Abstract: we propose a 60GHz wireless access network scheme with centralized LO service delivered to mobile terminals and base stations from the central office. Bidirectional transmission based on the scheme has been experimentally demonstrated. OCIS codes: (060.0060) Fiber optics and optical communications; (060.2330) Fiber optics communications Introduction Due to the increasing demand for in-door, high speed wireless access networks for next generation, millimeter-wave (MM-W) wireless-over-fiber (WoF) technology has been considered as a very promising solution. However, with the increasing of the carrier frequency up to 60GHz, the diameter of the coverage area of each base station (BS) is limited within tens of meters. As a consequence, numerous electrical local oscillator (LO) devices of high frequency are required in each BS and mobile terminal (MT), incurring high system complexity and cost. Hence, cost-effective microwave photonic techniques for frequency up-conversion have been developed for system integration In this paper, we propose a new CO-BS-MT architecture to construct a bidirectional 60GHz WoF system, while providing both remote BS and MT with LO service of high-quality from the CO. For the downlink transmission, frequency up-conversion via optical beating and self-heterodyne detection techniques have been utilized to transmit and receive MM-W signals, while eliminating the use of electrical LO generators in both BS and MT. For the uplink transmission, the high-frequency LO, which is required for data up-conversion in MT and the MM-W signal downconversion in BS, is provided by the centralized LO service distributed from CO, instead of relying on electrical LO generators in MT and BS. The stability and operational parameters of LO are pre-determined and controlled in CO. A proof-of-concept experiment is carried out to demonstrate the feasibility of the proposed scheme
