Vertical-cavity surface-emitting lasers with periodic gain structure

The periodic gain structure is used as the active region of vertical-cavity surface-emitting lasers, which can enhance the effective coupling between gain regions and internal optical field. The high device performance is achieved. The maximum continuous-wave output power of large aperture device with active diameter up to 400 μm is as high as 1.41 W at room temperature. The low threshold current is only 0.5 A, which is lower than that of the conventional device with three quantum wells.