Low-loss telecom-band nanofiber cavity for interfacing Yb atomic qubits

作者：Seitaro Horikawa, S. Kato, Ryotaro Inoue, Takao Aoki, Akihisa Goban, Hideki Konishi · 发表于：Optics Letters · 年份：2025 · DOI：10.1364/ol.570362 · 被引用次数：3 · 研究领域：Quantum Information and Cryptography、Mechanical and Optical Resonators、Quantum optics and atomic interactions

We demonstrate the fabrication of an optical nanofiber cavity designed for efficient interface with ytterbium (Yb) atoms at telecom-wavelength transitions. Replacing the conventional hydrogen-oxygen flame with a deuterium-oxygen flame in the heat-and-pull method suppresses hydroxyl-induced absorption losses and enables low-loss nanofiber production with minimal modifications to the existing fabrication system. Using this technique, we fabricate a nanofiber cavity at 1389 nm that exhibits an intrinsic round-trip loss of 0.31(2)% and a finesse of 2.0(1)×10 3 . This performance corresponds to a projected cooperativity of 90 when interfaced with Yb atoms, indicating that the cavity is well suited for efficient atom–photon coupling at telecom-wavelength transitions. Our results establish a practical route for developing fiber-integrated atom–photon interfaces in the telecom band, a critical step toward scalable quantum communication and distributed quantum computing.