Optical CMOS Transceiver with 8×32 SPAD Array, 32 TDCs and Laser Diode Driver for Wearable Time-Domain Diffuse Optics Applications
Nissinen, Jan; Pakaslahti, Marko; Leikanger, Tore; Hakkinen, Juha; Huikari, Jaakko; Nissinen, Ilkka (2023-11-28)
IEEE
28.11.2023
J. Nissinen, M. Pakaslahti, T. Leikanger, J. Häkkinen, J. Huikari and I. Nissinen, "Optical CMOS Transceiver with 8×32 SPAD Array, 32 TDCs and Laser Diode Driver for Wearable Time-Domain Diffuse Optics Applications," 2023 IEEE SENSORS, Vienna, Austria, 2023, pp. 1-4, doi: 10.1109/SENSORS56945.2023.10325209
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© 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists,or reuse of any copyrighted component of this work in other works.
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202405284000
https://urn.fi/URN:NBN:fi:oulu-202405284000
Tiivistelmä
Abstract
A single-chip optical transceiver for wearable time-domain diffuse optics healthcare applications has been fabricated in 150 nm CMOS technology. The chip includes an 8×32 single-photon avalanche diode (SPAD) array with 32 time-to-digital converters (TDC) with ~60 ps resolution and a laser diode driver which can produce short ~0.5 A current pulses at a repetition rate of 15 MHz. The measured instrument response function (IRF) of the transceiver was measured to be ~120 ps with a laser pulse width of 90 ps and a wavelength of 854 nm.
A single-chip optical transceiver for wearable time-domain diffuse optics healthcare applications has been fabricated in 150 nm CMOS technology. The chip includes an 8×32 single-photon avalanche diode (SPAD) array with 32 time-to-digital converters (TDC) with ~60 ps resolution and a laser diode driver which can produce short ~0.5 A current pulses at a repetition rate of 15 MHz. The measured instrument response function (IRF) of the transceiver was measured to be ~120 ps with a laser pulse width of 90 ps and a wavelength of 854 nm.
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