Understanding VCSEL (Vertical-Cavity Surface-Emitting Laser) Introduction A VCSEL, or Vertical-Cavity Surface-Emitting Laser, is a type of semiconductor laser diode with laser beam emission perpendicular to the surface of the chip. Compared to edge-emitting lasers, VCSELs offer benefits such as easier testing, high reliability, and scalable manufacturing, making them ideal for a wide range of...