中国物理B ›› 2018, Vol. 27 ›› Issue (7): 74210-074210.doi: 10.1088/1674-1056/27/7/074210
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
Lei Xiang(向磊), Xing Zhang(张星), Jian-Wei Zhang(张建伟), You-Wen Huang(黄佑文), Yong-Qiang Ning(宁永强), Li-Jun Wang(王立军)
Lei Xiang(向磊)1,2, Xing Zhang(张星)1, Jian-Wei Zhang(张建伟)1, You-Wen Huang(黄佑文)1,2, Yong-Qiang Ning(宁永强)1, Li-Jun Wang(王立军)1
摘要: We establish a novel method of controlling the transverse modes of vertical cavity surface emitting lasers (VCSELs) to achieve 1 mW single-fundamental-mode lasing. A dielectric mode filter is installed on top of the VCSEL. The dielectric layer (SiO2) is deposited and patterned to modify the mirror reflectivity across the oxide aperture via antiphase reflections. This mode selection is nondestructive and universally applicable for other structures under single transverse mode. Destructive etching techniques (dry/wet) or epitaxial regrowth are also not required. This method simplifies the preparation process and improves the repeatability of the device. Measurements show that under continuous-wave current injection, the side-mode suppression ratio exceeds 30 dB.
中图分类号: (Semiconductor lasers; laser diodes)