基于共振声谱法，研究了同轴孔隙性圆柱扰动体引起圆柱谐振腔共振频率的偏移。
In this paper, the problem of the acoustic resonant frequency shift of a cylindrical cavity with a coaxial porous sample is discussed on the basis of the resonance acoustic spectroscopy.
基于有差伺服调节技术，实现了外置光学谐振腔的共振频率与钛宝石激光器工作频率的锁定。
With the peak-seeking servo-controlled technology based on a residual error, an external optical cavity can keep in resonance with the frequency of Ti-sapphire laser in the experiment.
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