Low-noise cascaded frequency conversion of 637.2 nm light to the telecommunication C-band in a single-waveguide device
Year: 2025
Type: article
Abstract: Interconnected quantum devices are the building blocks of quantum networks, where state transduction plays a central role. The frequency conversion of photons into the telecommunication C-band is decisive in taking advantage of current low-loss transmission lines. Here, we report the difference frequency conversion of 637.2 nm fluorescent light from a cluster of NV centers in diamond to tunable wavelengths between 1559.0 nm and 1564.9 nm. In order to avoid detrimental noise from spontaneous emissions, we use a two-step conversion device based on a single-pumped periodically poled lithium niobate waveguide. We observed a total external (internal) conversion efficiency of 3.0 ± 0.1 (20.5 ± 0.8) % with a noise rate of 2.4 ± 0.8 (16 ± 5) cps/GHz.
Source: Optics Express
DOI: 10.1364/oe.561203
Authors: Fabrice von Chamier, Joscha Hanel, Chris Müller, Wanrong Li, Roger Alfredo Kögler, Oliver Benson
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
Funder: Senat von Berlin
OpenAlex ID: W4409454897