We have performed a multi-arm Er:fiber-based frequency comb comparison. The optical beat frequencies are simultaneously realized over 90 THz (from 192 to 282 THz) showing an integrated phase noise below 55 mrad (1 Hz-1 MHz) and an overlapping ADEV of 5×10−17 at 1 s, averaging below 1×10−18 at 100 s (PI-mode).

© 2017 Optical Society of America

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