原子钟又称原子频标,是提供标准频率和时间的设备,在宇航、卫星发射等国防和民用领域有十分重要的使用价值。而日前较为成熟的三种原子钟中,只有铷原子钟易于制造,且体积小、用途广、价格低。但此前它的性能较另两种原子钟差,主要缺点是输出频率老化漂移,精度一般为3000年误差1至5秒,影响了它在许多高科技领域的应用。北大电子学系董太乾教授等从1973年开始研制铷原子钟,立志攻克老化漂移难关,并先后与电 Atomic clock, also known as atomic frequency standard, is a device that provides standard frequency and time. It has very important use value in national defense and civil fields such as space flight and satellite launch. The more mature three atomic clocks, only the rubidium atomic clock easy to manufacture, and small size, wide use, low prices. However, its performance before the other two atomic clock worse, the main drawback is the output frequency aging drift, the accuracy is generally 3000 years of error 1 to 5 seconds, affecting its application in many high-tech fields. Peking University Department of Electronics, such as Professor Dong Taigan rubidium atomic clock since 1973, determined to overcome the difficulties of aging drift, and one after another with electricity