Chaotic optical data encryption using external-cavity VCSELs

被引:2
|
作者
Hong, YH [1 ]
Lee, MW [1 ]
Shore, KA [1 ]
机构
[1] Univ Coll N Wales, Sch Informat, Bangor LL57 1UT, Gwynedd, Wales
关键词
chaos; vertical cavity surface emitting lasers; polarisation; chaos synchronisation; optical communications;
D O I
10.1117/12.577510
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Optical synchronisation of chaos in unidirectionally coupled external cavity vertical-cavity surface-emitting semiconductor lasers (VCSELs) has been experimentally achieved. The polarisation of the injected beam is perpendicular to that of the free-running receiver (x-polarisation). Normal (positive-slope) synchronisation is observed between the injected beam and the y-polarized component of the receiver. However, due to the anti-phase dynamics of the receiver, an inverse (negative-slope) synchronisation is found between the injected beam and the x-polarized component of the receiver. A 200 MHz message has been successfully encoded in an external-cavity VCSEL transmitter and decoded in a receiver. Message recovery has been achieved with about 9 dB signal-to-noise ratio.
引用
收藏
页码:72 / 78
页数:7
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