What Is Diode Laser

Semiconductor lasers, also known as laser diodes, are lasers that use semiconductor materials as working materials. Due to differences in material structure, the specific process of laser generation of different types is relatively special. Commonly used working substances include gallium arsenide(GaAs), cadmium sulfide(CdS), indium phosphate(InP), and zinc sulfide(ZnS). The excitation methods include electric injection, electron beam excitation and optical pump. Semiconductor laser devices can be divided into homogenous knots, monomorphic knots, and diheterojunction. Homojunction lasers and monoheterojunction lasers are mostly pulse devices at room temperature, while double Heterojunction lasers can work continuously at room temperature.
The semiconductor diode laser is the most practical and most important type of laser. It is small in size and long in life, and can be pumped with a simple injection of current to pump its operating voltage and current compatible with integrated circuits, so it can be integrated with a single chip. And you can also use the frequency up to GHz to directly modulate the current to obtain high speed.And ... Due to these advantages, semiconductor diode lasers have been widely used in laser communications, optical storage, optical gyroscopes, laser printing, ranging and radar.