抄録
Application of semiconductor optical amplifiers to wavelength division multiplexing systems in a 1.3-μm wavelength band have been studied. Measured characteristics of gain and noise figure of the SOA having small dependency on polarization states confirm that it is applicable to the repeater amplifier and the pre-amplifier. When it is used as the pre-amplifier of a non-repeated two-channel 10-Gb/s system an allowable line loss of 32dB is attained with the aid of the other SOA used for the post-amplifier. Measured bit error rate of a system with one repeater amplifier is well simulated from the individual characteristics of the SOA and the optical receiver. Using the similar technique, it is predicted that more than ten amplifiers can be applied in the system with cascaded repeater amplifiers on the assumption that the polarization dependency of the gain is ignored.
