VECSEL and MECSEL: high power, wavelength versatility and ultra-short pulses (Conference Presentation)
VECSEL and MECSEL: high power, wavelength versatility and ultra-short pulses (Conference Presentation)
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VECSEL 和 MECSEL：高功率、波长多功能性和超短脉冲（会议演示）
DOI：
10.1117/12.2291744
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
P. Michler
中科院分区：
文献类型：
--
作者：
R. Bek;H. Kahle;M. Jetter;P. Michler
半导体盘激光器，也称为垂直外腔面发射激光器（VECSEL），具有有利的特性，例如高输出功率、由于带隙工程的波长灵活性和近衍射限制的光束质量。可以插入腔内元件-滤波器、倍频晶体或半导体可饱和吸收镜（SESAM）-实现波长调谐、二次谐波产生或超短脉冲锁模。这些激光源的主要挑战是去除由光泵浦引入的热量。可以通过仅将有源区直接放置在两个散热器之间来改善热管理。这种膜外腔表面发射激光器（MECSEL）允许在更大的波长范围内发射，因为生长不受分布式布拉格反射器的限制。我们目前的制造，加工和表征的VECSEL和MECSEL使用不同的材料系统，在可见光和红外光谱范围内的各种波长的激光发射。我们的半导体结构通过金属有机气相外延生长，并且在有源区中包含量子威尔斯或量子点。我们讨论了我们的最新成果，包括薄膜激光器的概念与调查的应变效应的光致发光和激光发射，不同的泵浦方案和超短脉冲产生。
Semiconductor disk lasers, also called vertical external-cavity surface-emitting lasers (VECSELs) have advantageous properties such as high output power, wavelength flexibility due to bandgap engineering and near-diffraction limited beam quality. The possibility to insert intra-cavity elements – filters, frequency doubling crystals or semiconductor saturable absorber mirrors (SESAMs) – enables wavelength tuning, second harmonic generation or mode locking with ultra-short pulses. A major challenge for these laser sources is the removal of heat which is introduced by optical pumping. The thermal management can be improved by placing only the active region directly between two heat spreaders. This membrane external-cavity surface-emitting laser (MECSEL) allows emission in an even larger wavelength range, since the growth is not restricted by a distributed Bragg reflector. We present the fabrication, processing and characterization of VECSELs and MECSELs using different material systems for laser emission at various wavelengths in the visible and in the infrared spectral range. Our semiconductor structures are grown by metal-organic vapor-phase epitaxy and contain quantum wells or quantum dots in the active regions. We discuss our latest results including the membrane laser concept with investigations of strain effects on the photoluminescence and the laser emission, different pumping schemes and ultra-short pulse generation.