A Proposal for Enhanced Parametric Amplification in Periodic Superstructure Fiber

We designed a multidefect nonlinear superstructure fiber (SF) to serve as the gain medium of optical parametric amplification. In both theoretical derivation and simulation results, the signal amplification proved to achieve enhancement at certain frequencies where the local field intensities were increased or the slow group velocities of the modes were greatly slowed down on the band edges to offset the negative effect raised by large wave vector mismatching.