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We have fabricated continuous-wave GaInAsSb-AlGaAsSb distributed-feedback (DFB) lasers in the 2.8- mum range, using a DFB concept requiring no subsequent overgrowth steps, by defining first-order Cr-Bragg gratings laterally to a ridge waveguide. We have simulated the confinement factor GammaCr of the optical mode and the Cr-grating for various ridge widths and investigated the effect on laser properties...
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