摘要
为了获得光纤传输高功率脉冲激光的主要特性,对光纤传能进行了理论分析和实验研究。结论是:光纤宏观弯曲对传输效率有比较明显的影响:光纤的芯径、数值孔径(NA)、长度等指标对高功率激光传输效率有很大影响;当传输激光功率大于某个闽值后,光纤内产生的受激拉曼散射(SRS)和受激布里渊散射(SBS)影响激光能量输出;光纤的端面质量限制了传输激光功率的提高,根据ISO11254(光学元件表面激光诱导损伤的光学测试方法)得出光纤的激光零损伤概率阈值可以达到58.6J/cm2;光纤输出光束截面能量分布被匀化。
In order to investigate the main influencing factors in power delivery fibers for high power laser transmission, the power delivery characteristics were analyzed by theory and experiments. The results show that the fiber core diameter, NA, length and so on affect the transmission efficiency for high power laser; When the laser power is beyond some threshold, the SRS and SBS will be serious; the quantity of fiber end - faces limits to the raising of laser power passing through fibers; the zero probability damage threshold is calculated according to ISO11254, that is 58.6J/cm^2;Energy distribution of output beam from fibers becomes uniform.
出处
《激光杂志》
CAS
CSCD
北大核心
2008年第1期60-62,共3页
Laser Journal
基金
国防预研项目(51305070402)
关键词
高功率激光
光束传输
非线性效应
传能光纤
激光诱导损伤
high power laser
beam delivery
non- linear effects
power delivery fibers
laser- induced damage
