Open AccessHigh-speed physical key distribution based on dispersion-shift-keying chaos synchronization in commonly driven semiconductor lasers without external feedback
Author(s) -
Longsheng Wang,
Chao Meng,
Anbang Wang,
Hua Gao,
Song-Sui Li,
Yuanyuan Guo,
Yuncai Wang,
Lianshan Yan
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.412068
Subject(s) - laser , synchronization (alternating current) , semiconductor laser theory , quantum key distribution , dispersion (optics) , key generation , computer science , physics , optics , electronic engineering , telecommunications , cryptography , engineering , channel (broadcasting) , photon , computer security
We propose a scheme of high-speed physical key distribution based on dispersion-shift-keying chaos synchronization in two semiconductor lasers without external feedback (response lasers), which are driven by a common external-cavity semiconductor laser (drive laser). In this scheme, the dispersion introduces a laser field beating-induced nonlinear transformation to the outputs of drive laser and renders the correlation elimination between the drive and response lasers improving the security of key distribution. Moreover, the commonly driven lasers without external feedback constitute an open-loop synchronization configuration and yield a short synchronization recovery time of a subnanosecond supporting the implementation of high-speed key distribution. With these two merits, we numerically demonstrate a 1.2 Gb/s secure key distribution with a bit error ratio below 3.8×10 -3 .