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InGaAs-InP modified charge compensated uni- traveling carrier photodiodes with both absorbing and nonabsorbing depleted region are demonstrated. The fiber-coupled external quantum efficiency was 60% (responsivity at 1550 nm = 0.75 A/W). A 40-mum-diameter photodiode achieved 14-GHz bandwidth and 25-dBm RF output power and a 20-mum-diameter photodiode exhibited 30-GHz bandwidth and 15.5-dBm RF output power. The saturation current-bandwidth products are 1820 mA ldr GHz and 1560 mA GHz for the 40-mum-diameter and 40-mum-diameter devices, respectively.
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Wang et al. (2007) studied this question.
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