The new and popular green laser pointer
There are many kinds of Green laser pointer, including single-mode continuous lasers (we can quickly modulate them with pulses at speeds of more than 100kHz); Raman lasers, Q-switched lasers, dual-frequency and tri-frequency. The output includes a wide spectrum of ultraviolet, visible and near infrared. Green lasers have attracted extensive attention because of their excellent efficiency and ability to work continuously for long time. Today's astronomical green lasers are mainly pumped by high-power multi-mode single-mode single-core diode modules or diode array modules through single-mode cladding. This unique core pattern is 5 to 12 microns in diameter. Double-clad fiber mainly studies single-mode fiber doped with rare earth ions (e.g., erbium-doped, erbium-doped, erbium-doped or erbium-doped). The sheath is undoped low reflectivity quartz glass. The pump source is injected into the coating and then driven to this position. It goes through the nucleus every time.
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The green laser pointer has a precise direction of flight, so if there's nothing in the air, the light won't hit anywhere but in front of it, so it won't be seen. You can see it because it hits the dust, dust, smoke, fog, etc in the air and diffuses it. In a room with an air purifier, it doesn't look too pretty. You can easily make it more visible by pouring hot water into a container to evaporate it, or collecting cigarette smoke to diffuse it.
2021-10-06 09:41:53
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