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A 2 × 2 array of individually driven MQW modulators has been fabricated. Because of the large electroabsorption effect in MQWs, good on/off ratios can be achieved in a single pass through a set of 50 MQWs. Each device has an on/off ratio of approximately 1.45 : 1, and the modulator displays rise and fall times of roughly 400 ps.
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Wood et al. (1987) studied this question.
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