High-power coupled-multiple-stripe phase-locked injection laser

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Abstract
A semiconductor injection device consisting of 10 periodically spaced filaments coupled by curved waveguide sections has been demonstrated. This coupled‐multiple‐stripe (CMS) laser produces a phase‐locked TE polarized beam with a linear powerd–vs–pumping‐current characteristic up to 0.9 W/facet and a beam divergence of less than ≈4° along the p‐n junction plane in pulsed operation at room temperature. The threshold is 400 mA and differential quantum efficiencies of 65% are observed.