Highly directional surface radiation for surface emitting distributed feedback lasers

Kun Tian; Yonggang Zou; Rui Wang; Ruidong Li; Hui Tang

doi:10.1117/12.2638775

29 April 2022 Highly directional surface radiation for surface emitting distributed feedback lasers

Kun Tian, Yonggang Zou, Rui Wang, Ruidong Li, Hui Tang

Proceedings Volume 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022); 122550K (2022) https://doi.org/10.1117/12.2638775
Event: 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 2022, Chongqing, China

Abstract

Improving the directionality of surface radiation is an important issue to increase the output power and the differential quantum efficiency of grating-coupled surface-emitting distributed feedback lasers. We proposed a method to realize the high directionality of surface radiation. Surface second-order gratings are fabricated on the p-side of the epitaxial wafer to provide feedback and surface radiation. High contrast gratings arranged above the surface grating are used to reflect the upward-diffracted light. The adjustment of the thickness of the intermediate layer between the grating and the reflector can be used to phase the reflected light with the downward-diffracted light. The calculation results show that the directionality of this structure can reach 92.5% which meets the device requirements. This design provides a reference for surface-emitting DFB lasers with high performance.

Citation Download Citation

Kun Tian, Yonggang Zou, Rui Wang, Ruidong Li, and Hui Tang "Highly directional surface radiation for surface emitting distributed feedback lasers", Proc. SPIE 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 122550K (29 April 2022); https://doi.org/10.1117/12.2638775

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