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Secure key distribution over a 500 km long link using a Raman ultra‐long fiber laser
Author(s) -
ElTaher Atalla,
Kotlicki Omer,
Harper Paul,
Turitsyn Sergei,
Scheuer Jacob
Publication year - 2014
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201300177
Subject(s) - transmitter , key (lock) , laser , transmission (telecommunications) , computer science , optical communication , channel (broadcasting) , computer network , optical fiber , fiber laser , key distribution , quantum key distribution , secure communication , telecommunications , materials science , optoelectronics , optics , physics , computer security , public key cryptography , encryption , photon
In traditional communication systems the transmission medium is considered as a given characteristic of the channel, which does not depend on the properties of the transmitter and the receiver. Recent experimental demonstrations of the feasibility of extending the laser cavity over the whole communication link connecting the two parties, forming an ultra‐long fiber laser (UFL), have raised groundbreaking possibilities in communication and particularly in secure communications. Here, a 500 km long secure key distribution link based on Raman gain UFL is demonstrated. An error‐free distribution of a random key with an average rate of 100 bps between the users is demonstrated and the key is shown to be unrecoverable to an eavesdropper employing either time or frequency domain passive attacks.