Active quenching circuit with adjustable reverse bias voltage for single photon avalanche diodes arrays

Lixia Zheng; Kang Hu; Jin Wu; Weifeng Sun

doi:10.1117/12.2616320

15 February 2022 Active quenching circuit with adjustable reverse bias voltage for single photon avalanche diodes arrays

Lixia Zheng, Kang Hu, Jin Wu, Weifeng Sun

Author Affiliations +

Proceedings Volume 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021); 121663A (2022) https://doi.org/10.1117/12.2616320
Event: Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 2021, Hong Kong, Hong Kong

Abstract

In this paper, a quenching circuit architecture, where the reverse bias voltage is adjustable, was proposed to deal with the non-uniform breakdown voltages of single-photon avalanche diode (SPAD) linear arrays. A global resistor string digital-to-analog converter (DAC) was applied in this architecture to provide an optional potential for the anode of SPAD. Adjusting the anode voltage of SPAD according to its breakdown voltage can guarantee each detector in the array with similar excess bias voltage. The bias voltage of each pixel is adjustable from 0 to 2V with the step length of 62.5mV. Also, based on the reverse bias voltage regulation circuit, a novel active quenching circuit was designed, which can quickly quench the avalanche process, and simulated in the 1×128 SPAD readout circuit for further verification. The SPAD array was fabricated in SiC technology and the quenching and readout circuit was fabricated in TSMC 0.18-μm CMOS technology. The whole 1×128 SiC SPAD arrays and circuits were packaged by gold wire bonding. The measurements show that the SPAD array can realize avalanche detection and quenching, moreover the dark count uniformity of array SPADs can be significantly improved.

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Lixia Zheng, Kang Hu, Jin Wu, and Weifeng Sun "Active quenching circuit with adjustable reverse bias voltage for single photon avalanche diodes arrays", Proc. SPIE 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 121663A (15 February 2022); https://doi.org/10.1117/12.2616320

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KEYWORDS

Sensors

Quenching (fluorescence)

Detector arrays

Avalanche photodiodes

Signal detection

Silicon carbide

Device simulation

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