Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Quantum key distribution at telecom wavelengths with noise-free detectors



Danna Rosenberg, Sae Woo Nam, Philip A. Hiskett, Charles G. Peterson, Richard J. Hughes, Jane E. Nordholt, Adriana Lita, Aaron J. Miller


The length of a secure link over which a quantum key can be distributed depends on the efficiency and dark-count rate of the detectors used at the receiver. We report on the first demonstration of quantum key distribution using transition-edge sensors with high efficiency and negligible dark-count rates. Using two methods of synchronization, a bright optical pulse scheme and an electrical signal scheme, we have successfully distributed key material at 1550 nm over 50 km of optical fiber. We discuss how use of these detectors in a quantum key distribution system can result in dramatic increases in range and performance.
Applied Physics Letters


fiber optic, quantum information, quantum key distribution, quatnum communication, single photon detectors, transition-edge sensor


Rosenberg, D. , Nam, S. , Hiskett, P. , Peterson, C. , Hughes, R. , Nordholt, J. , Lita, A. and Miller, A. (2006), Quantum key distribution at telecom wavelengths with noise-free detectors, Applied Physics Letters, [online], (Accessed April 21, 2024)
Created January 12, 2006, Updated October 12, 2021