THE RESEARCH ON THE KEY TECHNIQUE OF THE PHYSICS PACKAGE OF RUBIDIUM ATOMIC CLOCK

The physics package of the rubidium atomic clock is the discriminator of the atomic clock, determining the stability, accuracy and the aging rate of the rubidium atomic clock. To improve the stability is the key technique for the physics package of rubidium atomic clock. The optimizing design technique and optics filter technique were adopted in this paper to improve the short term stability of rubidium atomic clock. The parameter optimization technique was applied to get the zero light shift (ZLS) and zero temperature coefficient (ZTC) condition that are close to the superposition. On the bases of the design, the light shift, collision shift and microwave power shift were synthesized as temperature coefficient while the corresponding approach was offered. By this way the long term stability of rubidium atomic clock is improved. The stability of the rubidium atomic clock was improved in large extent with application of above research. Its short term stability sigma(y)(1s) can be below 3x10(-12), while the stability sigma(y)(1day) can be better than 3x10(-14).