100 dB optical path loss transmission system experiment employing two linear optoelectronic repeaters

Linear optoelectronic amplification is investigated as an economic option for the provision of sufficient optical gain for fibre transmission systems of several hundred km lengths. Experimental results are presented demonstrating a system span capability in excess of 100 dB at 420 Mbit/s and 1.55 mu m wavelength with two intermediate linear repeaters. Extensions of the technique to higher line-rates and larger numbers of repeaters are discussed.