Real-time fluorescence lifetime actuation for cell sorting using a CMOS SPAD silicon photomultiplier

Francescopaolo Mattioli Della Rocca, Jakub Nedbal, David Tyndall, Nikola Krstajic, David Day-Uei Li, Simon M. Ameer-Beg, Robert K. Henderson

Research output: Contribution to journalArticle

24 Citations (Scopus)
60 Downloads (Pure)

Abstract

Time-correlated single photon counting (TCSPC) is a fundamental fluorescence lifetime measurement technique offering high signal to noise ratio (SNR). However, its requirement for complex software algorithms for histogram processing restricts throughput in flow cytometers and prevents on-the-fly sorting of cells. We present a single-point digital Silicon Photomultiplier (SiPM) detector accomplishing real-time fluorescence lifetime-activated actuation targeting cell sorting applications in flow cytometry. The sensor also achieves burst-integrated fluorescence lifetime (BIFL) detection by TCSPC. The SiPM is a single-chip complementary metal oxide semiconductor (CMOS) sensor employing a 3232 single-photon avalanche diode (SPAD) array and 8 pairs of time-interleaved time to digital converters (TI-TDCs) with a 50 ps minimum timing resolution. The sensor’s pile-up resistant embedded centre of mass method (CMM) processor accomplishes lowlatency measurement and thresholding of fluorescence lifetime. A digital control signal is generated with a 16.6 s latency for cell sorter actuation allowing a maximum cell throughput of 60,000 cells per second and an error rate of 0.6%.
Original languageEnglish
Pages (from-to)673-676
Number of pages4
JournalOptics Letters
Volume41
Issue number4
DOIs
Publication statusPublished - 4 Feb 2016

Keywords

  • fluorescence lifetime measurement
  • cell sorting
  • single photon avalanche diode

Cite this

Mattioli Della Rocca, F., Nedbal, J., Tyndall, D., Krstajic, N., Li, D. D-U., Ameer-Beg, S. M., & Henderson, R. K. (2016). Real-time fluorescence lifetime actuation for cell sorting using a CMOS SPAD silicon photomultiplier. Optics Letters, 41(4), 673-676. https://doi.org/10.1364/OL.41.000673