用亚阈值发光测量量子级联激光器的腔色散

IF 6.6 2区物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Nanophotonics Pub Date : 2025-08-01 DOI:10.1515/nanoph-2025-0078

Barbara Schneider, Jérôme Faist

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引用次数: 0

摘要

谐振腔色散的测量是表征激光频率梳的关键因素，因为它在预测多模激光动力学中起着重要的作用。在这项工作中，我们讨论了测量模态折射率色散的量子级联激光器通过分析其亚阈值发光测量的傅里叶变换光谱仪。特别地，我们证明了消位和零填充的效果。最后，我们选择了一些例子来说明不同的冷腔色散分布对激光器激光状态的影响。我们的研究结果为确定fabry - p量子级联激光器的腔色散提供了全面的指导，这对设计高性能频率梳至关重要。

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Measurement of the cavity dispersion in quantum cascade lasers using subthreshold luminescence

The measurement of the cavity dispersion is a key ingredient in the characterization of a laser frequency comb due to its fundamental role in predicting the multimode laser dynamics. In this work, we discuss the measurement of the modal refractive index dispersion in quantum cascade lasers obtained through the analysis of their sub-threshold luminescence measured using Fourier-transform spectrometers. In particular, we demonstrate the effects of apodization and zero-padding. Finally, we use selected examples to show the effects of different cold-cavity dispersion profiles on the lasing state of the laser. Our results provide a comprehensive guide for determining the cavity dispersion of Fabry–Pérot quantum cascade lasers, which is essential for designing high-performance frequency combs.

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来源期刊

Nanophotonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

13.50

自引率

6.70%

发文量

358

审稿时长

7 weeks

期刊介绍： Nanophotonics, published in collaboration with Sciencewise, is a prestigious journal that showcases recent international research results, notable advancements in the field, and innovative applications. It is regarded as one of the leading publications in the realm of nanophotonics and encompasses a range of article types including research articles, selectively invited reviews, letters, and perspectives. The journal specifically delves into the study of photon interaction with nano-structures, such as carbon nano-tubes, nano metal particles, nano crystals, semiconductor nano dots, photonic crystals, tissue, and DNA. It offers comprehensive coverage of the most up-to-date discoveries, making it an essential resource for physicists, engineers, and material scientists.