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中文摘要：
为了获得高功率的偏振激光,对矩形结构的980 nm大口径顶发射垂直腔面发射激光器（VCSEL）进行了研究。实验结果显示,对于400μm×80μm出光口径的矩形VCSEL器件,在工作电流内,水平偏振光和竖直偏振光共同存在,并且水平偏振光一直占据主导地位;而且水平偏振光的光谱相对于竖直偏振光有蓝移。这些现象和理论模型的分析结果非常吻合,证明矩形结构能很好的稳定大口径VCSEL的偏振方向。最后测得矩形VCSEL在水平方向和竖直方向的远场发散角分别为6.9°和10.2°。
英文摘要：
Polarization characteristics of 980 nm large-aperture top-emitting vertical-cavity surface-emitting lasers（VCSEL） with rectangular post were investigated for achieving high-power polarized laser.The experimental results showed that,for the rectangular-shaped VCSEL with 400 μm×80 μm output aperture,both H-polarization（horizontal） and V-polarization（vertical） coexisted in the entire range of operation current,and H-polarization always dominated over V-polarization.Blue-shift of H-polarization light occurred with respect to V-polarization.The experimental results for power and spectrum polarization are consistent with the theoretical calculation.It was proved that the polarization direction of large-aperture VCSEL can be preferably stabilized by the rectangular structure.The horizontal and vertical beam divergences were 6.9° and 10.2° in the rectangular-shaped VCSEL,respectively.
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