High power surface-emitting distributed feedback laser
AssigneeSpectra-Physics Semiconductor Lasers, Inc.
InventorSteven Henry Macomber
Life of this patent
Estimating the term…
Abstract
A surface-emitting distributed feedback (SEDFB) laser is provided with a “fan-shaped” grating comprising a group of generally straight lines radiating from a central point that is away from the center of the gain. Such a grating provides better stability against self-induced filamentation and dynamic instabilities that limit achievable beam quality, especially in lasers having a stripe length greater than 1 mm.
Claims10
A surface emitting distributed feedback laser having a gain stripe region and a grating, the improvement wherein the grating comprises a series of lines radiating from a point located a substantial multiple of the gain stripe's longitudinal dimension away from the center of stripe gain.
A surface-emitting distributed feedback laser having a fan-shaped grating covering the gain stripe area of said laser, said grating comprising a group of generally straight lines fanning out from an apex located away from the center of the gain.
Dependencies are inferred from the claim text.