摘要
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 stable polarization laser, asymmetrical current injection into rectangle-shape vertical cavity surface emitting laser （ACIR-VCSEL） with oxidation aperture dimension of 70 μm× 10 μm is studied and manufactured. Room temperature （RT） continuous-wave （CW） light-current-voltage characteristics of a VCSEL described above are tested. Slope efficiency is 0.483 W/A with differential series resistance of 23.5 Ω. The orthogonal polarization suppression ratio is more than 5 over the whole range of operating current. The maximum power polarization ratio is 14 at current of 15 mA. Ring current injection into rectangular VCSEL （RCIR-VCSEL） with the same oxidation aperture dimensions of ACIR-VCSEL is also studied as a comparison. In the same test conditions, the slope efficiency is 0.568 W/A with differential series resistance of 18.1 Ω. The minimum orthogonal polarization suppression ratio is more than 2.6 over the whole range of operating current and the maximum power polarization ratio is 9. For ACIR-VCSEL, although the slope efficiency is a little decrease and the differential series resistance increases, the maximum polarization ratio effectively increases and more stable polarization is achieved.
出处
《激光与光电子学进展》
CSCD
北大核心
2015年第7期144-148,共5页
Laser & Optoelectronics Progress
基金
国家自然科学基金(61234004,51172225,61204056,61376070,61474118,61176045,61204055)
吉林省科技厅项目(20140101172JC,20130206006GX)
江苏省自然科学基金(BK2012188)
关键词
激光器
垂直腔面发射激光器
非对称电流注入
偏振
矩形台面
lasers
vertical cavity surface emitting laser
asymmetric current injection
polarization
rectangle post
