Receivers for optical communications: A comparison of avalanche photodiodes with PIN-FET hybrids |
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Authors: | D R Smith R C Hooper I Garrett |
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Institution: | (1) Post Office Research Centre, Martlesham Heath, Ipswich, UK |
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Abstract: | The effects of photodiode bulk leakage current and amplifier noise on receiver sensitivity are analysed using a model described previously 4]. The sensitivity of a receiver using a PIN photodiode can be greatly improved by employing a high-performance microwave FET in the input stage, to the point where its remaining technical disadvantage in comparison with a silicon APD receiver at 800–900 nm may be offset by economic and operational attractions. In systems operating at the optimum transmission wavelength beyond 1.1 m, the PIN-FET hybrid receiver may offer better technical performance than an APD receiver. |
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