The last decade has witnessed tremendous progress in research on optical frequency
metrology. Optical frequency standards using optical lattice and single-ion trap technologies …

Optical lattice clocks surpass primary Cs microwave clocks in frequency stability and
accuracy, and are promising candidates for a redefinition of the second in the International …

There is an increasing demand for precise molecular spectroscopy, in particular in the mid-
infrared (MIR) fingerprint window that hosts a considerable number of vibrational signatures …

We report an uncertainty evaluation of an 171 Yb optical lattice clock with a total fractional
uncertainty of 3.6× 10-16, which is mainly limited by the lattice-induced light shift and the …

We used precision spectroscopy to analyze the R (53) 24-1, P (49) 24-1, and R (95) 25-1
lines of molecular iodine (^ 127I_2) to establish optical frequency references for the laser …

We performed Doppler-free spectroscopy on the P (40) 52-0 and P (52) 53-0 lines of
molecular iodine (127 I 2) near the 1 S 0-3 P 2 metastable transition of Yb at 507 nm. The …

Frequency-stabilized lasers are of considerable interest not only for the implementation of
time and length standards but also as tools to study atoms and molecules. The absolute …

Frequency-stabilized lasers are fundamental topics in research relating to optical frequency
and wavelength standards. The absolute frequencies and hyperfine structures of the R (106) …

We present a simple scheme that enables us to automatically relock optical phase locking.
Our servo system consists of an analog loop filter for the fast feedback control of a high …

We investigate 13 hyperfine structures of transition lines of 127 I 2 near 554 nm, namely, the
R (50) 22-0, P (46) 22-0, P (121) 24-0, P (69) 25-1, R (146) 25-0, R (147) 28-1, P (160) 26-0 …