激光技术2016，Vol.40Issue(4)：610-614,5.DOI:10.7510/jgjs.issn.1001-3806.2016.04.032
外腔面发射激光器自发辐射谱的热特性
Thermal characteristics of spontaneous emission spectra from external-cavity surface-emitting lasers
摘要
Abstract
Thermal effect is the main reason limiting output power and beam quality of vertical-external-cavity surface-emitting lasers ( VECSELs) . To optimize the quantum design in active regions of gain chip, decrease thermal effect and upgrade slope efficiencies and output laser power, thermal characteristics of a VECSEL at 980nm wavelength were investigated experimentally by means of photoluminescence. The edge-emitting and surface-emitting spectra at different heatsink temperatures were obtained. The results indicate that the redshift rate of the edge-emitting spectra, which revels the intrinsic properties of quantum wells in active region, is 0. 5nm/K with increasing temperature, while the redshift rate of the surface-emitting spectra, which are modulated by multiple-layer structure of the gain chip, is only 0. 1nm/K with increasing temperature. The experiments also show that the surface-emitting spectra are split into several modes because of the restriction from the micro-cavities in gain chips of VECSELs. In the design of VECSEL gain chip, according to the above thermal characteristics of VECSELs, performance of a laser could be improved significantly by prebiasing emission wavelengths of quantum wells and cavity lengths of micro-cavities.关键词
激光器/外腔面发射激光器/光致荧光谱/热特性Key words
lasers/external-cavity surface-emitting laser/photoluminescence spectrum/thermal characteristic分类
信息技术与安全科学引用本文复制引用
詹小红,朱仁江,蒋茂华,胡平,崔玉亭,张鹏..外腔面发射激光器自发辐射谱的热特性[J].激光技术,2016,40(4):610-614,5.基金项目
重庆市教委科学技术研究基金资助项目(KJJ130630) （KJJ130630）
