该方法降低了击穿阈值，提高了烧蚀效率，并能够延长等离子体的寿命。
The method of the invention can reduce the breakdown threshold, increase the ablation efficiency and prolong the life of plasma.
研究了介质所含杂质悬浮颗粒的大小和介质本身化学结构特性对光学击穿阈值的影响。
The influences of the size of suspended particles in the medium and chemical structural characteristics of the medium on the threshold of the optical breakdown are researched experimentally.
通过净化介质可提高光学击穿阈值，进而提高相位共轭保真度、能量反射率及其稳定度等SBS特性。
By purifying the medium, the optical breakdown threshold can be increased; thus the phase-conjugation fidelity, the reflectivity of the energy and the stability of SBS increase correspondingly.
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