Abstract

Basic studies and trial experiments have been reported on fiber-optic digital radio links between base stations and mobile switching offices or between base stations and canister antennas.^1,2 However, their values of carrier to noise ratios (CNRs) and system dynamic ranges are not sufficient for practical purposes. This paper report 42-kbit/s QPSK modulated data with 1.5-GHz subcarriers are successfully transmitted over 30-km single-mode fiber using a 1.3-μm DFB laser and a highly sensitive PIN photodiode receiver.

© 1992 Optical Society of America