Diffraction properties of opaque disks outside and inside a laser cavity

Renaud de Saint Denis (1) , Nicolas Passilly (2) , Michael Fromager (1) , Emmanuel Cagniot (1) , Kamel Aït Ameur (1)

1 CIMAP - UMR 6252 - Centre de recherche sur les Ions, les MAtériaux et la Photonique
2 Department of Physics and Mathematics

Diffraction of symmetrical Laguerre–Gauss TEMp0 beams incident on an opaque disk known as a stop is considered. The near- and far-field patterns are studied. Thanks to zero-field occluding, conversion from TEM10 beam to dark hollow beam can be achieved with better efficiency than from a TEM00 beam. It is shown that the fundamental mode of a laser cavity including a diaphragm and a stop can be TEM00- or TEM10-like in shape depending on their size. This result is interpreted from the new divergence hierarchy, which characterises the diffracted TEMp0 beams emerging from the stop.

Domaines: Optique [physics.optics]

Renaud de Saint Denis, Nicolas Passilly, Michael Fromager, Emmanuel Cagniot, Kamel Aït Ameur. Diffraction properties of opaque disks outside and inside a laser cavity. Optics Communications, 2008, 281, pp.444-451. ⟨cea-00324523⟩