Design and Fabrication of a Green-Blue Laser based on Harmonics Generation of Nd:YAG Laser for use in Marine LIDAR System

Ebadian, Hasan; Pezh, Alireza; Babaee Tooski, Majid; Maleki, Abbas

Design and Fabrication of a Green-Blue Laser based on Harmonics Generation of Nd:YAG Laser for use in Marine LIDAR System

Document Type : Original Article

Authors

hasan ebadian

Alireza Pezh

Majid Babaee Tooski

Abbas Maleki

Faculty of Applied Sciences, Malek Ashtar University of Technology

Abstract

In this paper, the experimental setup of a blue - green laser suitable for Marine LIDAR applications is discussed, which is designed and fabricated based on the second, third and fourth harmonics of Nd:YAG laser. Today, bathymetry and detection of objects under the water surface with the help of LIDAR systems are needed in various research and military fields. To produce green-blue laser radiation, here a combination of a pulsed Nd:YAG laser with an oscillator - amplifier structure along with nonlinear crystals KTP, DKDP and KDP is used to generate wavelengths of 532, 355 and 266 nm, respectively. With the pump pulse energy of 1.1 J, the maximum energy of 700, 220 and 65 mJ was obtained in the second, third and fourth harmonics of the Nd:YAG laser. The optical - to - optical conversion efficiency at wavelengths of 532, 355 and 266 nm is 64, 20 and 9%, respectively.

Keywords

Marine LIDAR

harmonic generation

phase matching

Nd:YAG laser

20.1001.1.24767131.1401.8.2.5.5

Subjects

انتشار امواج آکوستیکی، الکترومغناطیسی و ...

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