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One of the key parts of laser system of atomic gravimeter based on cold atoms is investigated. In order to construct optical system of atomic gravimeter the laser offset frequency stabilization is needed. Method for frequencydoubled fiber laser’s offset frequency stabilization is suggested and developed. This method is based on modulation transfer spectroscopy and the usage of fiber electro-optical modulator. The experimental scheme of this method is described. The error signals for offset frequency stabilization of frequency-doubled fiber laser are obtained. In order to maximize error signal’s amplitude, experimental parameters such as cell’s temperature, pump and probe beam intensities and electrooptical modulators signal amplitudes are optimized. The influence of polarization on error signal’s amplitude is investigated. It is shown that circular polarization allows to achieve error signal with higher amplitude. The achieved results can be applied to the construction of quantum gravimeter, quantum frequency standards and to the laser cooling experiments.

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A review of the experimental results achieved in the process of atomic fountain clocks construction at “VNIIFTRI” is presented. A possibility of the application of achieved results to the development of a sensitive interferometer (gravimeter) based on cold rubidium atoms is analyzed. The relevance of the study is in the estimation of perspective of interferometer (gravimeter) based on cold atoms for absolute measurements of local free-falling constant development. Physical fundamentals of atomic gravimeter’s operation are described. A comparison between atomic gravimeter and atomic quantum frequency standard based on cold atoms is done. Engineering solutions, that are necessary for building atomic gravimeter with required sensitivity of free-falling acceleration measurement are suggested. In order to build a gravimeter with a sensitivity reaching 1 μGal/Hz1/2 the estimations of laser phase noise, residual gas pressure in vacuum system and magnetic shielding system’s parameters are made.