  The frequency of the Calcium ^3P_1--^1S_0 intercombination line at 657 nm is
phase-coherently measured in terms of the output of a primary cesium frequency
standard using an optical frequency comb generator comprising a sub-10 fs
Kerr-lens mode-locked Ti:Sapphire laser and an external microstructure fiber
for self-phase-modulation. The measured frequency of \nu_Ca = 455 986 240 494
276 Hz agrees within its relative uncertainty of 4 10^-13 with the values
previously measured with a conceptually different harmonic frequency chain and
with the value recommended for the realization of the SI unit of length.
