Two-photon absorption spectroscopy of rubidium with a dual-comb technique

Nishiyama, Akiko

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https://hdl.handle.net/2142/97166 Copy

Description

Title

Two-photon absorption spectroscopy of rubidium with a dual-comb technique

Author(s)

Nishiyama, Akiko

Contributor(s)

• Minoshima, Kaoru
• Nakajima, Yoshiaki
• Hariki, Takuya
• Yoshida, Satoru

Issue Date

2017-06-22

Keyword(s)

Instrument/technique demonstration

Abstract

"Dual-comb spectroscopies have great potential for high-resolution molecular and atomic spectroscopies, thanks to the broadband comb spectrum consisting of dense narrow modes\footnote{A. Nishiyama, S. Yoshida, Y. Nakajima, H. Sasada, K. Nakagawa, A. Onae, K. and Minoshima, Opt. Express 24, 25894 (2016).}. In this study, we apply the dual-comb system to Doppler-free two-photon absorption spectroscopy. The outputs of two frequency combs excite several two-photon transitions of rubidium\footnote{A. Hipke, S. A. Meek, T. Ideguchi, T.W. H\""{a}nsch, and N. Picqu\'{e}, Phys. Rev. A 90, 011805(R) (2014).}, and we obtained broadband Doppler-free spectra from dual-comb fluorescence signals. The fluorescence detection scheme circumvents the sensitivity limit which is effectively determined by the dynamic range of photodetectors in absorption-based dual-comb spectroscopies. Our system realized high-sensitive, Doppler-free high-resolution and broadband atomic spectroscopy._x000d_ \begin{wrapfigure}{r}{0pt} \includegraphics[scale=0.9]{figure5.eps} \end{wrapfigure}_x000d_ _x000d_ A part of observed spectra of 5S$_{1/2}$ - 5D$_{5/2}$ transition is shown in the figure. The hyperfine structures of the $\it {F""}$ = 1 - $\it{F'}$ = 3,2,1 transitions are fully-resolved and the spectral widths are approximately 5 MHz. The absolute frequency axis is precisely calibrated from comb mode frequencies which were stabilized to a GPS-disciplined clock._x000d_ _x000d_ This work was supported by JST through the ERATO MINOSHIMA Intelligent Optical Synthesizer Project and Grant-in-Aid for JSPS Fellows (16J02345)."

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/97166

DOI

https://doi.org/10.15278/isms.2017.RI02

Copyright and License Information

Copyright 2017 Akiko Nishiyama

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