| Project/Area Number |
10650040
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | Shizuoka University |
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Principal Investigator |
OHTSUBO Junji Shizuoka University, Faculty of Engineering, Professor, 工学部, 教授 (00176942)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥4,000,000 (Direct Cost: ¥4,000,000)
Fiscal Year 1999: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1998: ¥2,700,000 (Direct Cost: ¥2,700,000)
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| Keywords | Semiconductor lasers / Optical Chaos / Phase-Conjugate Optics / Nonlinear Optical Dynamics / Laser Control / Chaos Synchronizaiton / 戻り光 |
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| Research Abstract |
A semiconductor laser is destabilized easily by a feedback from an external reflector and the performance of a system employing a semiconductor laser as a light source is much degraded in the presence of optical feedback to the laser. This instability is derived from the nonlinear dynamics involved in the system and is known as chaos in the system. In the meantime, a semiconductor laser is used as a light source for phase-conjugate optics. The effects of Phase-conjugate feedback to a semiconductor laser are very important since the reflected light by a phase-conjugate mirror is automatically fed back to the light source. However, a few researches have been done in this area. In this project, the dynamics of semiconductor lasers with phase-conjugate feedback have been extensively investigated and the differences between feedback from phase-conjugate and ordinary mirrors have been clarified. Applications of phase-conjugate feedback in semiconductor lasers have been also investigated. As a result, effective laser control and noise suppression have been attained by phase-conjugate feedback. Chaos synchronization for secure communications has been studied and it has been proved that semiconductor laser with phase-conjugate feedback can be used as a high performance chaos generating module for chaos communication systems.
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