The burning ability of class IV laser is the best
It is available for civilian use with a height of 5,000mW (5 watts). But what is the appropriate power to generate enough heat to be considered a "burning green laser pointer"? As a general rule, you need at least 200mW of power to light matches and blast balloons, but the higher the power, the better the burning ability. Class IV lasers are the most ideal for combustion capability because they are all 500mW or higher. Class III may be applicable, but only at the high end of the power spectrum (200mW-499mW). The laser modification enhancement technology uses a high-energy density laser to scan the target surface at high speed. After the target surface temperature suddenly rises above the modification point, it is rapidly cooled by the thermal conductivity of the metal body. A technology that forms an ultra-fine hardened structure with a depth of 0.5 to 2.0 mm on the surface.
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PIN photodiodes and PIN photodiodes generate photocurrent when receiving light output, and also generate quantum noise. Avalanche photodiodes and avalanche photodiodes can be expanded internally. It has a longer transmission distance than a PIN photodiode, but the quantum noise is much larger. In order to obtain a good signal-to-noise ratio, it is necessary to connect a low-noise preamplifier and a main amplifier behind the optical detector. The working principle of semiconductor laser diode is theoretically the same as that of gas high power laser pointer. Light emission in semiconductors is usually due to carrier bonding. The PN junction of a semiconductor can lower the barrier of the PN junction when there is a forward voltage. Electrons are injected from the N area into the P area through the PN junction, and holes are injected from the P area to the N area through the PN junction. Will be injected. The unbalanced electrons and holes injected near these PN junctions form a junction and emit photons with a wavelength of λ.
2022-01-06 11:41:30
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