Laser radiation has many unique properties, such as highly focused, beam profile and selectable monochromatic wavelength, that suitable for many application in industry, biology technology as well as environmental processing. National Center for Laser Technology have developed the laser devices with application-oriented in the Industry is one of the key directions of us. | VNU Journal of Science: Mathematics – Physics, Vol. 33, No. 2 (2017) 24-28 Development of a Solid-state Laser for Metal Marking Equipment Giang Manh Khoi1,2,*, Do Xuan Tien2, Trinh Dinh Chien1 1 Faculty of Physics, VNU University of Science, 334 Nguyen Trai, Hanoi, Vietnam 2 National Centre for Technology Progress, 25 Le Thanh Tong, Hanoi, Vietnam Received 17 March 2017 Revised 28 April 2017; Accepted 02 June 2017 Abstract: Laser radiation has many unique properties, such as highly focused, beam profile and selectable monochromatic wavelength, that suitable for many application in industry, biology technology as well as environmental processing. National Center for Laser Technology have developed the laser devices with application-oriented in the Industry is one of the key directions of us. With the active support of National Center for Technological Progress, we have successfully studied and mastered the technology to manufacture the laser equipments for industrial applications. In this report, we will introduce the technologies in the industrial laser equipments and the customers are trusting. Keywords: Industrial laser, Nd:YAG laser. 1. Introduction Material processing effectiveness depends on the ability to absorb laser energy and interaction time of laser radiation. Therefore, the possibility of engraving on the different metal materials mainly depends on the optical-thermal properties of metallic materials. Using high-power laser pulses can reduce the reflectivity of surface of metal parts and can choose the suitable power of the laser radiation to resolve technology issues. Technology of engraving on metal material selected from the opticalthermal changing process of the material is shown in Figure 1 diagrams. Fig 1. The changing of temperature of focused laser beam: 1 – start pulse, 2 – processing pulse. _ Corresponding author. Tel.: 84-84-903227858. Email: khoigm02@ 24 . Khoi et
