Dual-wavelength good-and-bad-cavity active optical clock based on secondary cavity locking technology, and implementation method thereof

Abstract

The invention discloses a dual-wavelength good-and-bad-cavity active optical clock based on the secondary cavity locking technology, and an implementation method thereof. The dual-wavelength good-and-bad-cavity active optical clock and the implementation method thereof have the advantages that a solution based on the secondary cavity locking technology is provided, the cavity traction suppressioneffect of bad cavity lasers in a dual-wavelength good-and-bad-cavity laser system is utilized twice, the influences of the residual cavity traction effect on the long-term stability of an active optical frequency standard are eliminated, the cavity traction suppression effect is amplified to squared times of the bad cavity coefficient of a main resonant cavity, the length of the main resonant cavity is locked twice by a servo feedback system, and the immunity of the active optical frequency standard in the dual-wavelength good-and-bad-cavity system to cavity mold jittering is achieved.

Description

technical field [0001] The invention belongs to the technical field of atomic clocks and frequency standards, and in particular relates to a dual-wavelength active optical clock based on secondary lock cavity technology and a realization method thereof. Background technique [0002] Precise time and frequency standards, namely atomic clocks, have important applications in precision measurement, information network time synchronization, international standard time coordination, global navigation and positioning systems, etc. Therefore, in the field of metrology, atomic clocks have always been one of the key research directions. Especially in the past ten years, the field of optical frequency metrology has developed rapidly. At present, the performance of optical frequency atomic clocks has surpassed microwave atomic clocks. The stability and accuracy of optical frequency atomic clocks (optical clocks) realized by optical lattice and single ion trapping technology degree has r...

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Problems solved by technology

[0005] At present, the four-level active optical clock realized by thermal atoms has proved that the cavity pulling effect can be effectively suppressed, thereby reducing the influence of cavity length thermal noise on the output laser frequency, but because the active optical clock resonator (main resonator) is not locked ) cavity length, the cavity length is greatly affected by external noise, and the output bad cavity laser is still limited by the influence of the residual cavity pulling effect, so that the output laser line width cannot be further narrowed, and it cannot be used as an optical frequency standard, and the active light is not fully utilized. bell advantage

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