The synthesis of embedded nanosphere particles in Nd:YAG crystals has been studied by gold ion implantation and thermal annealing. The surface plasmon resonance effect (SPR) has been generated, making the linear and nonlinear absorption of Nd:YAG crystals in visible light. Significant enhancement. Among them, the nonlinear absorption coefficient of the crystal has been increased by 5 orders of magnitude, and at the same time it shows a pronounced saturable absorption characteristic. Using Au:YAG as a saturable absorber, a Q-switched pulsed laser output with a wavelength of 639 nm is realized. By changing the injection dose of gold ions, the linear and nonlinear optical properties of the material can be effectively controlled, thereby providing a new scheme for enhancing and regulating the nonlinear properties of dielectric materials, providing a basis for the application in the generation of pulsed lasers. .
Studies have made the linear and nonlinear absorption of Nd:YAG crystals significantly enhanced in the visible region. By changing the implanted dose of gold ions, the linear and nonlinear optical properties of materials can be effectively controlled, thereby enhancing and regulating the nonlinear properties of dielectric materials. A new scheme is provided, which provides the basis for the application of pulsed laser generation. The research results provide a direction for follow-up research and is of great significance.
An ion beam is a group of ions that move in nearly the same direction at approximately the same speed. The ion source is used to obtain the ion beam. Among all kinds of ion sources, the most used is the plasma ion source, which is to use an electric field. Ions are extracted from a plasma. The main parameters of this type of ion source are determined by the density of the plasma, the temperature, and the quality of the extraction system. Among these ion sources are: Penning discharge type ion source radio frequency ion source, microwave Ion sources, dual plasma sources, Fulemann ion sources, etc. The other type of ion source used more often is the electron collision type ion source, which is mainly used in various mass spectrometer instruments.
The main parameters of the ion source are: 1 The ion beam current is strong. That is, the equivalent current intensity of the useful ion beam can be obtained, expressed by the current unit A or mA. 2 Useful ion percentage. That is, the useful ion beam is the percentage of the total ion beam. In general, the total ion beam given by the ion source includes singly-charged ions, multiply-charged ions, ion ions of various molecular ions and impurity element ions, etc. 3 Energy divergence. Due to the thermal movement of ions and the location of extraction, The energy of the ion beam given by the ion source has some dispersion to the required single energy. Generally, it is desired that the energy divergence be as small as possible. This is especially true in high-precision ion beam applications. The focusing performance of 4 beams. The angle of Angular indicates that the poorly focused ion beam will cause a large amount of ions to be lost during the transmission. The ultimate obstacle to obtaining a well-focused ion beam is the electrostatic repulsion between the ions in the beam. To overcome this obstacle, it should be as soon as possible. Makes ions get higher energy. 5 The efficiency of the ion source. The working substance that leads out in the form of ion beam occupies the proportion of the total consumed working substance. 6 Working life. The ion source installs once After the time of use.