Journal article
Polarization-insensitive ultra-short waveguide taper
National University of Defence Technology1
Department of Photonics Engineering, Technical University of Denmark2
Diode Lasers and LED Systems, Department of Photonics Engineering, Technical University of Denmark3
Jiangsu University4
National University of Defense Technology5
Hebei University of Technology6
Centre of Excellence for Silicon Photonics for Optical Communications, Centers, Technical University of Denmark7
Academy of Military Sciences8
Waveguide taper, a key component in the photonic integrated circuit (PIC), enables on-chip mode conversion, but large-footprint tapers are detrimental to the PIC, which desires compact and efficient devices. Polarization sensitivity also limits the tapers in the applications involving orthogonal modes.
In this work, we design an efficient polarization-insensitive ultra-short MMI-based waveguide taper, through the mode spreading principle and the self-image principle. The proposed taper is 26.3 µm long, one order of magnitude shorter than the standard linear taper. We fabricate the taper, and experimentally demonstrate that it exhibits a high transmission efficiency of ∼70% and a wide 1 dB bandwidth of >54nm, for both TE and TM polarizations.
Language: | English |
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Year: | 2021 |
Pages: | 5027-5030 |
ISSN: | 15394794 and 01469592 |
Types: | Journal article |
DOI: | 10.1364/OL.436223 |
ORCIDs: | Shi, Xiaodong , 0000-0002-9388-8752 and Ou, Haiyan |