| Project/Area Number |
09650040
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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 | Muroran Institute of Technology |
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Principal Investigator |
MIYANAGA Shigeki Muroran Institute of Technology, Department of Electrical and Electronic Engineering, Associate Professor, 工学部, 助教授 (70182037)
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| Project Period (FY) |
1997 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 1998: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1997: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | phase-conjugate wave / degenerate four-wave mixing / dye-doped films / saturable absorption / polarization property / xanthene dyes |
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| Research Abstract |
Polarization-dependent phase-conjugate (PC) reflectivity is one of the most fundamental properties for the application of PC waves to real-time optical information processing devices. The aim of this work is to clarify the polarization dependence of the PC reflectivity by degenerate four-wave mixing (DFWM) with the use of saturable absorption effect in dye-doped films. For this purpose, the measurements were conducted on the polarization dependence and the temporal response of the PC reflectivity as well as on non-linear transmission properties, and the results were compared with those of theoretical analysis based on a four-energy-level model :
(1) Changes in the temporal response, which depend on light irradiation as well as on light intensity of input pump waves, were observed in the transient properties of the polarization-dependent PC reflectivity and the non-linear transmission. Simultaneous measurements of the characteristics of phosphorescence and a recorded component of the PC waves showed that these phenomena are attributed to the influences of humidity and residual solvent in the dye-doped films. It was found that these influences can be removed by the careful control on drying process and on preserving condition of the samples.
(2) By taking care to eliminate the above influences, the pump-intensity dependence of the PC reflectivity by DFWM was measured in the case of a probe wave being polarized either parallel or perpendicular to the pump waves. The comparison of these results with the theoretical ones revealed that the theoretical calculations can considerably well explain the experimental results under a wide range of experimental conditions. The condition of obtaining vectorial phase conjugation was also predicted theoretically in accordance with the experimental result.
(3) In the application to real-time PC interferometry, the optimum parameters for sample preparation and experimental conditions could predicted from the theoretical considerations.
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