Abstract
The authors propose a novel edge-illuminated refraction-facet photodiode (RFPD), where the incident light parallel to the upside surface is refracted at an angled facet and absorbed in a thin absorption layer. Fabricated RFPDs with an absorption layer thickness of 1.5 /spl mu/m show a responsivity as high as 0.96 A/W even at a bias voltage of 0.5 V for a flat-ended singlemode fibre.
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