时间频率学报

简单介绍了被动型氢钟的量子系统,阐述了波谱信号观测装置的设计。该装置采用标准10MHz晶振产生被动型氢钟的微波激射信号(1.420406GHz),然后将该信号输入氢钟的脉泽振荡器中。脉泽振荡器输出的信号经过低噪声放大、两次混频及滤波后所得的谱线包含了量子系统的信息,通过分析最终的谱线即可得知量子系统的优劣。该装置已用于对两台被动型氢钟的测试,并根据测试结果对量子系统进行了改进。

The quantum system of the passive hydrogen maser is introduced briefly and a design of the spectrum observing device is expounded.The 10MHz crystal oscillator is adopted to supply the passive hydrogen maser with microwave signal(1.420406GHz)which is input to the maser oscillator.The output signal from the maser oscillator is amplified with low noise,mixed twice and filtered,and the final spectrum which contains the information of quantum system is analysed so as to help one to learn the quantum system's performance.The spectrum observing device has been applied to the tests of two passive hydrogen masers and the quantum systems have been improved based on the tests.