894.6nm VCSEL GaAs Chip

A Vertical-Cavity Surface-Emitting Laser (VCSEL) is a type of semiconductor laser whose laser beam emits perpendicularly from the top surface.Developed based on Gallium Arsenide (GaAs) semiconductor material, it is distinct from LEDs (Light-Emitting Diodes) and LDs (Laser Diodes). Its structure consists of mirror layers, an active region, and metal contact layers. The two emission mirrors are P-type and N-type Distributed Bragg Reflectors (DBR). The active region is composed of quantum wells. An ohmic contact is formed by depositing a metal contact layer on the surface of the P-type DBR, with a circular emission aperture fabricated on the P-type DBR for laser output.