Abstract
We describe an optical beam converter for an efficient transformation of Gaussian femtosecond laser beams to single- or double-charge vortex beams. The device achieves a conversion efficiency of 75% for single- and 50% for double-charge vortex beams and can operate with high-energy broad bandwidth pulses. We also show that the topological charge of a femtosecond vortex beam can be determined by analyzing its intensity distribution in the focal area of a cylindrical lens.
| Original language | English |
|---|---|
| Pages (from-to) | 2660-2662 |
| Number of pages | 3 |
| Journal | Optics Letters |
| Volume | 35 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - 1 Aug 2010 |