High-precision nanosecond detection of a gas absorption spectrum based on optical frequency comb time-frequency mapping.
Opt Lett
; 48(8): 2034-2037, 2023 Apr 15.
Article
en En
| MEDLINE
| ID: mdl-37058635
ABSTRACT
There is an increasing demand for high-precision gas absorption spectroscopy in basic research and industrial applications, such as gas tracking and leak warning. In this Letter, a novel, to the best of our knowledge, high-precision and real-time gas detection method is proposed. A femtosecond optical frequency comb is used as the light source, and a broadening pulse containing a range of oscillation frequencies is formed after passing through a dispersive element and a Mach-Zehnder interferometer. Four absorption lines of H13C14N gas cells are measured at five different concentrations within a single pulse period. A single scan detection time of only 5â
ns is obtained along with a coherence averaging accuracy of 0.0055â
nm. High-precision and ultrafast detection of the gas absorption spectrum is accomplished while overcoming complexities related to the acquisition system and light source that are encountered in existing methods.
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
Opt Lett
Año:
2023
Tipo del documento:
Article