High power GaSb-based distributed feedback laser with laterally coupled dielectric gratings at 1.95μm
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arXiv
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| Autores principales: | , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866917718155853824 |
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| author | Ding, Zhengqing Cao, Juntian Zhan, Kun Chen, Yihang Zhou, Lidan Tan, Hao Yang, Chenao Yu, Ying Niu, Zhichuan Yu, Siyuan |
| author_facet | Ding, Zhengqing Cao, Juntian Zhan, Kun Chen, Yihang Zhou, Lidan Tan, Hao Yang, Chenao Yu, Ying Niu, Zhichuan Yu, Siyuan |
| contents | Traditional Distributed Feedback (DFB) or Distributed Bragg Reflector (DBR) lasers typically utilize buried gratings as frequency-selective optical feedback mechanisms. However, the fabrication of such gratings often necessitates regrowth processes, which can pose technical challenges for materials platforms such as GaAs and GaSb. Metal gratings were also used for GaSb lasers but they introduce additional absorption loss that limits device efficiency and output power. In this paper, we introduce a novel laterally coupled dielectric Bragg grating structure, which enables highly controllable, deterministic, and stable coupling between the grating and the optical mode. Our device demonstrates a continuous-wave output power of 47.02 mW at room temperature, exhibiting stable single-mode operation from 300-1000 mA and achieving a maximum side mode suppression ratio of 46.7 dB. These results underscore the innovative lateral coupled dielectric grating as a feasible and technologically superior approach for fabricating DFB and DBR lasers, which hold universal applicability across different material platforms and wavelength bands. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_07690 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High power GaSb-based distributed feedback laser with laterally coupled dielectric gratings at 1.95μm Ding, Zhengqing Cao, Juntian Zhan, Kun Chen, Yihang Zhou, Lidan Tan, Hao Yang, Chenao Yu, Ying Niu, Zhichuan Yu, Siyuan Optics Applied Physics 78A60 J.2.6 Traditional Distributed Feedback (DFB) or Distributed Bragg Reflector (DBR) lasers typically utilize buried gratings as frequency-selective optical feedback mechanisms. However, the fabrication of such gratings often necessitates regrowth processes, which can pose technical challenges for materials platforms such as GaAs and GaSb. Metal gratings were also used for GaSb lasers but they introduce additional absorption loss that limits device efficiency and output power. In this paper, we introduce a novel laterally coupled dielectric Bragg grating structure, which enables highly controllable, deterministic, and stable coupling between the grating and the optical mode. Our device demonstrates a continuous-wave output power of 47.02 mW at room temperature, exhibiting stable single-mode operation from 300-1000 mA and achieving a maximum side mode suppression ratio of 46.7 dB. These results underscore the innovative lateral coupled dielectric grating as a feasible and technologically superior approach for fabricating DFB and DBR lasers, which hold universal applicability across different material platforms and wavelength bands. |
| title | High power GaSb-based distributed feedback laser with laterally coupled dielectric gratings at 1.95μm |
| topic | Optics Applied Physics 78A60 J.2.6 |
| url | https://arxiv.org/abs/2407.07690 |