Increasing the link-distance of free-space quantum coherent
communication with large area detectors
- URL: http://arxiv.org/abs/2011.03843v1
- Date: Sat, 7 Nov 2020 20:18:48 GMT
- Title: Increasing the link-distance of free-space quantum coherent
communication with large area detectors
- Authors: Rupesh Kumar, Igor Konieczniak, Gerald Bonner, Tim Spiller
- Abstract summary: We report a large area photo-diode based homodyne detector for free-space quantum coherent communication.
The detector's performance is studied in terms of detection bandwidth and electronic noise for shot-noise limited quantum signal detection.
- Score: 0.1529342790344802
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We report a large area photo-diode based homodyne detector for free-space
quantum coherent communication. The detector's performance is studied in terms
of detection bandwidth and electronic noise for shot-noise limited quantum
signal detection. Using large area photo-diodes increases signal collection
efficiency from turbulent atmospheric channels, in comparison with typical
fibre based free-space homodyne detectors. Under identical atmospheric
turbulence and receiver aperture conditions, our homodyne detector based on 1mm
diameter photo-diode experiences 0dB loss due to turbulence while a 10um fibre
based detector experiences 13.5dB of signal loss over a 700km free-space link,
at 90 degree elevation angle.
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