Abstract

Hybrid-cavity semiconductor lasers consisting of a Fabry–Perot (FP) cavity with one side connected to a scissor-shaped microcavity are proposed and demonstrated to achieve lasing mode control. Single-mode lasing and dual-mode lasing can be achieved for the laser by adjusting the scissor-cavity and the FP-cavity injection currents. Dual-mode operation is experimentally verified with a mode interval varied from 8.06 to 11.01 nm by varying the scissor-cavity current, and agrees well with the mode simulation by the finite element method, for a laser with the FP cavity length of 300 µm and the scissor microcavity of two deformed rings with radii of 15 and 8 µm. In addition, single-mode lasing with a side-mode suppression ratio of 27 dB is achieved with a wavelength tuning from 1554.98 to 1559.84 nm by varying the scissor-cavity current.

© 2019 Optical Society of America

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