N.I. Kalmykov, D. Kovalenko, I. Lobach, S. Kablukov
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Abstract
We report a study of the effect of spontaneous emission-induced noise in probe pulsed radiation on the reflectogram shape deformation in a distributed temperature sensor based on Raman scattering of light. Since the fraction of spontaneous emission in the used erbiumdoped amplifier can reach 50 % of the total power, this leads to deviations of reflectograms in the temperature sensor from the theoretical exponential dependence and, as a result, can yield a temperature measurement error of several degrees. Filtering the radiation with an amplitude modulator makes it possible to reduce these deviations. The influence of spontaneous emission on reflectograms is studied theoretically and experimentally.
期刊介绍：
Quantum Electronics covers the following principal headings
Letters
Lasers
Active Media
Interaction of Laser Radiation with Matter
Laser Plasma
Nonlinear Optical Phenomena
Nanotechnologies
Quantum Electronic Devices
Optical Processing of Information
Fiber and Integrated Optics
Laser Applications in Technology and Metrology, Biology and Medicine.
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