Low-threshold, single-transverse-mode, 940-nm vertical-cavity surface-emitting laser with a mode filter and half-wavelength cavity
Low-threshold, single-transverse-mode, 940-nm vertical-cavity surface-emitting laser with a mode filter and half-wavelength cavity
复制标题
具有模式滤波器和半波长腔的低阈值、单横模、940 nm 垂直腔表面发射激光器
DOI：
10.1070/qel17299
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发表时间：
2020-08
影响因子：
0.9
通讯作者：
S. Luo
中科院分区：
文献类型：
--
作者：
Q.H. Ren;J. Wang;M. Yang;H.J. Wang;Z. Cheng;Y.Q. Huang;X.M. Ren;H.M. Ji;S. Luo
Abstract. We demonstrate a structure for a vertical-cavity surface-emitting laser (VCSEL) with a mode filter and half-wavelength (λ/2) cavity. The effects of λ/2- and λ-cavities on the threshold current are studied. The thickness and etched diameter of the mode filter are optimised to achieve single-transverse-mode output. The results show that when changing from λ-cavity to λ/2-cavity, the threshold current of the VCSEL decreases by 30.7% (from 0.85 mA to 0.65 mA). In addition, for the mode-filter thickness of 80 nm, and the etched diameter of 2.5 μm, the side mode suppression ratio reaches 90 dB, which meets the requirement of single-transverse-mode output. The VCSELs with the optimised design can overcome many difficulties and have great potential in 3D face recognition.
DOI：
--
发表时间：
2012
期刊：
--
影响因子：
--
作者：
R. Michalzik
通讯作者：
R. Michalzik