期刊
LASER & PHOTONICS REVIEWS
卷 8, 期 3, 页码 436-442出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/lpor.201300177
关键词
fiber laser; Raman; Secure communications; laser dynamics
资金
- British Council BIRAX program
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 500km 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.
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