Frequency-modulated comb in a VECSEL
Abstract
Optical frequency combs based on mode-locked lasers have revolutionized many areas of science and technology, such as precision metrology, optical frequency synthesis or telecommunications. In recent years, a particular kind of frequency comb has been observed in edge-emitting semiconductor lasers where the phase difference between longitudinal laser modes is fixed but not zero. This results in a linearly chirped output in the time domain with nearly constant intensity. Here, by using coherent beatnote spectroscopy, we show that such a comb regime can also exist in vertical-external-cavity surface-emitting lasers (VECSELs), as evidenced for a specific part of the laser spectrum. Our findings may not only lead to a better understanding of the physics of frequency-modulated combs but also enable comb applications with high optical power per comb line and flexible emission wavelengths.
Cite
@article{arxiv.2012.10383,
title = {Frequency-modulated comb in a VECSEL},
author = {Christian Kriso and Avijit Barua and Obaid Mohiuddin and Christoph Möller and Antje Ruiz-Perez and Wolfgang Stolz and Martin Koch and Arash Rahimi-Iman},
journal= {arXiv preprint arXiv:2012.10383},
year = {2020}
}