Abstract
The study considers ridge waveguide characteristics in context of achieving maximum power and single-mode lasing. The watt-ampere and current-voltage characteristics, the spectrum, the radiation divergence along both axes depending on the pump current are measured, the dependences of the threshold current and differential efficiency vs the resonator length are plotted, the losses and the internal quantum yield are determined. Laser diodes with 2000 um resonator length showed the highest optical power – 190 mW at 375 mA pump current.
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