Optical clock based on all-optical frequency stabilization and method of making the same

Abstract

The invention discloses an optical clock based on full-optical frequency stabilization and a manufacturing method of the optical clock. The optical clock comprises a laser device and is characterized in that a quantum optical filter element is disposed inside the laser device and used for feeding the laser in optical frequency band selected by the quantum optical filter element back to laser gain medium, the pass band central frequency of the quantum optical filter element is determined by jump frequency among the atom, molecule or ion energy levels used by the quantum optical filter element, the pass band width of the quantum optical filter element is at least two times of the cavity mold distance of the laser device, and the gain bandwidth of the laser device covers the frequency corresponding to the pass band width. The optical clock has the advantages that the defect that various traditional optical filters cannot provide accurate quantum frequency standard is overcome, and the optical clock is stable in operation and worthy of application.

Description

technical field [0001] The invention belongs to the technical field of atomic clocks and quantum frequency standards, and relates to an all-optical frequency-stabilized optical clock without any electrical feedback and a manufacturing method thereof. [0002] technical background [0003] The current optical frequency standards all use the absorption spectrum signal of the local oscillator laser between the quantum transition levels of atoms, molecules or ions, and the error electrical signal collected by the photodetector is fed back to the frequency control of the local oscillator laser through the electronic circuit. Units, such as laser drive current source, laser cavity length control voltage of piezoelectric ceramics and other circuit technologies. Electric feedback technology is indispensable in the frequency technology of these optical frequency standards. [0004] In addition, although optical feedback is used in external cavity feedback laser technology, the output...

AI Technical Summary

Problems solved by technology

[0004] In addition, although optical feedback is used in external cavity feedback laser technology, the output frequency of such lasers does not have an absolute quantum reference standard based on atoms, molecules or ions (hereinafter referred to as atoms), and its output frequency value varies with the macroscopic Physical quantities such as cavity length, temperature, etc. are fluctuating, so they cannot be used as frequency standards, that is, they are not atomic clocks

[0005] In a word, there has never been any report on the all-optical frequency-stabilized locking optical clock (that is, the quantum frequency standard in the optical band) of the present invention without any electrical feedback from the existing literature.

Images