Continuous distribution type optical fiber gas detection device and method
A distributed optical fiber and gas detection technology, which is applied in measurement devices, color/spectral characteristic measurement, analysis of materials, etc. Industrialization implementation and other issues, to achieve the effect of fast and high-precision measurement requirements, high accuracy of results, and simple structure
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[0016] The technical solutions of the present invention will be described in detail below, but the protection scope of the present invention is not limited to the embodiments.
[0017] In order to better understand the technical content of the present invention, specific embodiments are given and described as follows in conjunction with the accompanying drawings.
[0018]First laser 101, first isolator 102, first coupler 103, polarization controller, acousto-optic modulator, first erbium-doped fiber amplifier, circulator, sensing fiber, second isolator, second erbium-doped fiber Amplifier, second laser, laser controller, lock-in amplifier, second coupler, photodetector, signal acquisition card, signal processing and display unit 117, the laser signal sent by the first laser enters the first coupler through the first isolator 103, the first coupler divides the laser signal into two beam signals, the first beam signal enters the second coupler 114 as a local oscillator signal, t...
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