Broadband mid-infrared fiber optical parametric oscillator based on a three-hole suspended-core chalcogenide fiber

摘要

A mid-infrared fiber optical parametric oscillator is proposed and designed based on a three-hole As2S5 suspended-core fiber (SCF). The eigenmodes of the SCF are depicted and the pump condition for single-mode operation is analyzed. The zero-dispersion wavelength is shifted to 2 mu m by tuning the core diameter of the SCF. Using the degenerate four-wave mixing coupled-wave equations, a tuning range of the idler wavelength from 2 to 5 mu m and a maximum conversion efficiency of 19% are numerically predicted in a 0.1-m-long SCF pumped by a 2.7 W thulium-doped fiber laser. (C) 2016 Optical Society of America