| Authors: | Y. Yan, M. Yang, S. Han, C. Kang, H. Salmanian, Z. Wu, Y. Gu, M. Zhao, G. Morthier | | Title: | Multi-channel RF-optical receiver enabled by a high performance p-i-n InP-InGaAs based photodetector array | | Format: | International Journal | | Publication date: | Accepted for publication. Not yet published | | Journal/Conference/Book: | Optics Letters
| | Editor/Publisher: | Optica, | | Location: | United States | | Citations: | Look up on Google Scholar
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Abstract
We propose an integrated back-illuminated InP/InGaAs
p-i-n photodetector array (PDA) with high responsivity
and external quantum efficiency. The photodetector
array was characterized and packaged for small-signal
response and transmission experiments. At the bias
voltage of -5V, the dark current is below 0.35nA and the
average optical responsivity reaches up to 1 A/W for
each ∅ = 50μm element at 1550nm. The external quantum
efficiency is as high as 81% at -5V at 1550nm. Under
the photocurrent of 63μA at -5V bias, the proposed
InP/InGaAs PDA exhibits an average 3dB bandwidth
of 3.6GHz. We finally demonstrate a BER below 10−12
at a 2.25Gbit/s data rate. The compact size and large
photosensitive area of the PDA will enable new applications
for Radio on Free Space Optical communications
(RoFSO). |
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