Calibration of hydrogen atoms measurement using femtosecond two-photon laser-induced fluorescence

Andrey Starikovskiy; Arthur Dogariu

doi:10.1364/OE.562851

Calibration of hydrogen atoms measurement using femtosecond two-photon laser-induced fluorescence

Andrey Starikovskiy, Arthur Dogariu

Research output: Contribution to journal › Article › peer-review

Abstract

What we believe to be a new calibration method for H-fs-TALIF is proposed, and the ratio of two-photon absorption cross-sections, σ⁽2⁾, for atomic hydrogen (H) and krypton (Kr) is determined using the broadband emission of a femtosecond laser system. The estimated ratio of the two-photon absorption cross-sections for H and Kr is σ⁽2⁾(Kr)/σ⁽2⁾(H) = 0.027 ± 20%, which is nearly twenty times lower than values previously obtained with narrowband nanosecond lasers. This discrepancy highlights the need for independent calibration of TALIF measurements for a specific laser pulsewidth range.

Original language	English (US)
Pages (from-to)	26286-26305
Number of pages	20
Journal	Optics Express
Volume	33
Issue number	12
DOIs	https://doi.org/10.1364/OE.562851
State	Published - Jun 16 2025
Externally published	Yes

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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10.1364/OE.562851

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title = "Calibration of hydrogen atoms measurement using femtosecond two-photon laser-induced fluorescence",

abstract = "What we believe to be a new calibration method for H-fs-TALIF is proposed, and the ratio of two-photon absorption cross-sections, σ(2), for atomic hydrogen (H) and krypton (Kr) is determined using the broadband emission of a femtosecond laser system. The estimated ratio of the two-photon absorption cross-sections for H and Kr is σ(2)(Kr)/σ(2)(H) = 0.027 ± 20%, which is nearly twenty times lower than values previously obtained with narrowband nanosecond lasers. This discrepancy highlights the need for independent calibration of TALIF measurements for a specific laser pulsewidth range.",

author = "Andrey Starikovskiy and Arthur Dogariu",

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AU - Starikovskiy, Andrey

AU - Dogariu, Arthur

PY - 2025/6/16

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N2 - What we believe to be a new calibration method for H-fs-TALIF is proposed, and the ratio of two-photon absorption cross-sections, σ(2), for atomic hydrogen (H) and krypton (Kr) is determined using the broadband emission of a femtosecond laser system. The estimated ratio of the two-photon absorption cross-sections for H and Kr is σ(2)(Kr)/σ(2)(H) = 0.027 ± 20%, which is nearly twenty times lower than values previously obtained with narrowband nanosecond lasers. This discrepancy highlights the need for independent calibration of TALIF measurements for a specific laser pulsewidth range.

AB - What we believe to be a new calibration method for H-fs-TALIF is proposed, and the ratio of two-photon absorption cross-sections, σ(2), for atomic hydrogen (H) and krypton (Kr) is determined using the broadband emission of a femtosecond laser system. The estimated ratio of the two-photon absorption cross-sections for H and Kr is σ(2)(Kr)/σ(2)(H) = 0.027 ± 20%, which is nearly twenty times lower than values previously obtained with narrowband nanosecond lasers. This discrepancy highlights the need for independent calibration of TALIF measurements for a specific laser pulsewidth range.

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Calibration of hydrogen atoms measurement using femtosecond two-photon laser-induced fluorescence

Abstract

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