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Balanced Heterodyne Brillouin Spectroscopy Towards Tissue Characterization

We present the first application of balanced heterodyne detection, established in quantum optics, to Brillouin spectroscopy in biological tissues. The balanced detection cancels out a large part of the influence… Click to show full abstract

We present the first application of balanced heterodyne detection, established in quantum optics, to Brillouin spectroscopy in biological tissues. The balanced detection cancels out a large part of the influence of the laser noise. The center wavelength is 1064nm and the frequency resolution is 30MHz. The frequency resolution and the accessible frequency range are only limited by the measurement time and the laser tuning range (30GHz), respectively. In this way, we were able to measure the Brillouin shift in acetone, water, gummy bears, glass, and even porcine eye lenses.

Keywords: brillouin spectroscopy; balanced heterodyne; spectroscopy; heterodyne brillouin; spectroscopy towards; towards tissue

Journal Title: IEEE Access
Year Published: 2022

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