The paper briefly describes the present status of laboratory research on Prdoped fluoride glass fiber amplifier used for optical fiber communications at 1.3 pm wavelength. Based on the principles of optical fiber amplifier

the paper explains how to select the doped ions and glass composition of fiber core for 1.3 μm amplifio tion. Then

the performance measurement results obtained in the laboratories on small signal amplifier

power amplifier

and pump source are described. It is predicted that such 1.3 μm amplifier would be successfully made in the near future to serve on the optical fiber lines of digital communication network as well as cable television network.