Journal article
Compact low-birefringence polarization beam splitter using vertical-dual-slot waveguides in silicon carbide integrated platforms
Department of Photonics Engineering, Technical University of Denmark1
Diode Lasers and LED Systems, Department of Photonics Engineering, Technical University of Denmark2
Jiangsu University3
University of Surrey4
Fiber Optics, Devices and Non-linear Effects, Department of Photonics Engineering, Technical University of Denmark5
Centre of Excellence for Silicon Photonics for Optical Communications, Centers, Technical University of Denmark6
The polarization beam splitter is a key component for polarization manipulation in photonic integrated circuits, but it is challenging to design for low-refractive-index optical materials, due to the low birefringence of the waveguides. We propose a novel compact vertical-dual-slot waveguides based coupling scheme for silicon carbide, enabling efficient low-birefringence polarization splitting by extensively modulating the transverse-magnetic mode distribution.
We numerically and experimentally demonstrate the device in the 4H-silicon carbide-on-insulator integrated platform, with a small footprint of 2.2×15 µm2. The device, easy to fabricate via single lithography process as other components on the chip, exhibits low insertion loss of <0.71 dB and <0.51 dB for the transverseelectric and transverse-magnetic polarized light, respectively, and polarization extinction ratio of >13 dB, over 80 nm wavelength range.
Language: | English |
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Year: | 2021 |
Pages: | A8 |
ISSN: | 23279125 |
Types: | Journal article |
DOI: | 10.1364/PRJ.443543 |
ORCIDs: | Shi, Xiaodong , Fan, Weichen , Lu, Yaoqin , Rottwitt, Karsten and Ou, Haiyan |