光子学报
光子學報
광자학보
ACTA PHOTONICA SINICA
2009年
10期
2654-2659
,共6页
激光光学%高阶贝塞尔脉冲光束%光谱开关%色散光阑透镜%传输特性
激光光學%高階貝塞爾脈遲光束%光譜開關%色散光闌透鏡%傳輸特性
격광광학%고계패새이맥충광속%광보개관%색산광란투경%전수특성
Laser optics%Higher-order Bessel pulsed beam%Spectral switch%Dispersive aperture lens%Propagation property
研究了高阶贝塞尔脉冲光束通过色散光阑透镜的光谱和时间空间特性.结果表明:脉冲光束在几何焦面上会出现光谱开关,透镜色散使产生光谱开关的临界位置向z轴移动;透镜一阶色散使几何焦面上峰值光强减小,并使脉冲波形产生显著时间移动和展宽,而二阶和高阶色散的影响较小.此外,光束阶数n和空间参量α也会影响横向光强分布.
研究瞭高階貝塞爾脈遲光束通過色散光闌透鏡的光譜和時間空間特性.結果錶明:脈遲光束在幾何焦麵上會齣現光譜開關,透鏡色散使產生光譜開關的臨界位置嚮z軸移動;透鏡一階色散使幾何焦麵上峰值光彊減小,併使脈遲波形產生顯著時間移動和展寬,而二階和高階色散的影響較小.此外,光束階數n和空間參量α也會影響橫嚮光彊分佈.
연구료고계패새이맥충광속통과색산광란투경적광보화시간공간특성.결과표명:맥충광속재궤하초면상회출현광보개관,투경색산사산생광보개관적림계위치향z축이동;투경일계색산사궤하초면상봉치광강감소,병사맥충파형산생현저시간이동화전관,이이계화고계색산적영향교소.차외,광속계수n화공간삼량α야회영향횡향광강분포.
The spectral and spatiotemporal properties of higher-order Bessel pulsed beams focused by a dispersive aperture lens are studied. It is shown that the spectral switches take place at the geometrical focal plane,and the dispersion results in a shift of spectral switches towards the z-axis. The dispersion of the first order leads to a decrease of the-peak intensity, to a noticeable shift and broadening of the pulse form,whereas the dispersion of the second and higher orders plays a relatively minor role. The beam order n and spatial parameter α additionally affect the transversal intensity distribution.
