SingleMode VerticalCavity Surface Emitting Lasers for 87 RbBased ChipScale Atomic Clock

The results of numerical simulation and study of lasing characteristics of semiconductor vertical� cavity surfaceemitting lasers based on Al xGa 1- xAs alloys are presented. Lasers exhibit stable singlemode lasing at a wavelength of 795 nm at low operating currents ~1.5 mA and an output power of 350 μW, which offers prospects of their applications in nextgeneration chipscale atomic clocks.