论文部分内容阅读
我们对氮化铌(NbN)热电子测热辐射计(Hot Electron Bolometer,简称:HEB)的太赫兹(Terahertz,简称:THz)混频器的稳定性进行了研究,并探讨了相应的简易稳定方法.我们测量了HEB THz混频器在4.2K温度下使用0.65THz本振源(Local Oscillator,简称:LO)的中频输出.为了稳定混频器的工作点,我们采用了一个具有微波补偿功能的反馈回路.在这个反馈回路里,我们使用的微波补偿频率(10GHz)远远低于NbN HEB混频器的工作频率(0.65THz),以补偿混频器的THz LO功率波动.这使系统的艾伦时间(Allan time)增加到22s以上,从而改善了系统的稳定性.
We studied the stability of the terahertz (THz) mixer of the niobium nitride (NbN) hot electronon bolometer (abbreviated: HEB), and discussed the simple and stable Method We measured the IF output of the HEB THz mixer using a 0.65 THz Local Oscillator (LO) at a temperature of 4.2 K. To stabilize the mixer operating point, we used a microwave compensation function In this feedback loop, we use a microwave compensation frequency (10GHz) that is much lower than the operating frequency (0.65THz) of a NbN HEB mixer to compensate for the mixer’s THz LO power fluctuations.This allows the system Allan time increased to over 22s, improving system stability.