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M. H. M. Reddy D. Feezell T. Asano D. A. Buell A. S. Huntington R. Koda L. A. Coldren 《Journal of Electronic Materials》2004,33(2):118-122
We demonstrate a thin, selectively lateral-etched, AlIn(Ga)As tunnel-junction (TJ) layer as a current and optical confinement
aperture in the InP-based long-wavelength vertical cavity surface-emitting lasers (VCSELs). A high etch selectivity was demonstrated
by etching the aperture a distance of several microns without affecting the surrounding InP etch-resistant layer. Edgeemitting
lasers enclosing the TJ aperture showed high injection efficiency and low current spreading underneath the aperature. Single-mode
continuous-wave operation of a 1.55-μm VCSEL was demonstrated successfully with a room-temperature differential efficiency
of 21% using a 6-μm-wide TJ aperature. 相似文献
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本文基于自旋反转模型,理论研究了椭圆偏振光注入下垂直腔面发射激光器(VCSELs)的偏振开关特性。研究结果表明:在X偏振模占主导的VCSELs中,采用椭圆偏振光注入时,随着注入偏转角度θ的增大,VCSELs发生偏振开关所需的最小注入系数(ηin min)值将呈现减小的趋势;当注入偏转角度θ值固定时,随着注入光与VCSELs中心频率之间的频率失谐量从负值变化到正值,ηin min值总体呈现出先减小后增大的趋势,而ηin min的极小值出现在了注入光的频率靠近VCSELs的Y偏振模频率的附近。因此,改变注入偏转角度及注入频率失谐量均可以实现对VCSELs的偏振开关的有效调控。 相似文献
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高功率底发射VCSELs的制作与特性研究 总被引:4,自引:4,他引:4
研究制作了大面积底发射氧化限制面发射激光器,并分析了器件特性.通过增加有源区面积,改进制作工艺,采用Al2O3作钝化膜和多层复合HfO2作增透膜等方法,提高了激光器输出功率.分析了最大输出功率与有源区直径和注入电流之间的依赖关系.结果表明:有源区直径分别为500μm和600μm的单管,室温下均达到连续输出功率1.95W,这也是目前国际上所实现的单管室温连续输出最高功率;实验所得最大输出功率与有源区直径和注入电流之间的依赖关系与理论计算所得结果一致.并特别讨论了直径200μm的器件的近场和远场光强分布,获得单横模工作. 相似文献
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CUI Jin-jiang NING Yong-qiang LI Te LIU Guang-yu ZHANG Yan PENG Biao SUN Yan-fang WANG Li-jun 《光机电信息》2007,24(12):36-40
Pulsed anodic oxidation technique, a new way of forming current blocking layers, was successfully used in ridge-waveguide QW laser fabrication. This method was applied in 980 nm VCSELs fabrication to form a high-quality native oxide current blocking layer, which simplifies the device process. A significant reduction of threshold current and a distinguished device performance are achieved. The 500 μm diameter device has a current threshold as low as 0.48 W. The maximum CW operation output power at room tempe... 相似文献