The non-single resonance characteristics appear by forming proper impedance matching layers on the radiative surface of longitudinal mode piezoelectric transducer.
在复合棒纵向换能器的辐射端加上适当材料的阻抗匹配层，可以使其工作在非单谐振状态下。
2
In this paper, the influence of the pumping noise and the spontaneously radiative noise on the threshold behaviour for the single mode dye lasers has been analysed by making use of WKB theory.