Abstract
Second-harmonic generation (SHG) in double-anode thermally poled fibers is numerically investigated. The poling process is investigated based on a two-dimensional charge dynamics model. We show that SHG efficiencies of , , and modes are affected by distribution in the fiber core, which can be deliberately designed by varying poling parameters. Efficient generation of the mode at second-harmonic (SH) could be achieved in symmetrically double-anode poled fiber, which provides an alternative method to obtain radial vector beams in compact all-fiber-based devices. SHG of and (or ) modes could also be available at different wavelengths in a single asymmetrical double-anode poled fiber, which can be potentially applied in two-wavelength or ultrabroadband SHG.
© 2017 Optical Society of America
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