The performance of semiconductor laser amplifiers as linear repeaters in intensity modulated systems has been studied by many authors.1,2 We present the experimental results of a 100 + 100km 1.5-μm optical transmission system using a low-reflectivity laser amplifier as a repeater; It is believed this is the first amplifier experiment at 1.5 μm using a fiber channel. Possible system impairments such as polarization-dependent gain, backscatter, and amplifier spontaneous noise were assessed.

© 1986 Optical Society of America

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