A re-entrant chip-free-space photonic interface for telecom-to-Rubidium spectroscopy

Jia-Lin Chen, Ruixin Zhou, Deng-Hong Liu +13

The paper presents a re‑entrant chip‑free‑space interface where a thin‑film lithium niobate photonic circuit frequency‑doubles telecom light to 780 nm, sends it through a rubidium…