Periodically-poled silica fiber as a versatile quantum source

Li Qian; Alexander Greenwood

doi:10.1117/12.3028527

2 August 2024 Periodically-poled silica fiber as a versatile quantum source

Li Qian, Alexander Greenwood

Proceedings Volume PC13106, Photonics for Quantum 2024; PC1310606 (2024) https://doi.org/10.1117/12.3028527
Event: Photonics for Quantum, 2024, Waterloo, Ontario, Canada

Abstract

Quantum sources that produce entangled photon pairs are crucial and indispensable components in quantum applications. Entangled photon sources based on nonlinear crystals or waveguides require bulky free-space optics and precision alignment. In contrast, fiber-based entangled photon sources, where entangled photon pairs are directly generated in an optical fiber, make quantum technologies less costly, more practical and accessible, as well as compatible with telecom fiber network infrastructure. In this talk, we review the development of fiber-based entangled and hyper-entangled photon pair sources based on the periodically-poled silica fiber (PPSF). We demonstrate practical and high quality entanglement sources at room temperature, compact and alignment free. The technology has now been commercialized. My talk will reveal the key technological advantages of using PPSF as a nonlinear material for complex quantum state generation, including entangled, hyper-entangled, and hypo-entangled state generation. I will also briefly discuss the applications of polarization-frequency hyper-entanglement and characterization of high-dimensional entanglement systems, including deriving entanglement witnesses using machine learning.

Conference Presentation

Citation Download Citation

Li Qian and Alexander Greenwood "Periodically-poled silica fiber as a versatile quantum source", Proc. SPIE PC13106, Photonics for Quantum 2024, PC1310606 (2 August 2024); https://doi.org/10.1117/12.3028527

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