High-performance distributed optical fiber sensing system and method
A technology of distributed optical fiber and sensing system, which is applied in the direction of using optical devices to transmit sensing components, etc., can solve problems such as difficulty in ensuring accurate pulse delay intervals, reducing system flexibility, and low performance, so as to increase the optical power entering the fiber, Avoid non-linear effects, reduce required effects
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Embodiment 1
[0048] Such as Figure 1 to Figure 3 As shown, a high-performance distributed optical fiber sensing system of the present invention includes: a multi-wavelength narrow-linewidth light source, a modulation unit, a splitter, a wavelength division multiplexer, a wavelength division multiplexer, a circulator, a transmission Sensing optical fiber, demodulation module and host computer, etc.;
[0049] The multi-wavelength narrow-linewidth light source emits continuous light comprising n wavelengths (the multi-wavelength narrow-linewidth light source simultaneously emits a wavelength of λ 1 , lambda 2 ,...,λ n continuous light), which is divided into two paths by the first splitter, one path is used as reference light, and the other path is used as signal light, which is asynchronously modulated at each wavelength by the modulation unit to be probe light;
[0050] The input end of the modulation unit is connected to the multi-wavelength narrow linewidth light source, and the outpu...
Embodiment 2
[0069] Such as Figure 1 to Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment provides a high-performance distributed optical fiber sensing method, which is applied to a high-performance distributed optical fiber sensing method described in Embodiment 1. sensing system; the method comprises the following steps:
[0070] S1. The multi-wavelength narrow-linewidth light source emits continuous light containing multiple wavelengths, which is divided into two paths by a splitter, one path is used as reference light, and the other path is used as signal light to asynchronously modulate each wavelength into probe light through the modulation unit;
[0071] S2. The detection light is divided into m-path detection light through the splitter, and the m-path detection light enters the m-path sensing fiber connected to the second port of the circulator through the first port of the circulator;
[0072] S3. Probe light propagates in the sen...
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