论文信息 - Depressed index cladding graded barrier separate confinement single quantum well heterostructure laser

Depressed index cladding graded barrier separate confinement single quantum well heterostructure laser

In this letter, we present data for a novel depressed index cladding laser structure which provides reduced perpendicular far‐field divergence angle with acceptable low‐threshold current densities. Narrow perpendicular divergence angles of 27° full width at half maximum for a nearly perfect Gaussian beam shape have been measured, with a corresponding near‐field spot size of 1.30 μm. Threshold current densities of 309 A/cm2 are observed for 150 μm stripewidth, 780 μm long devices with 0.80 μm transverse spot sizes. Pulsed output powers for unmounted devices are greater than 0.9 W/uncoated facet.

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