For high-power, miniaturized, low power consumption (operating voltage low), a small heat load and long life of steady work to create the conditions. Because of its wavelength in the ultraviolet band, good beam quality, a variety of high quality processing, four or five years is expected to become the main laser processing devices. Figure 6 shows the LD-pumped Nd: YAG lasers of different incentives in the form: (a) incentives for the end; (b) the incentive side, the output power up to 2kW, the frequency of 2.5kHz. Excimer laser (Excimer) the so-called excimer combination of molecules in the excited state and ground state atoms unstable association complex dissociation. green laser pointer is strict in parameter.
Used as a laser medium excimer KrF, XeCl, AeF and other gaseous substances. Issued by the laser is a UV-band laser structure and the CO 2 gas lasers. Ultraviolet excimer laser processing mechanism is more complex, the usual explanation is to rely on laser ablation (Laser Ablation) for ablation materials. Ultraviolet photon energy than the connection between the materials of molecular atomic energy, the material absorbed (absorption rate is high), the destruction of the original key connection and the formation of tiny fragments, fragments of the material on its own when the destruction reaches a certain program, peeling off. Each pulse can remove sub-micron depth of material, such a layer by layer ablation of materials, to processing purpose. green laser pointer is easy to carry away.
Laser ablation is to establish, on the basis of the photochemical reactions compared with other laser processing (heat), which is conducted in a non-heat mode, it is also known as laser cold. Excimer laser with wave length (190 ~ 350mm) high frequency (up to 5kHz), high efficiency (up to 4%), good beam quality (divergence angle 0.3mrad wavelength linewidth the 1pm less), long working life of the beam cross-section etc., is great potential for industrial lasers. Commercialization of device power 200W maximum power in the world is Japan's Mitsubishi Electric Corporation in 1994 successfully developed the XeCl laser discharge tube length 3m beam cross-section of 80mm × 40mm. usa green laser pointer is very portable.
CO laser wavelength is half of the CO 2 laser wavelength, therefore, the focusing of the beam and the absorbency of the material better than the CO 2 laser. For example, the cutting capacity of 3 kW CO laser with 5kW CO 2 laser. The largest CO laser up to 20kW. Copper vapor laser. Copper vapor laser is expected for the Microfabrication a laser. It can be used as replacement devices of harmonic YAG laser. The wavelength of visible light of 511 ~ 578nm, optical pulse width of 20 ~ 60ns, repetition rate ~ 32kHz, the devices have practical value of the output power of 10 ~ 120W, 750W devices are being studied. green laser pointer adopts the high quality chip.
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