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Broad area travelling wave GaAlAs SQW optical amplifiers have been fabricated and characterised. Using a 600 μm wide and a 1000 μm long double pass amplifier, 12 W of peak pulsed output power was achieved with a 0.08° wide diffraction limited far-field lobe. Small signal gain of 31 dB was measured in a 400 μm wide active area device.
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Goldberg et al. (1991) studied this question.
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