A new SRS architecture for broadband sparse wavenumber analysis of environmental microfibers using the Hadamard transform (Conference Presentation)

Luca Genchi; Sergey P. Laptenok; Carlo Liberale

doi:10.1117/12.2650200

15 March 2023 A new SRS architecture for broadband sparse wavenumber analysis of environmental microfibers using the Hadamard transform (Conference Presentation)

Luca Genchi, Sergey P. Laptenok, Carlo Liberale

Author Affiliations +

Proceedings Volume PC12392, Advanced Chemical Microscopy for Life Science and Translational Medicine 2023; PC1239211 (2023) https://doi.org/10.1117/12.2650200
Event: SPIE BiOS, 2023, San Francisco, California, United States

Abstract

We propose a new broadband stimulated Raman scattering microscopy scheme. A high-efficient spectral compression method is used to frequency double a solid-state femtosecond laser oscillator and pump a picosecond optical parametric oscillator. The broadband femtosecond beam, used as Stokes beam, is intensity modulated by an electro-optical modulator, and spectrally filtered by a multichannel acousto-optic tunable filter. We implement Hadamard transform acquisitions by applying spectral masks on the broadband Stokes beam to perform compressive sensing for sparse wavenumber analysis to classify environmental micro-fibers, for fast discrimination of natural and synthetic origin materials.

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Citation Download Citation

Luca Genchi, Sergey P. Laptenok, and Carlo Liberale "A new SRS architecture for broadband sparse wavenumber analysis of environmental microfibers using the Hadamard transform (Conference Presentation)", Proc. SPIE PC12392, Advanced Chemical Microscopy for Life Science and Translational Medicine 2023, PC1239211 (15 March 2023); https://doi.org/10.1117/12.2650200

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KEYWORDS

Chemical analysis

Optical parametric oscillators

Femtosecond phenomena

Oscillators

Tunable filters

Raman scattering

Raman spectroscopy

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