High-frequency chaotic dynamics enabled by optical phase-conjugation

被引：23
作者：
Mercier, Emeric [1 ,2 ]
Wolfersberger, Delphine [1 ,2 ]
Sciamanna, Marc [1 ,2 ]
机构：
[1] Univ Paris Saclay, Cent Supelec, OPTEL Opt & Elect Res Grp, LMOPS, F-57070 Metz, France
[2] Univ Lorraine, Cent Supelec, OPTEL Opt & Elect Res Grp, LMOPS, F-57070 Metz, France
来源：
SCIENTIFIC REPORTS | 2016年 / 6卷
关键词：
RANDOM BIT GENERATION; SEMICONDUCTOR-LASERS; COHERENCE COLLAPSE; DIODE; FEEDBACK; COMMUNICATION; ITINERANCY;
D O I：
10.1038/srep18988
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Wideband chaos is of interest for applications such as random number generation or encrypted communications, which typically use optical feedback in a semiconductor laser. Here, we show that replacing conventional optical feedback with phase-conjugate feedback improves the chaos bandwidth. In the range of achievable phase-conjugate mirror reflectivities, the bandwidth increase reaches 27% when compared with feedback from a conventional mirror. Experimental measurements of the time-resolved frequency dynamics on nanosecond time-scales show that the bandwidth enhancement is related to the onset of self-pulsing solutions at harmonics of the external-cavity frequency. In the observed regime, the system follows a chaotic itinerancy among these destabilized high-frequency external-cavity modes. The recorded features are unique to phase-conjugate feedback and distinguish it from the long-standing problem of time-delayed feedback dynamics.
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页数：6
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