The semiconductor laser G-type is a dual heterojunction laser consisting of an active layer with a small bandgap and two secondary helper layers with larger bandgaps. By injecting a current in the active layer, the complexation of electrons and holes is excited, resulting in laser radiation. The semiconductor laser G-type has many advantages over other semiconductor lasers, such as lower threshold current, higher output power and faster modulation speed.
The semiconductor laser G-type is mainly used in the field of optical communications, such as fiber optic communications and fiber optic sensing. Its high-speed modulation capability and narrow-spectrum characteristics make it ideal for high-density data transmission and high-speed communications. In addition, the semiconductor laser G-type is used in the medical field, such as laser surgery and laser therapy, and in industrial applications, such as material processing and laser cutting.