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The performance of DFB and DBR ridge waveguide lasers operating at 980 nm is reported. The DBR devices used a single growth step and gave singlemode output powers as high as 30 mW. The DFB devices used a two-step growth process in which the lower cladding and active regions were grown first, the gratings were etched and then the upper cladding and p-contact layers were regrown on top of the grating. The DFB devices gave output powers as high as 75 mW.
Inspec keywords: distributed feedback lasers; integrated optics; laser transitions; optical waveguides; distributed Bragg reflector lasers; diffraction gratings; semiconductor growth; optical workshop techniques; laser modes; semiconductor lasers
Other keywords:
Subjects: Integrated optics; Design of specific laser systems; Lasing action in semiconductors; Gratings, echelles; Optical waveguides; Optical testing and workshop techniques; Optical waveguides and couplers; Integrated optics; Semiconductor lasers