a Optics and Photonics Research Center at Unicamp, University of Campinas, 13083-970 Campinas, SP, Brazil b Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC, 09210-170 Santo André, SP, Brazil
Abstract:
We present an optimized technique to generate frequency combs by four-wave mixing in highly nonlinear low-dispersion fibers. Three-pumps with unequally spaced frequencies (separation of 100 and 200 GHz) were used. The pumps were located relatively close to the zero-dispersion wavelength of the fiber. Using this three-pump technique we obtained a total of 275 FWM products experimentally, with a 100 GHz spacing and a spanning of over 220 nm.