Cascaded downconversion interface to convert single-photon-level signals at 650  nm to the telecom band

• Published in: Optics letters Vol. 43; no. 22; p. 5655
• Main Authors: Esfandyarpour, Vahid, Langrock, Carsten, Fejer, Martin
• Format: Journal Article
• Language: English
• Published: United States 15.11.2018

We present a device designed for two-step downconversion of single-photon-level signals at 650 nm to the 1.5-μm band with low excess noise and low required pump power as a quantum interface between matter-qubit-based nodes and low-loss photonic channels for quantum communication networks. The requir...