激光杂志
激光雜誌
격광잡지
LASER JOURNAL
2012年
3期
21-22
,共2页
余弦平方高斯光束%无光阑透镜%梯度力%光阱
餘絃平方高斯光束%無光闌透鏡%梯度力%光阱
여현평방고사광속%무광란투경%제도력%광정
cosine - squared Gaussian beams%thin lens without aperture%gradient force pattern%optical trap
利用Collins公式推导了余弦平方高斯光束（CSGB）通过无光阑透镜光学系统聚焦后的光强分布及梯度力表达式。通过数值模拟讨论了光束参数、光束入射距离及系统菲涅耳数的变化对梯度力分布及光阱的数量、位置及尺度的影响。结果表明，光束相关参数越大光阱的数量越多，光阱的位置随光束入射距离而改变，系统菲涅耳数增加光阱尺度减小，而位置不变。
利用Collins公式推導瞭餘絃平方高斯光束（CSGB）通過無光闌透鏡光學繫統聚焦後的光彊分佈及梯度力錶達式。通過數值模擬討論瞭光束參數、光束入射距離及繫統菲涅耳數的變化對梯度力分佈及光阱的數量、位置及呎度的影響。結果錶明，光束相關參數越大光阱的數量越多，光阱的位置隨光束入射距離而改變，繫統菲涅耳數增加光阱呎度減小，而位置不變。
이용Collins공식추도료여현평방고사광속（CSGB）통과무광란투경광학계통취초후적광강분포급제도력표체식。통과수치모의토론료광속삼수、광속입사거리급계통비열이수적변화대제도력분포급광정적수량、위치급척도적영향。결과표명，광속상관삼수월대광정적수량월다，광정적위치수광속입사거리이개변，계통비열이수증가광정척도감소，이위치불변。
The intensity distribution and gradient force pattern of cosine- squared Ganssian beams focused by a thin lens without aperture were derived based on the Collins formula. Through the numerical simulation, the influence of the beams parameter, relative incident separation and beams Fresnel number on the distribution of gradient force pattern and the numbers, position and size of optical traps were discussed. The results indicated that the bigger of the beams parameter the more of the optical traps, the positions of which change with beams relative incident separation,and the size decreased with the increase of Fresnel number of the system while the position is unchanged.
