LBNL, Berkeley, California
We present progress on developments of a timing system with femtosecond sensitivity. Our approach consists of an interferometrically stabilized link that is used to transmit timing information between a master clock and a remote device, typically either an RF system or a laser. Our results show that the optical link can be stabilized to less than 1 fs/h drift and subfemtosecond fast jitter. Transmission of RF signnals can be achieved as an amplitude modulation of the optical carrier. Early results show sub 50 fs jitter introduced on the RF signal, presently limited by measurement accuracy.
