A consortium consisting of Sparrow Quantum, Single Quantum, Refined Laser Systems, and the Ruhr-Universität Bochum has launched the Quantum Transceiver Based on Deterministic Single-Photon Sources (QTRAIN) initiative. Backed by the EUREKA R&D network, the project aims to develop the first commercially available single-photon quantum transceiver by January 2027.
The QTRAIN model is designed for high-efficiency quantum communications by improving on previous technology through integration. The system will house the single-photon source and the single-photon detectors within the same cryostat at the O-band telecom wavelength. The consortium partners bring specialized components: Ruhr-Universität Bochum supplies quantum dots at 1310 mm, Sparrow Quantum provides deterministic single-photon sources, and Single Quantum manufactures the detectors and cryostat.
The development is targeting specific, quantifiable gains to reduce barriers to adoption, including an expected 50% reduction in physical footprint and 60% lower energy consumption. The launch represents the first attempt to scale this technology to a level appropriate for the commercial sphere, with the resulting transceiver intended to be the most advanced photon detection unit commercially available for secure quantum communications.
Read the full announcement here.
December 1, 2025
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