Abstract
In this paper, a pulse-width-modulation (PWM)-based silicon photonics receiver for optical power monitoring that was realized using a 90-nm CMOS silicon-on-insulator (SOI) process is reported. By monitoring the DC or the AC power in the optical nodes and converting it into an electrical signal, large-scale photonic integrated circuits can acquire smartness and automation characteristics. The proposed PWM-based silicon photonics receiver can simply readout the optical power of target nodes without complex mixed-mode circuitries, such as analog-to-digital converters. The PWM receiver consists of a I–V amplifier, simple digital circuitries, free-running on-chip oscillators, and bias circuits. The receiver achieves a 10-nA detection limit, under a 1.5% detection error due to the quantization process of the PWM scheme. The receiver can operate as an on-chip optical power monitor for large-scale silicon-based photonic integrated circuits.
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Acknowledgments
This research was supported by Industrial Technology Innovation Program through the Ministry of Trade, Industry, and Energy, Korea (Project No. 10085631, 20008422).
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Park, K., Ban, J. & Oh, WS. Pulse-Width-Modulation-Based Silicon Photonics Receiver with Readout Circuitries for On-chip Optical Power Monitoring. J. Korean Phys. Soc. 77, 916–918 (2020). https://doi.org/10.3938/jkps.77.916
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DOI: https://doi.org/10.3938/jkps.77.916