材料科学
极化(电化学)
光学
垂直腔面发射激光器
圆极化
激光器
光电子学
氧化物
物理
化学
微带线
物理化学
冶金
作者
Xin-Yu Xie,Jian Li,Xiaolang Qiu,Yongli Wang,Chuanchuan Li,Wei Xin
出处
期刊:Chinese Physics B
[IOP Publishing]
日期:2022-10-07
卷期号:32 (4): 044206-044206
被引量:1
标识
DOI:10.1088/1674-1056/ac9821
摘要
Vertical cavity surface emitting laser (VCSELs) as the ideal light source for rubidium (Rb) and cesium (Cs) atomic clocks is analyzed for its mode and polarization control. We fabricated three kinds of shapes: triangular, elliptic, and circular oxidation apertures which also have different sizes. We formed three different shape oxide apertures by wet-oxidation with 36 μm–39 μm circular mesa. Our results show that triangular oxidized-VCSEL has the advantages of mode and polarization selection over elliptic and circular oxide apertures. When triangular oxide-confined VCSELs emit in single mode, the measured side mode suppression ratio (SMSR) is larger than 20 dB and orthogonal polarization suppression ratio achieves 10 dB. Resonant blueshift of VCSELs with triangular and elliptic apertures is observed with the decrease of aperture size.
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