Second-harmonic generation has been obtained by the use of Laguerre-Gaussian beams in a variety of mode orders. Each mode becomes doubled in frequency and transformed to a higher order. We show this to be a consequence of the phase-matching conditions. The experiment is consistent with the interpretation that the orbital angular momentum of the Laguerre-Gaussian mode is directly proportional to the azimuthal mode index [Formula Presented].
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - 1996|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics