Improvement of the kink-free operation in ridge-waveguide laser diodes due to coupling of the optical field to the metal layers outside the ridge |
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Authors: | M Buda HH Tan L Fu L Josyula C Jagadish |
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Institution: | Dept. of Electron. Mater. Eng., Australian Nat. Univ., Canberra, ACT, Australia; |
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Abstract: | The kink-free output power in 980-nm emitting laser diodes can be increased by 30%-50% in ridge-waveguide devices when the thickness of the oxide is decreased such that the optical field is allowed to interact with the lossy Ti-PtAu metallization outside the ridge. This provides selective loss for the first-order lateral mode and delays the onset of the beam steering associated with kinks in the power output-current characteristic. The method is very simple and can be applied for any kind of ridge-waveguide semiconductor laser diode device. |
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