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17 March 2023 Sensing with WGM microlasers and high sensitivity 2D dispersion spectrometer
Xuewen Zhou, Giuliano Scarcelli
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Proceedings Volume PC12407, Laser Resonators, Microresonators, and Beam Control XXV; PC1240708 (2023) https://doi.org/10.1117/12.2648389
Event: SPIE LASE, 2023, San Francisco, California, United States
Abstract
We have developed a sensing platform with WGM microlasers and a 2D-dispersion spectrometer. The 2D dispersion is provided by a diffraction grating element in x-axis and a virtual image phase array (VIPA) etalon in y-axis. With a spectral resolution of less than 0.4 pm, the 2D-dispersion spectrometer can detect slight changes of the lasing mode of the microlaser. To demonstrate, we used a polystyrene microsphere as the microlaser and detected the (1) change in refractive index and (2) change in absorption of the medium surrounding the microsphere.
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Xuewen Zhou and Giuliano Scarcelli "Sensing with WGM microlasers and high sensitivity 2D dispersion spectrometer", Proc. SPIE PC12407, Laser Resonators, Microresonators, and Beam Control XXV, PC1240708 (17 March 2023); https://doi.org/10.1117/12.2648389
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KEYWORDS
Spectroscopy
Dispersion
Signal detection
Spectral resolution
Fabry–Perot interferometers
Imaging arrays
Optical microcavities
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