Miniature low-frequency Raman spectrometer based on fiber Bragg grating filters and cross-dispersed gratings

Sophie Chagnon-Lessard; Hubert Jean-Ruel

doi:10.1117/12.3009482

13 March 2024 Miniature low-frequency Raman spectrometer based on fiber Bragg grating filters and cross-dispersed gratings

Sophie Chagnon-Lessard, Hubert Jean-Ruel

Author Affiliations +

Proceedings Volume PC12839, Biomedical Vibrational Spectroscopy 2024: Advances in Research and Industry; PC128390C (2024) https://doi.org/10.1117/12.3009482
Event: SPIE BiOS, 2024, San Francisco, California, United States

Abstract

Low frequency Raman spectroscopy finds various applications in pharmaceutical and biomedical research. Simple systems consisting of ultra-narrow volume holographic grating filters combined with a single-stage spectrometer are now available and suitable for a large range of measurements. Nevertheless, complex multi-stage spectrometers still achieve superior performances in terms of contrast and usable spectral range, remaining advantageous for certain samples. We propose a novel low frequency Raman spectrometer scheme which combines the simplicity, compactness, and cost of volume holographic grating-based systems with performances comparable to large multi-stage spectrometers in the range of interest. It consists of a cross-dispersed grating spectrometer combined with serialized fiber Bragg grating filters. We present simulations, proof-of-concept measurements, and discuss considerations for potential deployments outside research laboratories.

Conference Presentation

Citation Download Citation

Sophie Chagnon-Lessard and Hubert Jean-Ruel "Miniature low-frequency Raman spectrometer based on fiber Bragg grating filters and cross-dispersed gratings", Proc. SPIE PC12839, Biomedical Vibrational Spectroscopy 2024: Advances in Research and Industry, PC128390C (13 March 2024); https://doi.org/10.1117/12.3009482

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