A Distributed Sensing System Based on Differential Amplification Technology
A technology of differential amplification and sensing system, which is applied in the direction of transmitting sensing components, measuring devices, instruments, etc. by using optical devices, which can solve the problem of non-adjustable range of data acquisition cards and achieve stable work
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[0013] The present invention will be further described below in conjunction with the accompanying drawings.
[0014] figure 1 It is a structural diagram of a distributed optical fiber sensing system based on differential amplification in the present invention. As shown in the figure, the system consists of two parts: an optical path and an electric circuit. The continuous light output by the adjustable distributed feedback laser 1 is divided into two paths after passing through the optical coupler 2, and one path is modulated by the acousto-optic modulator 3 (pulse signal is injected into the acousto-optic modulator) and then enters the erbium-doped fiber amplifier 4 for further processing. Amplified, then filtered by the optical filter 5, and then enters the optical fiber; the other routing light passes through the polarization controller 6, enters the electro-optic modulator 7, then enters the polarization scrambler 8 and optical isolator 9, and then enters the sensing optic...
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