High-precision temperature measurement method based on weakly measured dynamic range of pump light modulation
A dynamic range and temperature measurement technology, which is applied in the direction of measuring heat, physical/chemical change thermometers, thermometers, etc., can solve problems such as detection of noise at the receiving end, low extinction ratio of polarizers, and influence of noise systems, and achieve high-precision temperature The effect of improving measurement and temperature measurement accuracy
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[0046] Aiming at the defects in the prior art, the high-precision temperature measurement based on the weakly measured pump light modulation dynamic range is composed of a phase modulated by the pump light power and a wide range of phase modulators in the post-selection When the temperature range is large, the additional phase can be adjusted, so that the system can be precisely in the high-sensitivity linear working area, and the high-precision adjustable dynamic range can be realized. The temperature measurement; at the same time, the system has also carried out noise analysis, making the measurement results more accurate.
[0047] By improving the accuracy and range of the additional phase selected and introduced, the precise control of temperature measurement with large-scale dynamic changes is realized, and the influence of noise is analyzed in combination with experiments, so as to achieve high-precision temperature measurement. Such as figure 2 As shown, it specifical...
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