Optical parametric amplification in dual-pumped tellurite hybrid microstructured optical fiber with engineered chromatic dispersion

Abstract

We numerically demonstrated broad and flattened gain spectra of optical parametric amplification employing highly nonlinear tellurite optical fiber and dual-pump configuration. The chromatic dispersion profile of the tellurite hybrid microstructured optical fiber was engineered to be near-zero and flattened, having four zero-dispersion wavelengths at 1421, 1643, 1928 and 2169 nm. The effect of pump wavelength was investigated when the two pump powers were kept at 1 W, the fiber length was 25 cm and the fiber nonlinearity was as high as 6642 W-1km-1. It is shown that OPA gain bandwidth with gain ripples could be as broad as 1393 nm at 10-dB signal gain. When the central pump wavelength approached the third zero- dispersion wavelength and the pump powers were 1.25 W, an ultra-flat (±0.01-dB gain fluctuation) and broad gain bandwidth (658 nm at 30-dB signal gain) could be achieved.