Abstract
The phase correction of a vortex laser beam is undertaken in the closed-loop adaptive system including a Hartmann-Shack wavefront sensor with singular reconstruction technique and a bimorph piezoceramic mirror. After correction the vortex doughnutlike beam is focused into a beam with bright axial spot that considerably increases the Střehl ratio and optical system resolution. Since the phase break cannot be exactly reproduced on the flexible mirror surface, off-axis vortices appear in the far field at the beam periphery.
Original language | English |
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Pages (from-to) | 2264-2266 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 34 |
Issue number | 15 |
DOIs | |
Publication status | Published - 1 Aug 2009 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics