Humidity measurement in air using filament-induced nitrogen monohydride fluorescence spectroscopy

Shuai Yuan; Tiejun Wang; Peifen Lu; See Leang Chin; Heping Zeng

doi:10.1063/1.4867267

Humidity measurement in air using filament-induced nitrogen monohydride fluorescence spectroscopy

Shuai Yuan, Tiejun Wang, Peifen Lu, See Leang Chin, Heping Zeng

Institute for Advanced Study in Precision Spectroscopy

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

31 Scopus citations

Abstract

Strong fluorescence emissions from nitrogen monohydride (NH) free radical at 336 nm were observed in air, when water vapor was present in a 400 nm femtosecond laser filament. The generated NH radical is ascribed to chemical reaction between nitrogen and water vapor during laser filamentation. The backscattered fluorescence from NH shows an exponential increase with increasing filament length, indicating amplified spontaneous emission. The fluorescence intensity of NH was found to be linearly dependent on the relative humidity around the filament region, and a record of NH fluorescence detection at 2 m was achieved, which opens up the possibility for remote humidity measurements.

Original language	English
Article number	091113
Journal	Applied Physics Letters
Volume	104
Issue number	9
DOIs	https://doi.org/10.1063/1.4867267
State	Published - 3 Mar 2014

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title = "Humidity measurement in air using filament-induced nitrogen monohydride fluorescence spectroscopy",

abstract = "Strong fluorescence emissions from nitrogen monohydride (NH) free radical at 336 nm were observed in air, when water vapor was present in a 400 nm femtosecond laser filament. The generated NH radical is ascribed to chemical reaction between nitrogen and water vapor during laser filamentation. The backscattered fluorescence from NH shows an exponential increase with increasing filament length, indicating amplified spontaneous emission. The fluorescence intensity of NH was found to be linearly dependent on the relative humidity around the filament region, and a record of NH fluorescence detection at 2 m was achieved, which opens up the possibility for remote humidity measurements.",

author = "Shuai Yuan and Tiejun Wang and Peifen Lu and \{Leang Chin\}, See and Heping Zeng",

year = "2014",

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doi = "10.1063/1.4867267",

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T1 - Humidity measurement in air using filament-induced nitrogen monohydride fluorescence spectroscopy

AU - Yuan, Shuai

AU - Wang, Tiejun

AU - Lu, Peifen

AU - Leang Chin, See

AU - Zeng, Heping

PY - 2014/3/3

Y1 - 2014/3/3

N2 - Strong fluorescence emissions from nitrogen monohydride (NH) free radical at 336 nm were observed in air, when water vapor was present in a 400 nm femtosecond laser filament. The generated NH radical is ascribed to chemical reaction between nitrogen and water vapor during laser filamentation. The backscattered fluorescence from NH shows an exponential increase with increasing filament length, indicating amplified spontaneous emission. The fluorescence intensity of NH was found to be linearly dependent on the relative humidity around the filament region, and a record of NH fluorescence detection at 2 m was achieved, which opens up the possibility for remote humidity measurements.

AB - Strong fluorescence emissions from nitrogen monohydride (NH) free radical at 336 nm were observed in air, when water vapor was present in a 400 nm femtosecond laser filament. The generated NH radical is ascribed to chemical reaction between nitrogen and water vapor during laser filamentation. The backscattered fluorescence from NH shows an exponential increase with increasing filament length, indicating amplified spontaneous emission. The fluorescence intensity of NH was found to be linearly dependent on the relative humidity around the filament region, and a record of NH fluorescence detection at 2 m was achieved, which opens up the possibility for remote humidity measurements.

UR - https://www.scopus.com/pages/publications/84896756270

U2 - 10.1063/1.4867267

DO - 10.1063/1.4867267

M3 - 文章

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SN - 0003-6951

VL - 104

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 9

M1 - 091113

ER -

Humidity measurement in air using filament-induced nitrogen monohydride fluorescence spectroscopy

Abstract

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