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Improved Performance of a Wavelength-Tunable Arrayed Waveguide Grating in Silicon on Insulator

2019-05-30

Authors: Yuan, P; Zhang, XG; An, JM; Yin, PG; Wang, Y; Wu, YD
CHINESE PHYSICS LETTERS
Volume: 36 Issue: 5 Published: MAY 2019 Language: English Document type: Article
DOI: 10.1088/0256-307X/36/5/054204
Abstract:
The improved performance of a wavelength-tunable arrayed waveguide grating (AWG) is demonstrated, including the crosstalk, insertion loss and the wavelength tuning efficiency. A reduced impact of the fabrication process on the AWG is achieved by the design of bi-level tapers. The wavelength tuning of the AWG is achieved according to the thermo-optic effect of silicon, and uniform heating of the silicon waveguide layer is achieved by optimizing the heater design. The fabricated AWG shows a minimum crosstalk of 16 dB, a maximum insertion loss of 3.91 dB and a wavelength tuning efficiency of 8.92 nm/W, exhibiting a similar to 8 dB improvement of crosstalk, similar to 2.1 dB improvement of insertion loss and similar to 5 nm/W improvement of wavelength tuning efficiency, compared to our previous reported results.
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