Design and Construct of Nd:YAG Laser and Using it in the Laser Ablation Process of Silver, Titanium and Zinc Element

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Gohari kamel, Nasser | 2014

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 45271 (04)
University: Sharif University of Technology
Department: Physics
Advisor(s): Sadighi Bonabi, Rasoul
Abstract:
The purpose of this project is to investigate the production of nano-micro metallic particles—of different elements—with different characteristics in size and optical property by employing a pulsed laser ablation processes in liquid medium. In this study, the means by which we build the laser, the experimental arrangement of the pulsed laser ablation process, the measurement of the absorption spectrum of generated nano-micro particles as well as the size of the particles are discussed.
To satiate this aim, we have expressed the manner of constructing the Nd:YAG laser, the power supply circuits, along with its optics. This laser has some advantages such as high energy ~700mj, good stability, reasonable durability ~60μs, and adjustable number of pulse repetition rate (1 to 10Hz).
Subsequently, by exploiting the laser, process of laser ablation for three elements (silver, zinc, and titanium); in different solution environments (water and acetone); various laser parameters (repetition rate and energy alterations) have studied. In addition, absorption wavelengths and size of nano-micro particles which produced in various modes have been reported
Keywords:
Nanoparticles ; Absorption Spectroscopy ; Scanning Electron Microscopy (SEM) ; ND: Yag Laser ; Laser Ablation Process

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