Reference-free low-coherence reflectometry under condition of low spectral selectivity of the detection system

E. A. Isaeva; A. A. Isaeva; D. A. Zimnyakov

doi:10.1117/12.2564336

9 April 2020 Reference-free low-coherence reflectometry under condition of low spectral selectivity of the detection system

E. A. Isaeva, A. A. Isaeva, D. A. Zimnyakov

Author Affiliations +

Proceedings Volume 11458, Saratov Fall Meeting 2019: Laser Physics, Photonic Technologies, and Molecular Modeling; 114580O (2020) https://doi.org/10.1117/12.2564336
Event: Saratov Fall Meeting 2019: VII International Symposium on Optics and Biophotonics, 2019, Saratov, Russian Federation

Abstract

The paper presents the results of investigation into the randomly inhomogeneous dye-doped media using the referencefree low-coherence reflectometry method under conditions of low spectral selectivity of the system for the detecting fluorescence radiation scattered by the medium. An increase in the width of the spectral window of the detector leads to substantial suppression of spatial fluctuations in fluorescence intensity excited by the probing laser beam. The optically thick layers of close-packed titanium dioxide nanoparticles saturated with an aqueous solution of rhodamine 6G were used as the media under investigation. It should be noted that the obtained dispersion dependence of the oscillation index of spatial intensity fluctuations on the central wavelength of spectrally selectable fluorescence radiation agrees with the previously received characteristic features of the fluorescence radiation transfer in the similar systems. These results demonstrate a possibility for using spectrometric systems with relatively low resolution (with the spectral window width of the order of 1 nm) to implement the method of reference-free low coherence reflectometry of the randomly inhomogeneous media.

Citation Download Citation

E. A. Isaeva, A. A. Isaeva, and D. A. Zimnyakov "Reference-free low-coherence reflectometry under condition of low spectral selectivity of the detection system", Proc. SPIE 11458, Saratov Fall Meeting 2019: Laser Physics, Photonic Technologies, and Molecular Modeling, 114580O (9 April 2020); https://doi.org/10.1117/12.2564336

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KEYWORDS

Luminescence

Absorption

Reflectometry

Scattering

Light scattering

Particles

Statistical analysis

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