245 citations · 593 across the 7 of their papers we have counts for
7 papers
Gallium-nitride-based interference-filter-stabilized external cavity diode laser with a surface-activated-bonded output coupler
Hisashi Ogawa, Tatsuya Kemmochi, Tetsushi Takano
We report on an interference-filter-stabilized external cavity diode laser using a gallium-nitride-based violet laser diode. Surface-activated-bonded glass substrates were employed…
10 W injection-locked single-frequency continuous-wave titanium:sapphire laser
Tetsushi Takano, Hisashi Ogawa, Chiaki Ohae +1
High-power tunable lasers with good longitudinal and transverse modes are fundamental tools for exploring quantum physics. Here we report a high-power continuous-wave injection-loc…
Precise determination of the isotope shift of Sr - Sr optical lattice clock by sharing perturbations
Tetsushi Takano, Ray Mizushima, Hidetoshi Katori
We report on the isotope shift between Sr and Sr on the clock transitions. The interleaved operation of an optical lattice clock with two isot…
Real-time geopotentiometry with synchronously linked optical lattice clocks
Tetsushi Takano, Masao Takamoto, Ichiro Ushijima +7
According to the Einstein's theory of relativity, the passage of time changes in a gravitational field. On earth, raising a clock by one centimetre increases its tick rate by 1.1 p…
Frequency ratios of Sr, Yb and Hg based optical lattice clocks and their applications
Masao Takamoto, Ichiro Ushijima, Manoj Das +8
This article describes the recent progress of optical lattice clocks with neutral strontium (Sr), ytterbium (Yb) and mercury (Hg) atoms. In particular, we pr…
Lamb-Dicke spectroscopy of atoms in a hollow-core photonic crystal fibre
Shoichi Okaba, Tetsushi Takano, Fetah Benabid +6
Unlike photons, which are conveniently handled by mirrors and optical fibres without loss of coherence, atoms lose their coherence via atom-atom and atom-wall interactions. This de…
Direct Comparison of Distant Optical Lattice Clocks at the Uncertainty
Atsushi Yamaguchi, Miho Fujieda, Motohiro Kumagai +7
Fiber-based remote comparison of Sr lattice clocks in 24 km distant laboratories is demonstrated. The instability of the comparison reaches over an averagi…