162 citations · 412 across the 8 of their papers we have counts for
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Absolute frequency measurements and hyperfine structures of the molecular iodine transitions at 578 nm
Takumi Kobayashi, Daisuke Akamatsu, Kazumoto Hosaka +6
We report absolute frequency measurements of 81 hyperfine components of the rovibrational transitions of molecular iodine at 578 nm using the second harmonic generation of an 1156-…
Improved frequency measurement of the - clock transition in Sr using the Cs fountain clock at NMIJ as a transfer oscillator
Takehiko Tanabe, Daisuke Akamatsu, Takumi Kobayashi +10
We performed an absolute frequency measurement of the - transition in Sr with a fractional uncertainty of , which is less than one thi…
Frequency ratio measurement of 171Yb and 87Sr optical lattice clocks
Daisuke Akamatsu, Masami Yasuda, Hajime Inaba +4
The frequency ratio of the 1S0(F=1/2)-3P0(F=1/2) clock transition in 171Yb and the 1S0(F=9/2)-3P0(F=9/2) clock transition in 87Sr is measured by an optical-optical direct frequency…
Spectroscopy and frequency measurement of the Sr clock transition by laser linewidth transfer using an optical frequency comb
Daisuke Akamatsu, Hajime Inaba, Kazumoto Hosaka +5
We perform spectroscopic observations of the 698-nm clock transition in Sr confined in an optical lattice using a laser linewidth transfer technique. A narrow-linewidth lase…
Fiber-comb-stabilized light source at 556 nm for magneto-optical trapping of ytterbium
Masami Yasuda, Takuya Kohno, Hajime Inaba +4
A frequency-stabilized light source emitting at 556 nm is realized by frequency-doubling a 1112-nm laser, which is phase-locked to a fiber-based optical frequency comb. The 1112-nm…
Doppler-free spectroscopy of molecular iodine using a frequency-stable light source at 578 nm
Feng-Lei Hong, Hajime Inaba, Kazumoto Hosaka +2
A stable light source obtained using sum-frequency generation (SFG) is developed for high-resolution spectroscopy at 578 nm. Hyperfine transitions of molecular iodine are observed…