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arXiv · 2108.00782

Multi-color stimulated Raman scattering with a frame-to-frame wavelength-tunable fiber-based light source

Thomas Würthwein·Kristin Wallmeier·Maximilian Brinkmann·Tim Hellwig·Niklas M. Lüpken·Nick S. Lemberger·Carsten Fallnich
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Abstract

We present multi-color imaging by stimulated Raman scattering (SRS) enabled by an ultrafast fiber-based light source with integrated amplitude modulation and frame-to-frame wavelength tuning. With a relative intensity noise level of -153.7 dBc/Hz at 20.25 MHz the light source is well suited for SRS imaging and outperforms other fiber-based light source concepts for SRS imaging. The light source is tunable in under 5 ms per arbitrary wavelength step between 700 cm$^{-1}$ and 3200 cm$^{-1}$, which allows for addressing Raman resonances from the fingerprint to the CH-stretch region. Moreover, the compact and environmentally stable system is predestined for fast multi-color assessments of medical or rapidly evolving samples with high chemical specificity, paving the way for diagnostics and sensing outside of specialized laser laboratories.

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Thomas Würthwein, Kristin Wallmeier, Maximilian Brinkmann, Tim Hellwig, Niklas M. Lüpken, Nick S. Lemberger, Carsten Fallnich. 2021-08-02. Multi-color stimulated Raman scattering with a frame-to-frame wavelength-tunable fiber-based light source. https://arxiv.org/abs/2108.00782

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