Open AccessSecond-harmonic generation of asymmetric Bessel-Gaussian beams carrying orbital angular momentum
Author(s) -
Kun Dai,
Wenzhe Li,
Kaitlyn Morgan,
Yuan Li,
J. Keith Miller,
Richard J. Watkins,
Eric Johnson
Publication year - 2020
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.381679
Subject(s) - angular momentum , physics , optics , bessel function , charge (physics) , orbital angular momentum of light , high harmonic generation , second harmonic generation , gaussian , total angular momentum quantum number , laser , quantum mechanics
Nonlinear processes of laser beams carrying orbital angular momentum (OAM) offer a means to generate new wavelengths and to manipulate OAM charge numbers. We demonstrate the second-harmonic generation (SHG) of asymmetric Bessel-Gaussian (BG) beams carrying OAM of both integer and fractional charge numbers. Experimental results show a good one-to-one correspondence of the charge numbers and compliance with the OAM conservation law. The SHG conversion process and efficiency with different combined charge numbers are also discussed.