The axial intensity of nonparaxial Gaussian beams diffracted by a small aperture
-
1.
Department of Physics, Qiongzhou University, Wuzhishan 572200, China;
-
2.
Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China
-
Corresponding author:
LÜ Bai-da, badalu@scu.edu.cn
-
Received Date:
2004-12-20
Accepted Date:
2005-02-24
-
Abstract
Based on the Rayleigh diffraction integral and without use of the usual approximation,R>λ(λ is wavelength),an exact analytical expression for the axial intensity of nonparaxial Gaussian beams diffracted by a small circular aperture is derived.Then the conventional intensity definition and accurate intensity expression is comparatively studied.It is found that the difference between the two definitions depends on the f-parameter,truncation parameter δ and propagation distance z.
-
-
References
|
[1]
|
LAABS H.Propagation of Hermite-Gaussian-beams beyond the paraxial approximation[J].Opt Commun,1998,147:1～4. |
|
[2]
|
NEMOTO S.Nonparaxial Gaussian beams[J].Appl Opt,1990,29(13):1940～1946. |
|
[3]
|
DUAN K L,LÜ B D.Non-paraxial Hermite-Gaussian-beams and their higher-order corrections[J].Laser Technology,2003,27(2):155～157(in Chinese). |
|
[4]
|
CAO Q,DENG X M,GUO H.Accurate expression of light intensity at transverse plane[J].Acta Optica Sinica,1996,16(7):897～902(in Chinese). |
|
[5]
|
CAO Q,DENG X M.Power carried by scalar light beams[J].Opt Commun,1998,151:212～216. |
|
[6]
|
PORRAS M A.Finiteness and propagation law of the power density second-order moment for diffracted scalar light beam[J].Optik,1999,110(9):417～420. |
|
[7]
|
MANDEL L,WOLF E.Optical coherence and quantum optics[M].Cambridge:Cambridge University Press,1995.126. |
|
[8]
|
MANDEL L,WOLF E.Optical coherence and quantum optics[M].Cambridge:Cambridge University Press,1995.185. |
-
-
Proportional views
-
Map
DownLoad: