Atomic clock

Abstract

The invention discloses an atomic clock comprising an electronic system and a physical package. The physical package comprises a laser, a conversion optical path, a 1 / 4th wave plate, an alkali atomic bulb gas chamber and a photoelectric detector. The atomic clock is characterized in that the conversion optical path includes a four-port fiber coupler, four optical fibers connected with the fiber coupler, a self-focusing lens and a reflection enhancement film; the output end of the laser is connected with the first optical fiber, the second optical fiber is connected to the self-focusing lens, and the third optical fiber is connected with the photoelectric detector; the reflection enhancement film is arranged on the emergent side of the alkali atomic bulb gas chamber and reflects outgoing light back to the alkali atomic bulb gas chamber. The atomic clock has the advantages that the laser and the photoelectric detector are far away from the alkali atomic bulb gas chamber and experience less influence from temperature and magnetic field, and the atomic clock is more stable.

Description

technical field [0001] The invention relates to an atomic clock and belongs to the field of frequency standard devices. Background technique [0002] The history of the development of atomic clocks can be traced back to around the Second World War, which mainly benefited from the rapid development of quantum mechanics and microwave spectroscopy at that time. Early microwave clocks used incoherent light sources for pumping and probing light. Later, with the development of lasers, laser state selection and detection methods were applied to the research of atomic clocks, and better results were obtained. [0003] With the rapid development of electronic technology and control technology, research on atomic clocks mainly focuses on two aspects: one is to explore and develop atomic clocks with higher accuracy and stability. In recent years, many different types of new atomic clocks with higher accuracy and stability have been successfully developed, such as cold atomic fountain ...

AI Technical Summary

Problems solved by technology

[0007] In practice, the general CPT desktop experimental system only pursues the aspect of commissioning, and does not consider the issue of size and power consumption, while the miniature or even chip-level CPT atomic clocks really pay attention to the reduction of size and power consumption, but it is not convenient for commissioning

The CPT atomic clock indicators achieved so far are not very high, mainly due to the serious temperature drift phenomenon, high power consumption caused by temperature control, and the stability of the atomic clock output signal is very low

The main reason is that the above-mentioned parts are packaged together in the prior art, and the distance between the laser and the photodetector and the alkaline atomic bubble chamber is usually kept at a working temperature of 70-90°C. Closer, will be affected by its temperature,

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