Abstract

A single-longitude-mode, broad-stripe, gain-coupled, distributed-feedback laser based on periodic surface anode canals (PSACs) is demonstrated. The PSACs, produced by i-line lithography, enhance the contrast of periodic current density in the active layer without introducing effective photon coupling; calculated grating κL is only 0.026. Power of 144.6 mW at 968.8 nm, with spectrum linewidth less than 0.04 nm on every uncoated cleavage facet, is obtained at a current of 1.2 A with a side-mode suppression ratio >29dB.

© 2015 Optical Society of America

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