时间频率标准

ZEEMAN频率是氢脉泽时间频率标准的一个重要工作参数，为此上海天文台研制了一种专用的数字频率合成器，用来测量ZEEMAN频率。

The ZEEMAN frequeney is one of important working parameters of hydrogen maser frequency standards , so a special digital time and frequency synthesizer , which is used to measure ZEEMAN frequencies , was developed .

FT－时间频率标准装置的误差来源及其测量

The source of the error and its measurement of FT-time and frequency standard apparatus

窄线宽激光器在高灵敏高分辨率激光光谱研究、基本物理常数的测定、狭义相对论的检验等领域有着广泛的应用，同时又是作为未来时间频率标准-光钟的关键组成部分。

When a narrow-linewidth laser is transferred through optical fiber , the optical phase of the light in the fiber is extremely sensitive to environmental perturbations like pressure , temperature , etc.

我们组建的时间频率标准自动测试系统和时间频率标准相位比较测量系统，其准确度分别为1×10-12和2×10-14/d。

The automatic test system and phase comparison measurement system for time / frequency standards are constructed by us . Their accuracy is 1 × 10-12 and 2 × 10-14 / d. respectively .