| Authors: | A. Ribeiro, S. Declercq, U. Khan, M. Wang, L. Van Iseghem, W. Bogaerts | | Title: | Column-row addressing of thermo-optic phase shifters for controlling large silicon photonic circuits | | Format: | International Journal | | Publication date: | 2/2020 | | Journal/Conference/Book: | IEEE Journal on Selected Topics in Quantum Electronics
| | Volume(Issue): | 26(5) p.6100708 (8 pages) | | DOI: | 10.1109/JSTQE.2020.2975669 | | Citations: | 19 (Dimensions.ai - last update: 14/4/2024)
1 (OpenCitations - last update: 19/4/2024)
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Abstract
We demonstrate a time-multiplexed row-column addressing scheme to drive thermo-optic phase shifters in a silicon photonic circuit. By integrating a diode in series with the heater, we can connect N x M heaters in an matrix topology to N row and M column lines. The heaters are digitally driven with pulse-width modulation, and time-multiplexed over different channels. This makes it possible to drive the circuit without digital-to-analog converters, and using only M+N wires. We demonstrate this concept with a 1 x 16 power splitter tree with 15 thermo-optic phase shifters that are controlled in a 3 x 5 matrix, connected through 8 bond pads.
This technique is especially useful in silicon photonic circuits with many tuners but limited space for electrical connections. Related Research Topics
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