Transmission of an optical frequency standard utilizing an 85 km fiber optic link

An ultra-stable fiber optic frequency link used to transfer a reference frequency signal through a standard telecommunication optical fiber from a laboratory at some 20-km distance is presented. This optical fiber is 42.5 km long and propagates a carrier at 1.55 /spl mu/m from SYRTE to LPL. The carrier is modulated by a 100 MHz signal, itself referenced to a H-maser at SYRTE.