High-contrast Brillouin spectrometer based on a hybrid VIPA-etalon cascade scheme

Sophie Chagnon-Lessard; Ian Miller; John Hunter; Kevin Gourley; Hubert Jean-Ruel

doi:10.1117/12.3008831

12 March 2024 High-contrast Brillouin spectrometer based on a hybrid VIPA-etalon cascade scheme

Sophie Chagnon-Lessard, Ian Miller, John Hunter, Kevin Gourley, Hubert Jean-Ruel

Author Affiliations +

Proceedings Volume 12844, Optical Elastography and Tissue Biomechanics XI; 1284403 (2024) https://doi.org/10.1117/12.3008831
Event: SPIE BiOS, 2024, San Francisco, California, United States

Abstract

Brillouin spectroscopy is increasingly employed for biomedical research and recent advances such as line-scanning configurations further widen the scope of possible measurements. Current spectrometer technologies have limitations which are prohibitive for certain applications. We propose a novel hybrid VIPA-etalon cascade scheme compatible with both confocal and line-scanning geometries. A single VIPA is followed immediately with one or multiple essentially parallel-oriented standard Fabry-Perot etalons of approximately matching thickness. The cascaded etalons preserve near-unity throughput while increasing the contrast by more than 20 dB per stage. Other advantages include simplicity, compactness, and wavelength flexibility. We present simulations of the hybrid VIPA-etalon scheme and an experimental proof-of-concept measurement.

Conference Presentation

Citation Download Citation

Sophie Chagnon-Lessard, Ian Miller, John Hunter, Kevin Gourley, and Hubert Jean-Ruel "High-contrast Brillouin spectrometer based on a hybrid VIPA-etalon cascade scheme", Proc. SPIE 12844, Optical Elastography and Tissue Biomechanics XI, 1284403 (12 March 2024); https://doi.org/10.1117/12.3008831

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