  We report on the conception, fabrication and characterization of a new
concept of optical fiber enabling a precise control of the ratio between the
2nd and 4th-order of chromatic dispersion (respectively \b{eta}2 and \b{eta}4)
at 1.55 micro-meter which is at the heart of the Four-Wave-Mixing (FWM)
generation. For conventional highly nonlinear fiber the sensitivity of this
ratio to fiber geometry fluctuations is very critical, making the fabrication
process challenging. The new design fiber reconciles the accurate control of
chromatic dispersion properties and fabrication by standard stack and draw
method, allowing a robust and reliable method against detrimental fluctuations
parameters during the fabrication process. Experimental frequency conversion
with FWM in the new design fiber is demonstrated.
