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NTT demonstrates lossless wavelength conversion of single photons in an optical fiber

Nippon Telegraph and Telephone Corporation (NTT) have demonstrated a new scheme for the wavelength conversion of a single-photon wave packet required for quantum information-communication technologies. The scheme enables us to deterministically change the color and shape of a single-photon wave packet in a lossless manner. The scheme, directly applicable to single photons travelling in an optical fiber network, will be a key technology toward the development of a photonic wavelength interface for quantum networking.

Wavelength (frequency, color) is an important physical parameter of light, and wavelength conversion is necessary for current photonics technologies. Applications of wavelength conversion range from simple device like laser pointers to the fields of communications, precision measurement, and biomedical sciences.This work was supported by Grants-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS).

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