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业已研制出一种小型通用铷气泡频率标准,来满足在各种应用中对精密振荡器日益增长的需要。本文介绍一种新的已研制成功的频率标准的设计原理和性能特性。新型铷频率标准在电气和结构设计上都体现了新的特点和改进,例如,不带滤光泡的小型双气泡型光学微波部件,采用了许多集成电路的一种改进型的伺服电子仪器,而且采用了母板和插入式组件,因此结构简单,适于制作。由于在吸收泡内采用了天然铷来取代同位素R_b~(87),因此,取消了滤光泡,实现了光学微波部件的小型化。上述特点使新型铷频率标准具有体积小(2升)、重量轻(2.9公斤)和工作温度范围宽(-20℃—+60℃)的特点。已经进行一系列测量来表征新型铷频率标准的性能。尽管尺寸已显著缩小,但是和实验室所使用的大得多的铷频率标准相比较,它已显示出极好的长期、短期稳定度和在长期工作条件下具有高的环境稳定性。
A small, universal rubidium bubble frequency standard has been developed to meet the growing need for precision oscillators in a variety of applications. This article describes a new design principle and performance characteristics of a frequency standard that has been successfully developed. The new rubidium frequency standard reflects both new electrical characteristics and structural improvements, such as small double-bubble optical microwave components without filter foam, an improved servo-electronic instrument that incorporates many integrated circuits, And the use of motherboards and plug-in components, so the structure is simple, suitable for production. Because of the use of natural rubidium instead of the isotope R_b ~ (87) in the absorption bubble, the filter foam is eliminated and the miniaturization of the optical microwave components is achieved. The above features make the new rubidium frequency standard small size (2 liters), light weight (2.9 kg) and wide operating temperature range (-20 ° C - + 60 ° C). A series of measurements have been conducted to characterize the performance of the new rubidium frequency standard. Although significantly reduced in size, it has demonstrated excellent long-term, short-term stability and high environmental stability over long-term operating conditions compared to the much larger rubidium frequency standard used in laboratories.