Spectral vector beams for high-speed spectroscopic measurements

Lea Kopf, Juan R. Deop Ruano, Markus Hiekkamäki, Timo Stolt, Mikko J. Huttunen, Frédéric Bouchard, Robert Fickler

Research output: Contribution to journalArticleScientificpeer-review

11 Citations (Scopus)
3 Downloads (Pure)


Structuring light in multiple degrees of freedom has become a powerful approach to create complex states of light for fundamental studies and applications. Here, we investigate the light field of an ultrafast laser beam with a wavelengthdependent polarization state, which we terma spectral vector beam.We present a simple technique to generate and tune such structured beams and demonstrate their spectroscopic capabilities. By measuring only the polarization state using fast photodetectors, it is possible to track pulse-To-pulse changes in the frequency spectrum caused by, e.g., narrowband transmission or absorption. In our experiments,we reach readout rates of around 6 MHz, which is limited by our technical ability to modulate the spectrum and can in principle reach GHz readout rates. In simulations we extend the spectral range to more than 1000 nm by using a supercontinuum light source, thereby paving the way to various applications requiring high-speed spectroscopic measurements.

Original languageEnglish
Pages (from-to)930-935
Number of pages6
Issue number6
Publication statusPublished - 2021
Publication typeA1 Journal article-refereed

Publication forum classification

  • Publication forum level 2

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics


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