Fiber frequency dissemination with resolution in the 10-18 range

Abstract

The paper presents an ultra-stable fibre optic link which allows to transfer frequency reference signal between two research laboratories. The link is composed of two 43 km twin optical fibres of the Paris telecommunications network that rely the LPL to LNE-SYRTE. The stability of the transferred signal is degraded by mechanical vibration and temperature variation along the fibre. To correct these effects a compensation system has been developed who acts directly on the fibre length, with a variable optical delay line