M. V. Okhapkin

Femtosecond optical clock with the use of a frequency comb

The principles of precision measurement of frequency intervals in optical range with the help of femtosecond lasers are described. An experimental scheme of femtosecond optical clock is described. The characteristics of the basic elements and units of the setup are presented. The results of a broadened spectrum researches with the help of tapered fibers are reported.

Optical frequency standard with ytterbium single ion

We report on the progress in development of a highly accurate optical frequency standard based on the single ion of ytterbium-171 at the Institute of Laser Physics, Novosibirsk.

Frequency-stable Nd:YAG lasers in Michelson — Morley experiment

Results of frequency stability of Nd:YAG lasers locked to resonances of high-Q Fabry-Perot sapphire interferometers are reported. The interferometers were mounted on a platform cooled down to the cryogenic temperature; this ensured high long-term laser stability in the Michelson-Morley experiment.

Tunable single-frequency diode-pumped, intracavity-doubled, traveling-wave Nd:YAG and Yb:YAG lasers

Single-frequency traveling-wave Nd:YAG and Yb:YAG lasers combining the functions of intracavity second harmonic generation and birefringent filter on one nonlinear crystal are discussed. The lasers were developed for spectroscopy and metrology applications. Output characteristics and spectral tuning ranges of the lasers are presented.

Femtosecond optical clock

An experimental scheme of femtosecond optical clock is described. The characteristics of the elements and blocks of the setup are given. Possible application areas of the optical clock described are discussed.

Absolute frequency measurements in precision laser spectroscopy of muonium

Frequency standard at 732 nm for absolute measurements of the muonium 1S-2S transition frequency has been developed. A suitable reference line for that standard was found in the absorption spectra of the iodine vapor heated up to 600 degree(s)C. In order to measure the absolute frequency of the developed standard, an optical synthesis chain was built up. The frequencies to be measured were synthesized from two secondary standard frequencies: a frequency of the diode laser stabilized to rubidium absorption line and a frequency of the CO2 laser, locked to CO2 absorption line. An accuracy of the measurements is order 10

Optical frequency standard based on a Nd:YAG laser stabilised by saturated absorption resonances in molecular iodine using second-harmonic radiation

min9.