TWO-PHOTON ABSORPTION SPECTROSCOPY OF A ¹³CO₂ VIBRATIONAL TRANSITION

Liu, Yu-Zhong

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https://hdl.handle.net/2142/122363 Copy

Description

Title

TWO-PHOTON ABSORPTION SPECTROSCOPY OF A ¹³CO₂ VIBRATIONAL TRANSITION

Author(s)

Liu, Yu-Zhong

Contributor(s)

• Hu, Shui-Ming
• Cheng, Cunfeng

Issue Date

2023-06-20

Keyword(s)

Instrument/Technique Demonstration

Abstract

Two-photon absorption spectroscopy is an ideal method for precision measurements of molecular energy levels and trace gas concentration. We report a two- photon absorption of the Q(36) rovibrational transition of ¹³CO₂, measured by cavity- enhanced absorption spectroscopy (CEAS) at λ = 2.8 µm. The high signal-to-noise ratio of two-photon absorption spectra was obtained by optical locking of a narrow-linewidth mid-infrared laser to a high finesse cavity. One longitudinal mode of the cavity was shifted to scan the frequency, calibrated by an optical frequency comb. We studied the properties of the two-photon absorption spectrum. It is expected that this method can be applied in the field of molecular frequency reference and high-sensitivity detection.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Handle URL

https://hdl.handle.net/2142/122363

DOI

https://doi.org/10.15278/isms.2023.6695

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