Abstract
We describe a 1.5-μm semiconductor optical amplifier which can have 24-dB small-signal gain with a 3-dB saturation output power of 90 mW. The key feature of this device, which allows the combination of large gain with high saturation output power, is a large stripe width. In general, the saturation intensity increases when the gain coefficient of an amplifier decreases. To achieve large saturation intensity, a small gain coefficient is therefore required.
© 1992 Optical Society of America
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