激光杂志
激光雜誌
격광잡지
LASER JOURNAL
2014年
6期
60-61,65
,共3页
激光诱导损伤%熔石英%激光等离子体%热力学效应
激光誘導損傷%鎔石英%激光等離子體%熱力學效應
격광유도손상%용석영%격광등리자체%열역학효응
Laser-induced damage%Fused silica%Laser plasma%Thermodynamic effect
利用纳秒激光脉冲辐照熔石英玻璃产生击穿的方法，仔细观测了熔石英表面损伤的微观形貌，并基于激光击穿过程的热力学效应对损伤机理进行了研究。研究表明：激光脉冲能量的沉积主要是基于激光等离子体的逆韧致吸收效应，高温高压等离子体是导致熔石英玻璃损伤的主要因素；熔石英玻璃在击穿过程中伴随着温度升高、材料熔化、气化以及电离等过程，这些效应使得玻璃发生相变以及断裂，而冲击波效应会使得相变材料发生去除辐照区周围玻璃发生剥离而形成大范围的坑状破坏点。
利用納秒激光脈遲輻照鎔石英玻璃產生擊穿的方法，仔細觀測瞭鎔石英錶麵損傷的微觀形貌，併基于激光擊穿過程的熱力學效應對損傷機理進行瞭研究。研究錶明：激光脈遲能量的沉積主要是基于激光等離子體的逆韌緻吸收效應，高溫高壓等離子體是導緻鎔石英玻璃損傷的主要因素；鎔石英玻璃在擊穿過程中伴隨著溫度升高、材料鎔化、氣化以及電離等過程，這些效應使得玻璃髮生相變以及斷裂，而遲擊波效應會使得相變材料髮生去除輻照區週圍玻璃髮生剝離而形成大範圍的坑狀破壞點。
이용납초격광맥충복조용석영파리산생격천적방법，자세관측료용석영표면손상적미관형모，병기우격광격천과정적열역학효응대손상궤리진행료연구。연구표명：격광맥충능량적침적주요시기우격광등리자체적역인치흡수효응，고온고압등리자체시도치용석영파리손상적주요인소；용석영파리재격천과정중반수착온도승고、재료용화、기화이급전리등과정，저사효응사득파리발생상변이급단렬，이충격파효응회사득상변재료발생거제복조구주위파리발생박리이형성대범위적갱상파배점。
The nanosecond laser pulse has been used to induce breakdown on the fused silica glass, furthermore, the micro-morphology of damaged fused silica glass has been observed carefully, and the damage mechanism has been studied based on thermodynamic effects. The result shows:the laser pulse energy deposition is mainly due to la-ser-plasma inverse bremsstrahlung absorption effect, high pressure and high temperature plasma is the main factor for the destruction of fused silica glass;The breakdown of fused silica glass involves the rise of breakdown tempera-ture, the melting the material, vaporization and ionization and so on, which can make phase transition and fracture of glass, and the shock wave effect make the phase change material removed and the glass surrounding the irradiation can be peeled off, the pit-shaped damage is formed.
