WHY ARE MOST LASER POINTERS RED? I NEED URGENT HELP PLEASE!! I need short answer
Answers
Answer:
Explanation:
Semiconductor lasers are materials limited. The red GaAs laser diodes were the first and cheapest laser available.
The next cab off the rank was green, but they are by no means simple lasers. They are in fact amazing pieces of laser engineering, using an infrared pump laser at 800 nm to pump a gain medium lasing at 1064nm, which is then frequency doubled to green at 532 mm.
Blue is simpler, using newly developed GaN laser diodes.
The problem with semiconductor lasers is that the colour depends on the semiconductor used, and there are very few semiconductors suitable for making visible lasers.
A laser is essentially a highly focused light source with amplified brightness. In fact, the word laser is an acronym that stands for Light Amplification by Stimulated Emission of Radiation (LASER).
The light that emerges from a simple semiconductor diode of shelf-bought lasers tends to be in the wavelength range of 700-800 nanometers, thereby ranging from orange to red in color.
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