共查询到19条相似文献,搜索用时 250 毫秒
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径向桥电极高功率垂直腔面发射激光器 总被引:1,自引:0,他引:1
为改善高功率垂直腔面发射半导体激光器的热特性,提高它的输出功率,研制了新型径向桥电极高功率垂直腔面发射半导体激光器器件,对新型半导体激光器的结构模型进行理论分析表明,采用径向桥式电极可以降低器件P型DBR电阻,减小焦耳热;降低热阻,提高器件的散热能力。实验制备了出光孔径同为200μm的径向桥电极与常规电极的高功率垂直腔面发射半导体激光器,并对器件的性能进行了实验对比测试。结果表明径向桥电极高功率垂直腔面发射半导体激光器器件的微分电阻为0.43Ω;室温下最大输出功率可达340 mW,是常规电极垂直腔面发射半导体激光器的1.7倍;器件的热阻为0.095℃/mW,在80℃时,仍能正常激射,具有良好的热特性,径向桥电极高功率垂直腔面发射半导体激光器的光电特性与温度特性要远好于常规电极的高功率垂直腔面发射半导体激光器器件。 相似文献
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为实现对垂直腔面发射半导体激光器氧化孔径的精确控制,提高其光电特性,对湿法氧化工艺进行了实验研究.在不同的氧化温度下,对相同结构的垂直腔面发射半导体激光器模拟片进行湿法氧化.采用X射线能谱分析仪,对氧化后模拟片的氧化层按不同的氧化深度对其氧化生成物进行检测.依据氧化生成物中氧元素组分浓度的变化,对氧化过程进行了分析与讨论,推导出在一定的温度下,氧化速率随时间变化的一般规律.提出了在垂直腔面发射半导体激光器的湿法氧化工艺过程中,适当降低氧化温度,延长氧化时间,可减小氧化限制孔径的控制误差,提高氧化工艺的准确性与稳定性. 相似文献
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液晶与垂直腔面发射半导体激光器(VCSELs)阵列结合可实现波长可调谐、偏振精确控制等,同时液晶的引入也会改变垂直腔面发射半导体激光器阵列的热特性,本文设计了表面液晶-垂直腔面发射激光器阵列结构,并开展了阵列的热特性实验研究.对比分析了向列相液晶层对VCSEL阵列热特性的影响,实验结果表明,1×1,2×2,3×3三种表面液晶-VCSEL阵列的阈值电流温度变化率最高可降低23.6%,热阻降低26.75%;同时,激光器阵列各发光单元之间的温度均匀性显著提高,出光孔与周围温差小于0.5℃.综上所述,VCSEL阵列中液晶层的引入不仅大大加速激光器阵列单元热量扩散,而且降低了有源区结温,提高了VCSELs激光器阵列热特性,为实现高光束质量的单偏振波长可控VCSEL激光器阵列打下了良好的理论和实验基础. 相似文献
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垂直腔面发射激光器(VCSEL)中的载流子聚集效应使注入到有源区的工作电流只是通过边缘环形区域很窄的通道,激光功率密度分布不均匀;尤其当器件尺寸较大时,激射光斑呈现环状,环中间光强很弱.这是研制电抽运高功率大尺寸VCSEL尤为突出的技术难题.采用新型结构成功研制出808 nm波段高功率大孔径VCSEL,在注入电流为1A时,室温下连续输出功率达0.3 W.
关键词:
半导体激光器
垂直腔面发射激光器
高功率
大孔径 相似文献
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Thermal properties of vertical-cavity surface-emitting lasers (VCSELs) are studied using their comprehensive, three-dimensional,
self-consistent, thermal-electrical simulation. The thermal resistance versus operation current relation is found to be completely
different for two basic VCSEL configurations, i.e. for proton-implanted top-surface-emitting lasers (top-emitting VCSELs)
and etched-well lasers (bottom-emitting VCSELs). The above fact is explained using a concept of the average centre of heat
generation within a laser volume and its shift with an increase in an operation current.
This revised version was published online in November 2006 with corrections to the Cover Date. 相似文献
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K. Panajotov M. Sciamanna I. Gatare M. Arizaleta Arteaga H. Thienpont 《Opto-Electronics Review》2008,16(4):337-346
In this paper we summarize the recent results on nonlinear dynamics of vertical-cavity surface-emitting lasers (VCSELs) which
are bearing the fingerprints of the particular polarization properties of VCSELs. Due to the surface emission and cylindrical
symmetry, VCSELs lack strong polarization anisotropy and may undergo polarization switching and polarization mode-hopping.
This provides new specificities to the rich nonlinear dynamics induced in VCSELs by an external perturbation. We unveil both
experimentally and theoretically these new specificities for the case of optical feedback, optical injection, and unidirectional
synchronization between VCSELs. 相似文献
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Photonic crystal vertical cavity surface emitting lasers (PC VCSELs) are reviewed. The PC VCSEL shows single-transverse-mode continuous wave operation in the entire current range with side mode suppression ratio 35-40dB. A simple 3-D plane wave expansion method is found to be very effective in analyzing the modal properties of the PC VCSELs. 相似文献
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The polarization properties of vertical-cavity surface-emitting lasers (VCSELs) subject to optical feedback are studied experimentally. It is thereby demonstrated that polarization-selective optical feedback can be utilized to entirely eliminate VCSEL polarization switching over the entire device operating range. 相似文献
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M. Bardoux A. Bousseksou G. Tessier S. Bouchoule D. Fournier A. Salhi Y. Rouillard F. Genty 《Optics and Lasers in Engineering》2009,47(3-4):473-476
Thermal characterization of semiconductor lasers is an important issue for optoelectronics. This paper presents our thermoreflectance measurements on two different types of laser diodes: classical ridge laser diodes and vertical cavity surface emitting lasers (VCSELs). We first studied the external temperature increase in ridge diodes in order to determine inhomogeneity. Then, we tried to determine the inner temperature of the VCSELs. 相似文献
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We numerically investigate the effects of parameter mismatches on chaos synchronization in vertical-cavity surfaceemitting lasers (VCSELs). We assume injection-locked chaos synchronization in a unidirectionally coupled and openloop optical feedback system. The accuracy of chaos synchronization is greatly affected by the mismatches of the device parameters and operation conditions between the two lasers. In particular, the oscillation frequency of the laser is one of the important parameters in a system of injection-locked chaos synchronization. However, the variations of the device characteristics of VCSELs are very large compared with those of other types of semiconductor lasers. We study the effects of parameter mismatches related to the oscillation frequency of VCSELs on chaos synchronization. We proved that mismatches in terms of the birefringence and the injection current play crucial roles for the quality of chaos synchronization. 相似文献
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This paper reviews the progress on nano-aperture vertical-cavity surface-emitting lasers (VCSELs). The design, fabrication, and polarization control of nano-aperture VCSELs are reviewed. With the nanoaperture evolving from conventional circular and square aperture to unique C-shaped, H-shaped, I-shaped, and bowtie-shaped aperture, both the near-field intensity and near-field beam confinement from nanoaperture VCSELs are significantly improved. As a high-intensity compact light source with sub-100-nm spot size, nano-aperture VCSELs are promising to realize many new near-field optical systems and applications. 相似文献
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The feedback strength is a crucial parameter for feedback experiments using semiconductor lasers. In this article, the coupling efficiency of the field of vertical-cavity surface-emitting lasers (VCSELs) to external cavities containing one collimating lens has been analyzed in detail using ABCD-matrix methods. It is found that for a given set of parameters there are two distinct, experimentally realizable positions of the collimating lens which allow for optimal coupling, if the cavity length is sufficiently small. The predictions are verified in experiments using single-transverse-mode VCSELs. The obtained coupling efficiencies exceed 70%. 相似文献