Qing Jie, Niu Xinjian, Liu Yinghui, Guo Guo, Li Hongfu
University of Electronic Science and Technology of China, Chengdu 610054, China.
Rev Sci Instrum. 2022 Jul 1;93(7):074704. doi: 10.1063/5.0099999.
This paper proposes a new way to improve the tuning range of the extended interaction oscillator (EIO). Compared with the conventional EIO structure, the fundamental wave changes from the forward wave to the backward wave when the circuit structure changes from the strong-coupling characteristic of the grating to the weak-coupling characteristic. Simultaneously, the tuning range of the EIO can be greatly enhanced by mechanically tuning the coupling cavity. The results show that, compared with the strong-coupling structure of the grating, the extended interaction oscillation circuit has stronger dispersion sensitivity and greater frequency tuning characteristics under the weak-coupling characteristics of the grating. By mechanically tuning the width of the coupling cavity by 0.8 mm, its center frequency can be varied by 9.5 GHz. This paper also studies and compares the electronic displacement jump phenomenon that occurs in the mechanical tuning process. Similar to the electronic voltage tuning, the output dips suddenly at the operating point of the coupling mismatch. The effective output can be obtained by changing the operating mode in conjunction with electronic tuning. This article provides a new reference method for expanding the tuning range of the extended interaction oscillator.
本文提出了一种提高扩展互作用振荡器（EIO）调谐范围的新方法。与传统的EIO结构相比，当电路结构从光栅的强耦合特性转变为弱耦合特性时，基波从正向波变为反向波。同时，通过机械调谐耦合腔，可以大大提高EIO的调谐范围。结果表明，与光栅的强耦合结构相比，扩展互作用振荡电路在光栅的弱耦合特性下具有更强的色散敏感性和更大的频率调谐特性。通过将耦合腔的宽度机械调谐0.8毫米，其中心频率可变化9.5吉赫兹。本文还研究并比较了机械调谐过程中出现的电子位移跳变现象。与电子电压调谐类似，在耦合失配的工作点处输出会突然下降。通过结合电子调谐改变工作模式可以获得有效输出。本文为扩展扩展互作用振荡器的调谐范围提供了一种新的参考方法。
