Abstract
Simple measures to improve the signal-to-noise ratio of optical frequency domain reflectometer (OFDR) readings are described. After applying a two-stage optical amplification of the backscattered signal, as well as eliminating the source of spurious reflections, it was possible to increase the signal-to-noise ratio of the frequency domain trace from 8 to 19 dB. This technique can be applied in fiber optic sensors and metrology of fiber optic and integrated optical elements.
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ACKNOWLEDGMENTS
We thank A.I. Krivosheev for fabrication of the passive circuit components and fruitful discussions.
Funding
Section 2 was supported by the Russian Foundation for Basic Research and the Perm Territory (project no. 19-48-590018 r_a, no. AAAA-A20-120031690047-9); Sections 3, 4, and 5 were completed within the framework of State Assignment no. AAAA-A19-119042590085-2.
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International conference “Optical Reflectometry, Metrology, & Sensing 2023,ˮ Russia, Perm, May 24–26, 2023.
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Belokrylov, M.E., Claude, D., Konstantinov, Y.A. et al. Method for Increasing the Signal-to-Noise Ratio of Rayleigh Back-Scattered Radiation Registered by a Frequency Domain Optical Reflectometer Using Two-Stage Erbium Amplification. Instrum Exp Tech 66, 761–768 (2023). https://doi.org/10.1134/S0020441223050172
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DOI: https://doi.org/10.1134/S0020441223050172