The energy of the laser pointer
It uses a blue-violet laser diode with a wavelength of 405nm, which is a semiconductor laser, close to the ultraviolet band, with low visibility, but can excite fluorescence, and has the effect of silver and test chemicals. The 3000mW green laser has created the greatest miracle of the invisible beam laser green diode technology. Considered the most brilliant breakthrough in finished laser diodes, this high-power portable laser emits an extremely strong green laser pointer color with a range of at least 10,000 meters. Made great contributions to industrial lighting, alignment, medical treatment, laboratory experiments, etc. There are two main types of laser pointers that dominate the commercial market. Edge-emitting diode lasers have a very asymmetric cavity, resulting in polarization in an electric field in the "vertical" direction (perpendicular to the chip surface), IIRC. Another type of VCSEL has a more symmetrical cavity that can be polarized in either direction (although they usually have enough asymmetry to choose to have two preferred polarization axes).
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The most common way to generate a 532 nm high powered laser beam is to use a 1064 nm laser diode with a frequency doubling element. When excited by an energy source, the laser medium usually emits photons of specific spectral lines. The wavelength is determined by the different quantum energy levels or energy states of the material. Usually, most of the atoms in the medium are in the ground state. A small part will also exist in higher energies. Usually, these higher energy states are unstable, and electrons release this excess energy in the form of photons almost immediately and return to the ground state. In some materials, especially those selected as the laser medium, a metastable state may appear, in which atoms or molecules will remain excited for a period of time.
2021-12-31 09:59:58
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