Spectral lamp for rubidium atomic frequency standard

Abstract

The invention discloses a spectral lamp for a rubidium atomic frequency standard. A sapphire glass sheet is adhered into a glass sheet clamping opening in the top of a lamp base cover through silicone rubber. A coupling coil is closely wound on the upper part of a bulb. One end of the coupling coil is welded with a core wire of a coaxial wire, and the other end of the coupling coil is welded with the outer wall of the coaxial wire. The coaxial wire penetrates through the lamp base cover, a transition circuit board, a shielding box and a radio frequency circuit board, and is welded at the ground ends of the transition circuit board and the radio frequency circuit board. The lamp base cover is fixedly arranged on the transition circuit board through screws. Leading wires of a heating coil and a temperature sensing element are welded on the transition circuit board. The lamp base cover is fixedly arranged on the transition circuit board through the screws at the bottom of the lamp base cover. The transition circuit board is fixedly arranged on a lamp bracket through screws. The lamp bracket is fixedly arranged on the shielding box through screws. The radio frequency circuit board is fixedly arranged in the shielding box through screws. The spectral lamp is simple in structure, easy to machine, stable in performance and high in environmental adaptability, and can be directly applied to the rubidium atomic frequency standard.

Description

technical field [0001] The invention relates to the field of spectral lamps, in particular to a spectral lamp for rubidium atomic frequency standards, which can be directly used in rubidium atomic frequency standards used in various strict environments (such as spaceborne environments). Background technique [0002] The rubidium atomic frequency standard is widely used due to its small size, low power consumption and good stability, especially in the fields of satellite positioning and navigation. It is mainly composed of physical system and circuit. The former provides a reference frequency as a frequency discriminator, and the latter is equivalent to a frequency-locked loop to lock the output frequency of the VCO on the reference frequency of the physical system. The physical system can be roughly divided into two parts: the spectral lamp and the cavity system. After the light emitted by the spectral lamp is filtered, the 87Rb atoms in the ground state hyperfine energy l...

AI Technical Summary

Problems solved by technology

The stability of the light emission of the spectrum lamp directly affects the stability of the atomic transition signal, thus affecting the performance of the frequency standard machine

[0003] The traditional rubidium atomic frequency standard has a relatively mature design scheme for spectral lamps, but it is only designed for general atmospheric environments, and problems such as vacuum overheating and low-pressure discharge lamps will occur in spaceborne environments

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