CMOS Transceiver with Time-Gated 4×8 SPAD Array and Width-Controlled Laser Diode Pulser for Time-Domain Diffuse Optics Measurements
Pakaslahti, Marko; Nissinen, Ilkka; Nissinen, Jan (2023-11-28)
IEEE
28.11.2023
M. Pakaslahti, I. Nissinen and J. Nissinen, "CMOS Transceiver with Time-Gated 4×8 SPAD Array and Width-Controlled Laser Diode Pulser for Time-Domain Diffuse Optics Measurements," 2023 IEEE SENSORS, Vienna, Austria, 2023, pp. 1-4, doi: 10.1109/SENSORS56945.2023.10325293
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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-202405283999
https://urn.fi/URN:NBN:fi:oulu-202405283999
Tiivistelmä
Abstract
A CMOS transceiver for time-domain diffuse optics measurements has been fabricated with 150 nm CMOS technology on a single die. The pulse width of a laser diode (LD) can be adjusted from 835 ps to 3 ns, with a resolution of ∼100 ps, for different types of LDs. The time-gated and time-resolved 4×8 SPAD array can be loaded to Geiger mode within less than 150 ps. The TDC can capture returning photons with a resolution of ∼52.46 ps, and the data is stored in 128 14-bit counters. The repetition rate can be up to 12.5 MHz. At a 1 Hz sample rate, with 1 000 000 pulses, the average power consumption of the transceiver was 25.76 mW, excluding the FPGA controller.
A CMOS transceiver for time-domain diffuse optics measurements has been fabricated with 150 nm CMOS technology on a single die. The pulse width of a laser diode (LD) can be adjusted from 835 ps to 3 ns, with a resolution of ∼100 ps, for different types of LDs. The time-gated and time-resolved 4×8 SPAD array can be loaded to Geiger mode within less than 150 ps. The TDC can capture returning photons with a resolution of ∼52.46 ps, and the data is stored in 128 14-bit counters. The repetition rate can be up to 12.5 MHz. At a 1 Hz sample rate, with 1 000 000 pulses, the average power consumption of the transceiver was 25.76 mW, excluding the FPGA controller.
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