SYSTEM FOR IMPROVING THE DYNAMIC RANGE AND REDUCING MEASUREMENT UNCERTAINTY IN FIBRE OPTIC DISTRIBUTED SENSORS AND FIBRE OPTIC DISTRIBUTED MEASUREMENT EQUIPMENT

摘要

Based on distributed amplification by the Raman effect, the system comprises one or more pump lasers (5) at various wavelengths, combined with a variable number of fibre optic reflectors (6). These elements induce in the fibre optic sensor (4) or measurement object the conditions necessary for the propagation of the signals of the sensor or the measurement equipment in virtual transparency mode, improving the signal-to-noise ratio in the signal of the sensor and measurement equipment, improving the dynamic range and increasing the range of the sensor or measurement equipment by up to 250 km.