In astronomy and related fields there is a pressing need to efficiently inject light, transmitted
through the atmosphere, into a single-mode fibre. However this is extremely difficult due to …

The coupling of large telescopes to astronomical instruments has historically been
challenging due to the tension between instrument throughput and stability. Light from the …

The National Aeronautics and Space Administration (NASA) Glenn Research Center (GRC)
has developed a photon-counting optical ground receiver for pulse-position modulated …

The National Aeronautics and Space Administration (NASA) is continuously working in
furthering its space and aero communications capabilities required for the successful …

The NASA Glenn Research Center's development of a high-photon efficiency real-time
optical communications ground receiver has added superconducting nanowire single …

In this paper, we examine the problem of coupling partially coherent light from a telescope
into an optical fiber within the framework of phase space optics using Wigner distributions …

For high photon-efficiency deep space or low power optical communications links, such as
the Orion Artemis-2 Optical Communications System (O2O) project, the received optical …

The Australian National University (ANU) Optical Communications Ground Station (OCGS)
is currently under development at Mt. Stromlo Observatory in Canberra, Australia. The …

In this paper we present a comparative study of the losses associated with fiber-coupled
single-photon detectors in two different configurations, each with the goal of receiving a …

We present a scalable design for a photon-counting ground receiver based on
superconducting nanowire single photon detectors (SNSPDs) and field programmable gate …