tailieunhanh - Development of uv laser source based on distributed feedback dye lasers for use in measurement of ozone in the lower atmosphere

This system has been set up and it generates selected wavelenghts at nm and nm with the energy of 30 µJ/pulse and 60 µJ/pulse respectively. A DIAL system using this UV transmitter is designed to measure the vertical distribution of ozone with high temporal and spatial resolution. Our simulations of received DIAL signal indicate that the altitude of ozone distribution measurement can reach to over 5000 m along with range resolution of 100 m. | Communications in Physics, Vol. 27, No. 4 (2017), pp. 345-355 DOI: DEVELOPMENT OF UV LASER SOURCE BASED ON DISTRIBUTED FEEDBACK DYE LASERS FOR USE IN MEASUREMENT OF OZONE IN THE LOWER ATMOSPHERE TIEN PHAM MINHa,b,† , HAI BUI VANc , THO DUONG TIENb , HOA DO QUANGd AND TRUNG DINH VANd a Ho Chi Minh City Institute of Physics, Vietnam Academy of Science and Technology, 1 Mac Dinh Chi Str., Dist. 1, Ho Chi Minh City, Vietnam b Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam c Technical University of Le Qui Don, 236 Hoang Quoc Viet, Hanoi, Vietnam d Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam † E-mail: pmtien@ Received 10 October 2017 Accepted for publication 27 October 2017 Published 22 December 2017 Abstract. We studied to develop a transmitter consisting of two Distributed Feedback Dye Lasers (DFDL) using Rhodamine 6G as an active medium, pumped by a frequency-doubled Nd:YAG laser (5 ns, 10 Hz, 532 nm). The BBO crystals are used for frequency-doubling of DFDLs to generate UV emissions. This system has been set up and it generates selected wavelenghts at nm and nm with the energy of 30 µJ/pulse and 60 µJ/pulse respectively. A DIAL system using this UV transmitter is designed to measure the vertical distribution of ozone with high temporal and spatial resolution. Our simulations of received DIAL signal indicate that the altitude of ozone distribution measurement can reach to over 5000 m along with range resolution of 100 m. Keywords: DIAL, distributed feedback dye laser, ozone vertical measurement. Classification numbers: ; ; . c 2017 Vietnam Academy of Science and Technology 346 DEVELOPMENT OF UV LASER SOURCE BASED ON DISTRIBUTED FEEDBACK DYE LASERS FOR USE . I. INTRODUCTION In the Earth’s atmosphere, most of the ozone (about 90%) is found