What kind of diode is used for the green laser pointer?
Because the laser pointer has good directivity and concentrated energy, you can use it in many aspects of life, such as positioning, indication and signal transmission. However, due to its power, an object irradiated at a relatively close distance will absorb the energy emitted by the laser at the irradiated point, thereby converting it into heat energy, thereby increasing the temperature of the object. When the temperature is higher than the melting point or ignition point, it will melt or catch fire. The reason for the explosion of the balloon shown at the exhibition was that the temperature of the high powered laser was higher than the maximum temperature of the rubber support. Similarly, the laser on human tissues will also have a thermal effect. The most important part of the laser pointer is the luminous body, such as the quality of the crystal and diode, the luminous body is good or bad. For poor quality lasers, the price may be very cheap and the service life is very short.
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The green laser pointer comes from a diode-pumped green laser pointer diode, not a terminating laser diode. Professionals obtain the 532nm green laser in three steps. In the first step, a formal standard laser diode will produce infrared light with a wavelength close to 808nm. The second step is to focus the near-infrared light onto the neodymium crystal, which converts the light into a 1064 nm infrared laser. In the third step, the 1064nm infrared laser passes through the frequency doubling crystal and emits green light with a wavelength of 532nm. There is still a long way to go to get a finished green laser pointer from a standard laser diode. The laser filter will be designed inside the laser device to prevent the laser diode from leaking any infrared light. However, in the absence of infrared filters, green lasers of poor quality will be developed. When people point at a poor quality laser, an invisible infrared light signal is emitted at the same time. Invisible infrared rays are harmful to the eyes. As a general rule, we recommend that qualified personnel use special laser safety equipment to operate infrared lasers. Exposure of the eyes to infrared rays can cause indiscriminate or severe damage to the retina.
2021-12-23 09:25:00
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