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A bidirectional transmission scheme is proposed that is suitable for an optical transmission system with Er3+-doped fibre amplifiers using pump intensity modulation of a 1.48 μm pump laser diode. The practical feasibility of this proposal is confirmed by a system analysis and a transmission experiment. No penalty was observed for an amplified 2.4 Gbit/s signal at 1.536 μ with a 5 MHz subcarrier from a 1.48 μm pump laser diode.
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Suyama et al. (1991) studied this question.
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