Fluorescence Detection in Sensor Technologies

Demchenko, Alexander P.

doi:10.1007/978-3-030-60155-3_3

Introduction to Fluorescence Sensing 2020

DOI: 10.1007/978-3-030-60155-3_3

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Fluorescence Detection in Sensor Technologies

Alexander P. Demchenko

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2024

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Flying Particle Thermosensor in Hollow-Core Fiber Based on Fluorescence Lifetime Measurements

Freitag,

Koeppel,

Romodina

et al. 2024

IEEE J. Select. Topics Quantum Electron.

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Thermosensitive fluorescence lifetime measurements enable accurate thermometry independent of intensity fluctuations along the optical path. Here, we report lifetime-based temperature measurements of a single europium-doped particle optically trapped in an air-filled hollow-core fiber. A frequencydomain fluorescence lifetime measurement setup was integrated into a dual-beam optical trap. The measured apparent lifetime shows a linear temperature dependence of −1.8 µs/K for excitation at 400 Hz. The results were repeatable over multiple cooling and heating cycles. In addition to temperature sensing, the influence of the high-power trapping laser on the measured apparent lifetime and fluorescence intensity was investigated. The observed laser-induced particle heating can be exploited to increase the fluorophore's sensitivity and operating range for low-temperature sensing. Fluorescence lifetime measurements of optically trapped particles inside a hollow-core fiber are promising for temperature sensing with micrometer spatial resolution over meter-scale distances.Index Terms-frequency-domain fluorescence lifetime, hollowcore fiber, optical trapping, flying particle temperature sensor I. INTRODUCTIONF IBER optic sensors that exploit temperature-dependent scattering or reflections along a sensing fiber are widely used for distributed temperature measurements in harsh environments [1]- [5]. As a new versatile optical sensor platform, Manuscript

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Flying Particle Thermosensor in Hollow-Core Fiber Based on Fluorescence Lifetime Measurements

Freitag,

Koeppel,

Romodina

et al. 2024

IEEE J. Select. Topics Quantum Electron.

View full text Add to dashboard Cite

show abstract

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Fluorescence Detection in Sensor Technologies

Cited by 1 publication

References 100 publications

Flying Particle Thermosensor in Hollow-Core Fiber Based on Fluorescence Lifetime Measurements

Flying Particle Thermosensor in Hollow-Core Fiber Based on Fluorescence Lifetime Measurements

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