Abstract

The authors report on high-speed, very large-area, visible light photoreceivers suitable for large-core 1 mm polymer optical fibers (POF). The receivers are based on metal-semiconductor-metal photodetectors (MSM-PD) grown on gallium-arsenide (GaAs) substrate. Three active diameters of ∅1000 μm, ∅700 μm and ∅400 μm were fabricated in order to meet the requirements of the following three specific POF applications.The first photoreceiver was designed to characterize the bandwidth of 1 mm POF. For that reason the receiver has an active diameter of ∅1000 μm to detect all modes at the end of the fiber. With this receiver the frequency response of 1 mm graded-index (GI-) POF was measured up to 12 GHz.The ∅700 μm photoreceiver was designed for high-speed data transmission. Due to the large active area there is no need for an optical concentrator and the 1 mm POF can simply be butt-coupled to the receiver. With this receiver a novel real-time transmission of 10 Gb/s over up to 20 m GI-POF using simple non return to zero (NRZ) modulation is presented.For data rates beyond 10 Gb/s the ∅400 μm photoreceiver with a 3-dB bandwidth of 11 GHz was designed. A record bit rate of 32 Gb/s was transmitted with this receiver over large-core 1 mm polymethylmethacrylate (PMMA) GI-POF.These achieved results are by far the best reported values for large-area visible light photoreceivers.

© 2013 IEEE

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