Coherent anti-Stokes Raman scattering imaging using silicon photomultipliers
| Autor: | Sangeeta Murugkar, Olivia Raiche-Tanner, Benjamin Hansson, Christian Harry Allen |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Photomultiplier
Materials science Light detection Stray light business.industry 02 engineering and technology 021001 nanoscience & nanotechnology Noise figure 01 natural sciences Atomic and Molecular Physics and Optics 010309 optics symbols.namesake Optics Silicon photomultiplier 0103 physical sciences symbols 0210 nano-technology business Raman scattering Pulse height Voltage |
| Zdroj: | Optics letters. 45(8) |
| ISSN: | 1539-4794 |
| Popis: | Silicon photomultipliers (SiPMs) are an emerging solid-state alternative to photomultiplier tubes (PMTs) for low light detection, with similar gain but lower cost and lower operating voltage. We demonstrate coherent anti-Stokes Raman scattering (CARS) imaging in a side-by-side comparison of an uncooled SiPM with an uncooled multialkali PMT as well as a state-of-the-art cooled GaAsP PMT. We determine the optimum reverse-bias voltage for acquiring the best signal-to-noise ratio (SNR) for CARS imaging of lipids at 2850 c m − 1 . We find that despite the higher dark counts, the SNR of CARS images acquired with the uncooled SiPM biased at an optimum voltage is better than that of the multialkali PMT and close to that of the cooled GaAsP PMT ( ∼ 1.5 and ∼ 0.8 times, respectively). This is due to the higher gain and lower excess noise factor related to the pulse height variability in the SiPM. |
| Databáze: | OpenAIRE |
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