2004 Fiscal Year Final Research Report Summary
Development of a Random modulated CW LIDAR for measuring atmospheric molecules related to earth warming
| Project/Area Number |
14550045
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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 | Ariake National College of Technology |
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Principal Investigator |
UCHIUMI Michihiro Ariake National College of Technology, Professor, 電子情報工学科, 教授 (10213430)
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| Co-Investigator(Kenkyū-buntansha) |
J. Vasa N. Kyushu University, Faculty of Interdisciplinary, Associate professor, 大学院・総合理工学研究院, 助教授 (40294904)
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| Project Period (FY) |
2002 – 2004
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| Keywords | CW laser / pseudo random modulated / Earth warming molecules / laser radar / LIDAR / Differential Absorption LIDAR / CO2 / water vapor |
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| Research Abstract |
The aim of this research is to investigate theoretically and experimentally the possibility of realization of RM-CW LIDARs, pseudo-randomly modulated CW laser radars, for measuring the atmospheric gas molecules related to earth warming and establish an RM-CW LIDAR mainly active in the wavelength region of the near infra-red. As the results of the theoretical simulation, it is found that it is possible to make an RM-CW LIDAR for atmospheric aerosol and water vapor. For the DIAL, differential absorption LIDAR, a laser emitting system with two CW lasers was made. A receiver is constructed with a 20cm diameter telescope, a PMT and an interference filter. In order to modulate the CW laser, the AOM devices were used. The CW lasers were tuned to the absorption lines of water vapor. The laser modulation was performed by a data generator based on the maximum shift register sequence.
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