We report the coherent spectral broadening of the output of a mode-locked VECSEL emitting 455 fs pulses at 1007 nm in the normaldispersion regime. Subsequent compression of the fiber outputs using a transmission grating compressor produced 1.56 GHz trains of 150 fs pulses at 270 mW average power or 220 fs pulses at 520 mW average power. The system approaches the performance needed for a pump for coherent supercontinuum generation.
Quarterman, A. H., Hooper, L. E., Mosley, P. J., & Wilcox, K. G. (2014). Gigahertz pulse source by compression of modelocked VECSEL pulses coherently broadened in the normal dispersion regime. Optics Express, 22(10), 12096-12101. https://doi.org/10.1364/OE.22.012096