Laser Diode (LD) is an electronic component that integrates advanced semiconductor technology and laser technology. The basic structure of a laser diode consists of two mirrors that reflect each other, one of which is completely reflected and the other is partially transmitted. Between the two mirrors, the gain medium is formed by the doped semiconductor material. When an electric current passes through, electrons transition in the semiconductor material, producing stimulated radiation, which amplifies the photons and forms a laser. Its core lies in its PN junction structure. When the forward current passes through the PN junction, the electron meets the hole and recombines, releasing energy and forming a laser. This kind of laser not only has high brightness, energy concentration, but also has excellent directivity and coherence, making the laser diode an ideal choice for high-precision and high-efficiency photoelectric conversion.

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