An all-fibred, telecom technology compatible, room temperature, single-photon source

Abstract

Single photon sources are essential building blocks for fundamental quantum optics but also for quantum information networks. Their widespread is currently hindered by unpractical features, such as operation at cryogenic temperature and emission wavelength lying outside telecom windows. Taking advantage of telecom technology and point defects in GaN crystals, we present, for the first time, the development of a fully-fibred source of single photons operating at room temperature, emitting photons in the telecom O-band and fulfilling the standards of telecom photonics. We characterise an emitter producting single photons at the wavelength of 1292\,nm, a spectral broadening compatible with CWDM channels of 13\,nm, and a brightness of 25 kcps per mW of pump power. The source shows a signal-to-noise ratio of 16.5 and an autocorrelation degree (purity) of 0,059 at room temperature, showing high potential for being integrated transportable quantum cryptography devices.

References in corpus (19)

• Quantum Cryptography
• The Quantum Internet
• Quantum cryptography: Public key distribution and coin tossing
• The Security of Practical Quantum Key Distribution
• Quantum-enhanced measurements: beating the standard quantum limit
• Quantum Simulation
• Near optimal single photon sources in the solid state
• Tunable and high purity room-temperature single photon emission from atomic defects in hexagonal boron nitride
• Qubit teleportation between non-neighboring nodes in a quantum network
• Room temperature stable single-photon source
• Quantum Communication Using Semiconductor Quantum Dots
• Teleportation Systems Towards a Quantum Internet
• A Quantum Key Distribution Testbed using a Plug&Play Telecom-wavelength Single-Photon Source
• Room-temperature single-photon source with near-millisecond built-in memory
• Probing the Optical Dynamics of Quantum Emitters in Hexagonal Boron Nitride
• Photon emission correlation spectroscopy as an analytical tool for quantum defects
• Certified randomness in tight space
• Metropolitan quantum key distribution using a GaN-based room-temperature telecommunication single-photon source
• Polarization-encoded quantum key distribution with a room-temperature telecom single-photon emitter