Back-seeding of higher order gain processes in picosecond supercontinuum generation.
In photonic crystal fibers with closely spaced zero dispersion wavelengths it is possible to have two pairs of four-wave mixing (FWM) gain peaks. Here, we demonstrate both numerically and experimentally how the outer four-wave mixing gain peaks can be used to produce a strong amplification peak in a picosecond supercontinuum. The method involves feeding back part of the output light of a SC source and time matching it with the pump light. In this way it is possible to produce a gain of over 20 dB near the FWM gain wavelengths.
Moselund
Peter M
PM
Koheras A/S, Blokken 84, DK-3460, Birkerød, Denmark. Peter.Moselund@fotonik.dtu.dk
Frosz
Michael H
MH
Thomsen
Carsten L
CL
Bang
Ole
O
D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008027:Light; D008962:Models, Theoretical; D012542:Scattering, Radiation