Precise Frequency Measurements Of The 2ν<sub>3</sub> A<sub>1</sub> - ν<sub>3</sub> Band Transitions Of Methane With Comb-referenced Infrared-infrared Double-resonance
Sasada, Hiroyuki
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https://hdl.handle.net/2142/111265
Description
Title
Precise Frequency Measurements Of The 2ν3 A1 - ν3 Band Transitions Of Methane With Comb-referenced Infrared-infrared Double-resonance
Author(s)
Sasada, Hiroyuki
Contributor(s)
Okuda, Shoko
Inaba, Hajime
Okubo, Sho
Issue Date
2021-06-23
Keyword(s)
Mini-symposium: Precision Spectroscopy for Fundamental Physics
Date of Ingest
2021-09-24T21:09:23Z
2022-01-21T16:10:18Z
Abstract
We have carried out infrared-infrared double-resonance spectroscopy of the 2\nub{3} A$_{1}$ - \nub{3} band of methane. The \nub{3} band transitions are pumped using a 90.5 THz difference-frequency-generation (DFG) source frequency-controlled with an optical frequency comb (OFC), and ten tetrahedral components of the Q(1) to Q(4) transitions from the pumped levels are observed with a half-width at half maximum of 0.43 MHz using another 88.5 THz DFG source. The transition frequencies are determined with an uncertainty of 10 kHz using the OFC.
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