The light-emitting principle of the laser diode: The P-N junction in the laser diode is formed by two doped gallium arsenide layers.

A blue laser diode is a semiconductor laser that can generate a concentrated photon beam with a wavelength of about 400 to 500 nanometers (the visible electromagnetic spectrum region considered blue or violet by the human eye).

The color of light is determined by the wavelength (or frequency) of the light. A certain wavelength corresponds to a certain color.

The laser diode has three pins: LD transmitting terminal, PD receiving terminal, LD-N common terminal

Laser has many special properties, and people use these properties to create laser applications with special value in many aspects.

Fiber-coupled lasers are becoming more and more popular in the market in the field of laser processing due to their high electrical-optical conversion efficiency, high stability, high beam quality and low cost of use, and they are used as an extremely high-quality light source.