Double-fiber end face interference salinity detection method based on 5G microwave photon signal

Abstract

The invention provides a double-fiber end face interference salinity detection method based on a 5G microwave photon signal, which comprises the following steps: acquiring a wireless signal from the air, performing electro-optical modulation on the wireless signal to obtain an input optical signal, outputting the input optical signal to a first port of an optical circulator, and outputting the input optical signal to a second port of the optical circulator; the optical circulator outputs an input optical signal to the salinity sensor through the second port, and at least one part of the salinity sensor is soaked in seawater to be detected; a return optical signal output by the salinity sensor is input from a second port of the optical circulator and then is output to the photoelectric detector through a third port of the optical circulator, the photoelectric detector performs photoelectric conversion on the return optical signal to obtain a measurement electric signal, and the measurement electric signal is output to the electronic spectrum analyzer; and analyzing the frequency of the measurement electric signal by electronic spectrum analysis, and calculating the salinity of the seawater to be detected according to the analysis result of the spectrum. According to the invention, the seawater salinity can be conveniently detected.

Description

technical field [0001] The invention relates to the field of salinity detection of seawater, in particular to a method for detecting salinity by dual-fiber end face interference based on 5G microwave photon signals. Background technique [0002] The salinity of seawater in different regions is often different, and the change of seawater salinity often has a major impact on marine ecology. Therefore, it is necessary to monitor the salinity of seawater, for example, it is necessary to regularly detect the salinity of seawater in some specific areas. Existing systems (SDS) for detecting seawater salinity are often provided with a device for detecting seawater salinity. [0003] see figure 1 , The existing seawater salinity detection device includes an erbium-doped fiber amplifier 11, an electro-optic modulator 12, a salinity sensor 13, an optical circulator 14, a photoelectric converter 15 and an electronic spectrum analyzer 16. The erbium-doped fiber amplifier 11 outputs opt...

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Problems solved by technology

[0005] However, because the erbium-doped optical fiber amplifier 11 is expensive and has a large volume, the existing devices for detecting seawater salinity have high production costs, and it is inconvenient to carry out seawater salinity detection outdoors due to the large volume, which often needs to be treated. Obtain a certain amount of seawater in the detection sea area and perform salinity detection in the laboratory, resulting in low efficiency of seawater salinity detection, and it is impossible to perform outdoor detection anytime and anywhere, and the convenience of seawater salinity detection is not high

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