Scalable temporal multiplexing of telecom photons via thin-film lithium niobate photonics

Çağın Ekici, Yonghe Yu, Jeremy C. Adcock, Alif Laila Muthali, Mujtaba Zahidy, Heyun Tan, Zhongjin Lin, Hao Li, Leif K. Oxenløwe, Xinlun Cai*, Yunhong Ding*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Efficient single-photon generation remains a big challenge in quantum photonics. A promising approach to overcome this challenge is to employ active multiplexing—repeating a nondeterministic photon pair generation process across orthogonal degrees of freedom and exploiting heralding to actively route the heralded photon to the desired single output mode via feedforward. The main barriers of multiplexing schemes, however, are minimizing resource requirements to allow scalability and the lack of availability of high-speed, low-loss switches. Here, we present an on-chip temporal multiplexing scheme utilizing thin-film lithium niobate (TFLN) photonics to effectively address these challenges. Our time-multiplexed source, operating at a rate of 62.2 MHz, enhances single-photon probability by a factor of 3.37 ± 0.05 without introducing additional multi-photon noise. This demonstration highlights the feasibility and potential of TFLN photonics for large-scale complex quantum information technologies.

Original languageEnglish
Article number21
Journalnpj Quantum Information
Volume11
Issue number1
ISSN2056-6387
DOIs
Publication statusPublished - Dec 2025

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