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Nonparaxial analysis of far-field properties of Gaussian beams diffracted at a circular aperture
- Source :
- Optics Express. 11:1474
- Publication Year :
- 2003
- Publisher :
- The Optical Society, 2003.
-
Abstract
- On the basis of angular spectrum representation and the stationary-phase method, a far-field expression for nonparaxial Gaussian beams diffracted at a circular aperture is derived, which permits us to study the far-field nonparaxial properties of apertured Gaussian beams both analytically and numerically. It is shown that for the apertured case, the f -parameter and the truncation parameter affect the beam's far-field properties. The f -parameter plays the more important role in determining the beam nonparaxiality than does the truncation parameter, whereas the truncation parameter additionally influences the beam diffraction. A comparison with the paraxial case is made. For the unapertured case our results reduce to the previous ones.
Details
- ISSN :
- 10944087
- Volume :
- 11
- Database :
- OpenAIRE
- Journal :
- Optics Express
- Accession number :
- edsair.doi.dedup.....5dba714ee30d883835afea56db14202a