Green laser pointer can remotely control the computers

Optical incentive (optical pumping). The light emitted to the outside light irradiation of the working substance in order to achieve population inversion laser, the entire incentive device, usually by the gas-discharge light sources (such as xenon lamps, krypton lamp) and condenser composition, such incentives are also known as as lamp-pumped. Gas discharge excitation. To achieve population inversion, the entire incentive devices typically discharge electrode and the discharge power is the use of gas discharge processes occurring in the gas working substance. Chemical incentives. Is the use of the process of chemical reactions that occur within the working substance to achieve population inversion, usually requires appropriate chemical reactants and the corresponding trigger measures. green laser pointer    is the 3 in 1 type.
Nuclear energy incentives. Is the fission fragments produced by the use of a small nuclear fission reaction, high-energy particles or radiation work to motivate the material and to achieve population inversion. Usually a combination of a certain way by certain geometric shapes and optical reflective properties of the two mirrors. Role as follows: (1) to provide optical feedback capacity, so that stimulated emission photons in the cavity, multiple trips to the formation of a coherent and sustained oscillation. ② direction and frequency of the cavity between the oscillating beam limit in order to ensure that the output laser has a certain directivity and monochromaticity. The role of cavity ① is usually composed of two mirror cavity geometry (radius of curvature of the reflecting surface) and relative combinations. The packing list of   green laser pointer    contains many things.
Role ② The given cavity type cavity direction of travel and different frequencies of light have different selective loss characteristics determined. Types of lasers are many. Below, respectively, from the laser material incentives operation, the output wavelength range of several laser classification introduced. Classified according to the working substance. All laser is divided into the following categories: (1) solid-state lasers (crystal and glass), this type of laser used in the working substance is by metal ions doped able to generate stimulated emission of the role of state different from the work of Matter constitute the luminescence center and made into a crystal or glass matrix. The material color of              green laser pointer     is black.
Gas lasers, they used material is gas, and really generated by stimulated emission of the role of particle properties different according to the gas, and further divided into atomic gas lasers, ion gas lasers, molecular gas lasers, excimer gas lasers work material; ③ liquid lasers, these lasers are used mainly include two categories, an organic fluorescent dye solution, the other is the solution of inorganic compounds containing rare earth metal ions, in which metal ions (Nd) from the work of particle effect , and inorganic compounds, liquid (eg SeOCl) since the role of the matrix; ④ semiconductor lasers, these lasers are semiconductor materials for working material generated by stimulated emission effect. What’s more, USB flash disks could also be integrated into   usa green laser pointer    .
The principle is that through certain incentives (power injected into the optical pump or high-energy electron beam injection), the number of particles through the excitation of non-equilibrium carriers between the semiconductor material of the band or the band and impurity level between anti- turn, produce light by stimulated emission of the role; ⑤ free electron laser, which is a special type of a new type of laser, the working substance in the space cycle changes in the magnetic field in high-speed motion directed free-electron beam, as long as the change in free electron beam speed can generate tunable coherent electromagnetic radiation, in principle, their coherent radiation spectrum from X-ray band transition to the microwave region, and therefore has a very attractive prospect. By incentives.    green laser pointer can remotely control the computers.