Products
Hardware for light, memory and connection.
Three room-temperature technologies addressing the physical source, storage and wavelength interfaces required by emerging quantum systems.
Entangled photon source
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Quantum memory
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Frequency converter
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PPS-DG · Entangled photon sourceEntangled photon source
Narrow-band photon pairs, ready for fibre.
The AQLS source produces narrow-band entangled photon pairs at customisable wavelengths, including both degenerate and non-degenerate combinations. It is compatible with the AQLS quantum memory.
Cavity-enhanced spontaneous parametric down-conversion in monolithic ppKTP resonators combines high performance with robust, room-temperature operation.
- Customisable wavelength
- 100 MHz photon bandwidth
- More than 100k pairs per second
- Tuning range above 10 GHz
- Heralding efficiency up to 75%
- Room-temperature operation
- PM fibre coupling
- Time-bin or polarisation entanglement
Room-temperature quantum memoryQuantum memory
Storing quantum states of light on demand.
The AQLS memory platform uses hot caesium vapour to store single photons, preserve their quantum state and retrieve them on demand. It is designed around the requirements of quantum-repeater experiments without cryogenic cooling infrastructure. It is compatible with AQLS’s narrow-band entangled photon source.
The rack-mounted system was developed by the Integrated Quantum Sensors group at HU Berlin, where the AQLS memory platform was integrated.
Image adapted from Fig. 1 in M. Jutisz, A. Erl, J. Wolters, M. Gündoğan and M. Krutzik, “Stand-alone mobile quantum memory system,”Physical Review Applied 23, 024045 (2025),DOI: 10.1103/PhysRevApplied.23.024045,CC BY 4.0. Image isolated and background modified by AQLS.
- Hot caesium atomic vapour
- No cooling infrastructure required
- Lasers and electronics in a 19-inch rack
- Mobile system architecture
Quantum frequency converterQuantum frequency converter
Connecting photons across different wavelengths.
The best quantum emitters and quantum processors are often found at different wavelengths in the visible range. The AQLS quantum frequency converter is designed to translate single photons from visible or near-infrared light to telecom wavelengths while preserving quantum coherence. This allows long-range transmission of single photons from defect centres in diamond or 2D materials and can connect different quantum-computing platforms. It can be configured to interface AQLS photon sources with quantum memories and telecom-wavelength systems.
- Single-step conversion using ppKTP
- Robust monolithic crystal cavity
- Enhanced continuous-wave pump
- More than 75% internal conversion efficiency
- Low noise floor
- Room-temperature operation
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Which interface does your system need?
Tell us about your wavelength, bandwidth and integration requirements. We develop configurations around the systems they need to connect.