High‐stability optical frequency transfer with all‐fiber architecture for optical lattice clocks

Abstract

We have developed a laser distributor for highly accurate optical frequency transfer of optical lattice clocks. Each output has a phase stabilizer based on a Michelson interferometer with all‐fiber architecture. Varying the optical path length in the residual uncontrolled optical path to introduce phase noises between output branches, we found the residual frequency transfer instability to be much smaller than the frequency instability of current optical lattice clocks. All fiber configuration provides robustness, which allows optical lattice clocks to be used in wide range of applications not only in a laboratory, but also outside laboratory, for example, geodetic applications.

Transportable Strontium Optical Lattice Clocks Operated Outside Laboratory at the Level of 10−18 Uncertainty

“…All‐fiber architecture shown in Figure 5c offers no degradation in optical alignment, and robust and stable laser frequency distribution as described in ref. [39].…”

Prompt Frequency Stabilization of Ultra-Stable Laser via Improved Mean Shift Algorithm

“…As the ultra-stable laser have the characteristics of high-frequency stability, it hasthey have been applied in many scientific research fields, such as optical clocks [1][2][3], gravitational wave detection [4][5][6][7], fundamental physical constant measurements [8][9][10], geodesy [11], low-noise microwave signal generation [12][13][14][15] and optical frequency transfer [16,17]. While most of the present ultra-stable laser systems can only be implemented in the laboratory, various applications demand the ultra-stable laser that can be utilized more extensively in the field or mobile platforms, even in space.…”

A transportable optical lattice clock at the National Time Service Center*

“…[3][4][5][6][7] As one of the candidates for the next-generation time-frequency standard, atomic optical clocks have been developed in many laboratories. [1,[8][9][10][11][12] The optical clocks can be used for high precision tests of fundamental physics constants, [13,14] chronometric leveling-based geodesy, [15] gravitational wave detection, [16] topological dark matter hunting, [17] frequency metrology, and timekeeping. [18] Most of the optical clocks are confined in laboratories due to their complicated and bulky experimental apparatuses, which limit the application of the optical clocks in scientific research and engineering.…”