Transverse mode control by using temperature-profile control in VCSELs with a large active area of more than 10 µm diameter is demonstrated. From spectrum measurement, higher-order mode suppression was observed as power increased for a heater introduced for temperature-profile control. The far-field pattern without heating had two peaks and it changed to a Gaussian shape with heating.
Inspec keywords: heating; surface emitting lasers; temperature control
Other keywords:
Subjects: Lasing action in semiconductors; Laser resonators and cavities; Laser resonators and cavities; Semiconductor lasers
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