Atmospheric Observation by Airborne Lidar Using a Silicon-Avalanche Photodiode Single Photon Counting Module
| Autor: | Kenji Tatsumi, Yasuaki Kawamura, Tadashi Imai |
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| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | The Review of Laser Engineering. 27:40-44 |
| ISSN: | 1349-6603 0387-0200 |
| Popis: | A solid-state airborne lidar for profiling cloud and aerosol scattering has been demonstrated.The transmitter of the lidar is a laser diode-pumped Q-switched Nd: YLF laser. The wavelength of the laser is 1053 nm, the output energy from the transmitter optics is 16.5mJ and the repetition rate is 50 pps. Eye safety is obtained through beam expansion, for which divergence is 2.6 mrad. The diameter of the telescope made of beryllium is 200 mm, and the field of view is 0.3 mrad. The receiver employs a photon-counting solid-state Geiger-mode avalanche photodiode. The vertical resolution is 75 m. The received signals were integrated 300 times in the horizontal direction to improve the signal-to-noise ratio. The measurements for air moleculesaerosol, and cloud were performed using the lidar in November, 1997. The airplane made a round trip from Nagoya airport to Tsukuba via Kashima nada. The altitude of the airplane was 6, 150 m. The measurements indicate that the lidar is capable of detecting and profiling cloud and aerosol scattering through the atmosphere. |
| Databáze: | OpenAIRE |
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