TY - JOUR
T1 - Second-harmonic generation and the conservation of orbital angular momentum with high-order Laguerre-Gaussian modes
AU - Courtial, J.
AU - Dholakia, K.
AU - Allen, L.
AU - Padgett, M. J.
PY - 1997
Y1 - 1997
N2 - Laguerre-Gaussian modes of various order are frequency doubled. The azimuthal phase structure of the second-harmonic light is measured directly by interfering the beam with its mirror image. We show that the orbital angular momentum per photon is doubled, so conserving the orbital angular momentum in the light beam. The frequency-doubled output beam is shown to have a Gegenbauer-Gaussian amplitude distribution at the beam waist. The beam can be described as a summation of Laguerre-Gaussian modes that interfere so that it changes form with propagation, but the distribution at the beam waist is reproduced in the far field.
AB - Laguerre-Gaussian modes of various order are frequency doubled. The azimuthal phase structure of the second-harmonic light is measured directly by interfering the beam with its mirror image. We show that the orbital angular momentum per photon is doubled, so conserving the orbital angular momentum in the light beam. The frequency-doubled output beam is shown to have a Gegenbauer-Gaussian amplitude distribution at the beam waist. The beam can be described as a summation of Laguerre-Gaussian modes that interfere so that it changes form with propagation, but the distribution at the beam waist is reproduced in the far field.
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U2 - 10.1103/PhysRevA.56.4193
DO - 10.1103/PhysRevA.56.4193
M3 - Article
AN - SCOPUS:0001692993
SN - 1050-2947
VL - 56
SP - 4193
EP - 4196
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 5
ER -