Solid material between the active ion density between the gas and the semiconductor. Metastable solid materials relatively long life span, spontaneous emission of energy loss, energy storage capability, so suitable for the use of so-called Q-technology to produce high-power pulsed laser. In addition, the fluorescence line of solid materials, a wide, by “locking” can be obtained after ultra-short pulses of intense laser radiation. Solid-state lasers, the ruby is a three-level system, the rest are mostly four-level system. Solid-state lasers are usually used for optical excitation pump light, so the life and efficiency of the pump light by the restrictions. However, small and rugged solid devices, high power pulsed radiation, so a wider range of applications. The 200mW Laser Pointer looks decent in exterior condition.Small size of the solid material in semiconductor lasers, allowing a large number of electron flow freely inside it called conductors; only a very small number of electrons is called an insulator; electrical conductivity was higher than the insulator below the conductor called semiconductors. Laser material using semiconductor lasers work called semiconductor lasers. Although the semiconductor itself is a solid, but light on the mechanism of solid-state lasers with essentially not much different. However, due to the different structure of the semiconductor material to generate the laser stimulated radiative transition of the high energy level and low level are the “conduction band” and “valence band” radiation is the electron and “hole” complex results, with their uniqueness, so did not include it in solid-state lasers. Semiconductor laser work dozens of materials, is more mature GaAs (GaAs), doped aluminum gallium arsenide. Incentives pump light, electron bombardment, electrical injection and so on.The green laster pointer is the first choice if you want to present a gift someone. Semiconductor lasers small size, light weight, long life, simple structure, therefore, particularly suitable for aircraft, ships, vehicles and spacecraft use. Some semiconductor lasers can be applied electric field, magnetic field, temperature, pressure and other changes in the laser wavelength, the so-called tuning, the output can be easily modulated beam; semiconductor laser wavelength range of 0? 32 to 34 microns, more broad . It can convert electrical energy directly the laser energy, the efficiency reached 10%. All of it attention, so rapidly, has been widely used in laser communications, ranging, radar, simulations, alert, ignition off, and automatic control and so on.100mW laser pointer is controlled by laser switch. The biggest drawback is that semiconductor lasers: laser properties affected by temperature, such as gallium arsenide laser, when the temperature from the absolute temperature 77 ° K to room temperature changes, the laser wavelength from 0? 84 changes to 0? 91 microns. In addition, the efficiency may be high, but small, the total power is not high, at room temperature a few tens of milliwatts of continuous output, pulse output only a few watts to tens of watts. Beam divergence angle, generally a few degrees to 20 degrees, so directional, monochromatic and coherent nature so poor. Simple structure of the gas laser in the laser gas as the working substance called gas lasers. It is the most varieties, is widely used class of lasers. Monochrome and coherence are better, more stable a long time to work, most of them can work continuously.You can punctuate emphasis of the briefing on screen by 10mW blue violet laser pointer. Laser wavelength has reached thousands of species widely distributed in the ultraviolet to far infrared range. In general, gas lasers, simple structure, low cost, easy to operate. Because of these advantages, in the civil and scientific research, such as industry, agriculture, medicine, precision measurement, holography, etc. is widely used.
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