Photon counting fibre optic distributed temperature sensing with a CMOS SPAD array

Caitlin S. Tye, Katjana Ehrlich, Andrew D. M. Green, Robert K. Henderson, Michael G. Tanner

Research output: Contribution to journalArticlepeer-review

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Abstract

Time-resolved fibre optic Raman distributed temperature sensing (DTS) measurements experience long measurement times due to a weak backscattered Raman signal inside optical fibres or limited detector count rates. Here, improvements to previous work based on individual detectors are demonstrated using a 512 pixel complementary-metal-oxide semiconductor (CMOS) single-photon avalanche diode (SPAD) line sensor array with integrated (on-chip) timing electronics. Multiplexed single photon counting increases count rate and decreases measurement time for practical applications. This allows temperature to be measured every 0.5 m with 0.7 °C accuracy and a 10 s measurement time using a 13.0 m optical fibre, performance over longer distance is also investigated.
Original languageEnglish
Pages (from-to)6481-6493
Number of pages13
JournalOptics Express
Volume32
Issue number4
Early online date8 Feb 2024
DOIs
Publication statusPublished - 12 Feb 2024

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