Experimental study demonstrates high-responsivity multichannel optical reception using an InP-InGaAs photodetector array, highlighting viability for free-space optical radio systems.
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).
No takes yet. Share an insight, caveat, or question.
YAN et al. (2025) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: