CAJ | 학술논문

实验研究了多级声光衍射条件下的最佳声光相互作用长度与声波和光波之间的定量关系。测量结果表明最佳声光相互作用长度与声频紧密相关而几乎与入射光波长及强度无关。实验结果发现当声频低时，相互作用长度短，声频在9 MHz 左右，相互作用长度约为8 mm，当声频降低为6 MHz左右时，相互作用长度约为4 mm。设计了以纯水为介质的声光Q开关器件，在超声频率9 MHz，声功率3.4 W的条件下实现了约98％的总衍射效率。
실험연구료다급성광연사조건하적최가성광상호작용장도여성파화광파지간적정량관계。측량결과표명최가성광상호작용장도여성빈긴밀상관이궤호여입사광파장급강도무관。실험결과발현당성빈저시，상호작용장도단，성빈재9 MHz 좌우，상호작용장도약위8 mm，당성빈강저위6 MHz좌우시，상호작용장도약위4 mm。설계료이순수위개질적성광Q개관기건，재초성빈솔9 MHz，성공솔3.4 W적조건하실현료약98％적총연사효솔。
The experimental investigation on the interaction length for getting the optimum diffraction of the multi-order acousto-optic diffraction is introduced.Measurement results show that best acousto-optic interaction length is closely related to audio frequency,and it is not almost relate to the wavelength and power of the light.When audio frequency is lower,the interaction length became shorter.As audio frequency is about 9MHz,the interaction length is about 8mm,it shrinks to about 4mm at 6MHz of audio frequency.An acousto-optic Q-switch apparatus working with pure wa-ter is designed,and a total diffractive efficiency of about 98%is obtained under the condition of acoustic frequency at 9MHz and acoustic power at 3.4W.