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Furukawa Review No.19

Development of High-Power Optical Amplifier

Yoshio Tashiro, Satoshi Koyanagi, Keiichi Aiso, Kanji Tanaka, Shu Namiki


With the development of the D-WDM (Dense Wavelength Division-Multiplex) transmission technology together with its practical applications in recent years, optical amplifiers --in particular EDFA (Erbium-Doped Fiber Amplifier)-- used in these transmission systems are required to have ever higher performance. In this report, a high-power EDFA is presented which has achieved a high signal output of 1.5 W. The EDFA uses a set of high power pumping light sources in which the outputs of semiconductor laser diodes in the 1480-nm range are multiplexed over three wavelengths.

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