A simple background elimination method for miniaturized fiber-optic Raman probe

Bohong Zhang; Jie Huang

doi:10.1117/12.2618893

13 June 2022 A simple background elimination method for miniaturized fiber-optic Raman probe

Bohong Zhang, Jie Huang

Proceedings Volume PC12105, Fiber Optic Sensors and Applications XVIII; (2022) https://doi.org/10.1117/12.2618893
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States

Abstract

A miniaturized fiber-optic Raman probe for Raman spectroscopy, which can eliminate the high backscattering Raman signal from the long-fused silica fiber that is used for the biochemical application, is presented. Its main purpose is to provide a technique for the detection of very small substances and separate Raman backscattering signal of optical fiber. After a brief introduction of the traditional fiber Raman technology, the experimental operation of the design optimization of the miniaturized fiber-optic Raman probe was discussed. We successfully used the home build fiber taper device to combine seven multi-mode fibers as one fiber taper with approximately 30µm as the probe diameter for Raman spectral analysis. By comparing the traditional fiber-optic Raman sensor and the miniaturized fiber-optic Raman probe with experiments on a variety of materials, the correlation of the Raman signal has been demonstrated. We observed that the miniaturized fiber-optic Raman probe not only effectively removes the backscattering Raman signal of the fiber itself, but also provides a comparable signal-noise ratio, which provides an argument for this research.

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Bohong Zhang and Jie Huang "A simple background elimination method for miniaturized fiber-optic Raman probe", Proc. SPIE PC12105, Fiber Optic Sensors and Applications XVIII, (13 June 2022); https://doi.org/10.1117/12.2618893

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KEYWORDS

Raman spectroscopy

Fiber optics

Backscatter

Fiber optics sensors

Optical fibers

Multimode fibers

Sensors

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