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为了获得高稳定性的偏振光,研制了氧化孔区域为70 mm×10 mm的非对称电流注入的矩形台面垂直腔面发射激光器(ACIR-VCSEL)。在室温下,注入连续直流电流,实验测试得到ACIR-VCSEL的斜率效率为0.483 W/A,微分串联电阻为23.5 W。在电流注入过程中,ACIR-VCSEL以稳定的平行于长边的偏振光输出,功率偏振比始终大于5。当电流为15 m A时,功率偏振比的最大值为14。在相同的测试条件下,氧化孔径大小同为70 mm×10 mm的环形电流注入矩形台面VCSEL(RCIR-VCSEL)的斜率效率为0.568 W/A,微分串联电阻为18.1 W,偏振功率比值最大值为9,最小值为2.6。RCIR-VCSEL与ACIR-VCSEL的输出特性相比,虽然RCIR-VCSEL比ACIR-VCSEL的斜率效率高,串联微分电阻小,但是ACIR-VCSEL的偏振稳定性和最大偏振比值比RCIR-VCSEL增强。
In order to obtain high-stability polarized light, a rectangular mesa vertical-cavity surface-emitting laser (ACIR-VCSEL) with an asymmetric current injection of 70 mm × 10 mm was developed. At room temperature, a continuous DC current was injected. The experimental results show that the slope efficiency of ACIR-VCSEL is 0.483 W / A and the differential series resistance is 23.5 W. During current injection, the ACIR-VCSEL is output with a stable, polarized light parallel to the long side, with power polarizations consistently greater than five. When the current is 15 m A, the maximum power polarization ratio is 14. Under the same test conditions, the slope efficiency of the ring current injection rectangular mesas VCSEL (RCIR-VCSEL) with the same aperture size of 70 mm × 10 mm is 0.568 W / A, the differential series resistance is 18.1 W, the maximum polarization power ratio Is 9, the minimum is 2.6. Although RCIR-VCSEL has a higher slope efficiency than ACIR-VCSEL and a series differential resistance, the polarization stability and maximum polarization ratio of the ACIR-VCSEL are enhanced over RCIR-VCSEL as compared to the output characteristics of the ACIR-VCSEL.