Fast-light-assisted four-wave mixing in the photonic bandgap

In this Letter, the enhanced four-wave mixing (FWM) in the photonic bandgap of fiber Bragg grating (FBG) has been achieved with an extra phase introduced by fast-light effect in the bandgap. The experiment for phase-matched FWM generation in the bandgap in a special-designed FBG was carried out, as well as simulations. The enhanced energy conversion with such a FWM in the bandgap has been demonstrated but the transmissivity has not. The experimental results show agreement with the simulations.