2016 Fiscal Year Final Research Report
Orbital instability of chaotic laser diode applying complex signal and its application to secure communication
| Project/Area Number |
26790059
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Optical engineering, Photon science
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| Research Institution | Niigata Institute of Technology (2015-2016)
Waseda University (2014) |
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Principal Investigator |
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| Research Collaborator |
ISHINARI Michito
NAKAO Toshiya
ISHIKAWA Atsushi
SAKAGUCHI Satoshi
ISHIHARA Taiki
TOYAMA Haruhisa
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 半導体レーザーのカオス発振 / レーザーカオス |
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| Outline of Final Research Achievements |
The chaotic dynamics of a laser diode (LD) system with optical injection is studied, where an additional signal is applied to the drive current of the master LD. We found that the orbital instability of the LD system is enhanced by applying a pseudorandom signal, and the result showed good agreement that of linear stability analysis. Then we investigated the response of the orbital instability to the frequency range of the applied signal and confirmed a similar trend between this response and the spectrum of the LD system. Moreover, we compared the effect of using a chaotic signal and a band-limited pseudorandom signal having a similar spectrum to the chaotic signal as the applied signal. We showed that the spectrum of the applied signal is a factor affecting the orbital instability of an LD system, and that the use of a pseudorandom signal as the applied signal more greatly enhances the orbital instability than the use of a chaotic signal.
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| Free Research Field |
応用光学，光通信工学
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