SINGLE-PHOTON DEMULTIPLEXING SYSTEMS
Single-photon demultiplexing refers to the process of separating and extracting individual photon signals from a composite stream of photons. This technique is crucial in quantum communication and quantum information processing systems, where the ability to manipulate and detect individual photons is essential.
It enables the extraction of quantum states carried by photons and facilitates various protocols such as quantum key distribution (QKD) or quantum teleportation. QUBIG offers low optical loss spatial demultiplexing systems with single-photon repetitions up to 160MHz and up to 16 channels.
Quantum technologies take advantage of quantum mechanical effects to solve problems limited by current classical alternatives. Single photons are promising candidates for a broad range of applications in quantum information, quantum metrology, and, perhaps one of the most promising technologies, the realization of a quantum computer. The objective of QUBIG is to provide complete systems for single photon manipulation that brings photonic quantum technologies to the next level. To this end, QUBIG has developed in recent years electro-optic devices and tailored electronic drivers specifically for the manipulation of the physical properties of individual photons.
SINGLE PHOTON MANIPULATION
QUBIG is a world-leading expert in the field of light modulators and has dedicated significant effort to the development of high-performance electro-optic devices and matching driver electronics for precision manipulation of the Phase, Amplitude, and Polarization of individual photons with unprecedented accuracy. Our unique high-voltage technology and active mitigation of piezo-electric resonances allow us to reach rise times down to 5ns and up to 31-point accuracy for phase, polarization, and amplitude while keeping a very high transmission.
Quantum computing with light requires multi-photon interference and relies on indistinguishable single photons arriving simultaneously at the input ports of a photonic circuit. The isochronal photons distributed over N channels can be created by multiplexing a periodic train of photons from a single channel into multiple outputs.
QUBIG provides full systems for spatial demultiplexing of single photons based on our unique resonant electro-optic modulation technology. Our high-performance devices are compatible with single photon sources with repetition rates up to 160 MHz for demultiplexing into 2,4,8, and 16 channels [1,2].
KEY FEATURES: DMX-SERIES
- High transmission: >99.5%
- High extinction ratio: >300:1
- Laser Pulse Rep.-Rates: max. 160MHz
- Demultiplexing in up to 16-CH
- Coupling efficiency: >90%@ 1550nm
 XANADU Quantum computational advantage with a programmable photonic processor, Nature 606, 75–81 (2022)
 MPQ: Efficient generation of entangled multiphoton graph states from a single atom. Nature 608, 677–681 (2022)
 CNRS: Interfacing scalable photonic platforms: solid-state based multi-photon interference in a reconfigurable glass chip, Optica Vol. 6, Issue 12