Abstract

Silica nanowires with high nonlinearities are attractive for a variety of applications such as continuum generation and new light sources. In particular, a growing interest was shown in using these nanowires for second harmonic generation (SHG) and third harmonic generation (THG) [1-3]. However, conversion efficiencies remain low, and new methods to improve this conversion are still required. In this work, we experimentally demonstrate enhanced surface SHG using a nonlinear microfiber loop resonator, in which the recirculation of the resonant pump wavelengths enhances the second harmonic conversion and reduces the required pump power.

© 2013 IEEE