论文标题
通过低旋转半导体激光产生的斑点模式的实验研究
Experimental study of speckle patterns generated by low-coherence semiconductor laser light
论文作者
论文摘要
Speckle是一种波浪干扰现象，已在各种领域进行了研究，包括光学，流体动力学和声学。斑点图案包含干扰波的光谱信息，以及生成图案的散射介质的光谱信息。在这里，我们通过实验研究由两种类型的半导体激光器发出的光产生的斑点图案：常规的激光二极管，我们在其中通过光学反馈或泵电流调制以及耦合的纳米射击器诱导低耦合发射。在这两种情况下，我们分析了各个斑点模式的强度统计，以检查光的连贯性程度。我们表明，斑点分析提供了一种非光谱的方法来评估半导体激光光的相干性。
Speckle is a wave interference phenomenon that has been studied in various fields, including optics, hydrodynamics and acoustics. Speckle patterns contain spectral information of the interfering waves, and of the scattering medium that generates the pattern. Here we study experimentally the speckle patterns generated by the light emitted by two types of semiconductor lasers: conventional laser diodes, where we induce low-coherence emission by optical feedback or by pump current modulation, and coupled nanolasers. In both cases we analyze the intensity statistics of the respective speckle patterns to inspect the degree of coherence of the light. We show that that speckle analysis provides a non-spectral way to assess the coherence of semiconductor laser light.
