Tenders Are Invited For Quantum Pulse Gating Demonstratorfor Single Photon Based Optical Communication During Daylight (Artes 4.0 Sl Spl 3H.001) - Expro Plus

Tenders are invited for Quantum Pulse Gating Demonstratorfor Single Photon Based Optical Communication during Daylight (Artes 4.0 Sl Spl 3h.001) - Expro plus The objective of this activity is to design, build and validate a Quantum Pulse Gating breadboard optimising daytime optical communication, facilitating the integration of non-cryogenic silicon baseddetectors and eliminating the need for complex cryogenic systems.Targeted Improvements:- Up to 3 orders of magnitude improvement in background noise rejection compared to current solutions.- Reduction of power, volume and mass by a factor of 10, through integration of non-cryogenic detectors.Description:Single photonoptical wireless communication systems needed for applications including Quantum Key Distribution (QKD) and High Photon Efficiency (HPE) links are limited in performancesubstantially by the effects of background noise.State-of-the-art cryogenic Superconducting Nanowire Single Photon Detectors (SNSPDs) lead to bulky and heavy systems that due to narrowband spectral filtering of the received signal, do notallow the extraction, in a lossless manner, of the single temporal mode from the remaining background noise and hinder the attainment of high-purity heralded quantum states.Other solutions do exist, InGaAs Single Photon Avalanche Diodes (SPADs) suffer from poor performance, or silicon-based Geiger mode detectors with a quantum efficiency of > 70% - operatein proximity to the visible part of the spectrum, but do not currently provide an equivalent solution to the SNSPDs.A possible solution is a Quantum Pulse Gating (QPG) system, which filters only the signal temporal mode from the input beam, whilst leaving the remaining multimode background noise at theinput frequency of the unused idler beam.QPG systems are based on sum-frequency generation techniques within a non-linear medium utilising a pulsed laser which leads to very high-efficiency (>80%) coupling for ground laserreceivers and facilitates efficient operation even during daytime conditions.Several challenges such as the use of broadband communication pulses, and design of the non-linear medium as well as signal synchronisation of the onboard transmitter and the ground receiverneed to be addressed.Read more Tender Link : https://esastar-publication-ext.sso.esa.int/ESATenderActions/filter/open

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