Shaped Supercontinuum for Precision Frequency Transfer

SummaryWe optimize a supercontinuum spectrum for high power at three clock wavelengths, a C-band reference, and an f-2f pair by phase shaping with a chirped fiber Bragg grating. We generate about 100 nW per comb line, with fractional frequency instability of about 10
⁻¹⁷
at 1 s, sufficient for frequency comparisons of most optical clocks.