Abstract

The optical frequency sweep of an actively linearized, ultrabroadband, chirped laser source is characterized through optical heterodyne detection against a fiber-laser frequency comb. Frequency sweeps were measured over approximately 5THz bandwidths from 1530nm to 1570nm. The dominant deviation from linearity resulted from the nonzero dispersion of the fiber delay used as a reference for the sweep linearization. Removing the low-order dispersion effects, the residual sweep nonlinearity was less than 60kHzrms, corresponding to a constant chirp with less than 15ppb deviation across the 5THz sweep.

© 2011 Optical Society of America

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