveguides is described using a guided mode propagation analysis and it is shown that multimode interference couplers offer superior performance, excellent tolerance to polarization and wavelength variations, and relaxed fabrication requirements when compared to alternatives such as directional coupling.
Journal ArticleDOI

An integrated-nanophotonics polarization beamsplitter with 2.4 × 2.4 μm2 footprint

TL;DR: In this paper, the authors used an inverse design algorithm and experimentally demonstrated an integrated polarization beamsplitter with a footprint of 2.4×××2.4 μm2.
Journal ArticleDOI

Passive technologies for future large-scale photonic integrated circuits on silicon: polarization handling, light non-reciprocity and loss reduction

TL;DR: Dai et al. as mentioned in this paper presented a novel concept for realizing a polarization splitter-rotator with a very simple fabrication process, which could allow large-scale photonic integrated circuits to be built on silicon substrates.
Journal ArticleDOI

Ultrasmall polarization splitter based on silicon wire waveguides

TL;DR: This work describes an ultrasmall polarization splitter based on a simple directional coupler consisting of silicon wire waveguides that represents a first step towards accomplishing an Ultrasmall optical circuit with polarization diversity based on silicon wireWaveguides.
Journal ArticleDOI

Novel ultra-short and ultra-broadband polarization beam splitter based on a bent directional coupler.

TL;DR: A novel ultra-short polarization beam splitter (PBS) based on a bent directional coupler is proposed by utilizing the evanescent coupling between two bent optical waveguides with different core widths.
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