Marine temperature-salinity-depth sensing head based on hollow micro-cavity and manufacturing method thereof

Abstract

The invention discloses a marine temperature-salinity-depth sensing head based on a hollow micro-cavity and a manufacturing method thereof. The marine temperature-salinity-depth sensing head comprisesa tapered optical fiber (1), a hollow microsphere cavity (2), a hollow thin-wall micro-tube cavity (5), a hollow thick-wall micro-tube cavity (12) and a sensing head base body (14), wherein the tapered optical fiber (1) is provided with three tapered areas; the three conical areas are respectively and vertically contacted with one sides of the hollow microsphere cavity (2), the hollow thin-wall micro-tube cavity (5) and the hollow thick-wall micro-tube cavity (12); and the hollow microsphere cavity (2), the hollow thin-wall micro-tube cavity (5) and the hollow thick-wall micro-tube cavity (12) are fixed in the sensing head base body (14) to form a temperature sensing module, a salinity sensing module and a depth sensing module which are fixedly packaged in the sensing head base body (14).Compared with the prior art, based on the hollow micro-cavity echo wall resonant mode, by demodulating the movement of the central wavelength of the resonant peak in the three groups of transmissionspectrograms, the simultaneous detection of high-sensitivity ocean temperature, salinity and depth can be realized.

Description

technical field [0001] The invention belongs to the field of temperature, salinity and depth sensing of the resonant mode of a whispering gallery, and provides an ocean temperature, salt and depth sensing head and a manufacturing method thereof. Background technique [0002] Ocean temperature, salinity, and depth are important physical quantities of the ocean, which are of great significance to the research of marine organisms, aquaculture, and meteorology. Traditional electrical sensors are bulky and have problems such as short circuits caused by seawater intrusion, while optical fiber sensors have a simple structure and are resistant to electromagnetic interference. By modulating the characteristic parameters such as the intensity, wavelength, phase, and polarization state of the optical signal, high temperature and salinity measurements can be achieved. precision sensing. In 2005, Marrec et al. (L.Marrec, T.Bowgerette, et al., In-situ optical fiber sensors for temperatur...

AI Technical Summary

Problems solved by technology

However, the current optical fiber ocean temperature, salinity and depth sensor has low sensitivity and cannot realize simultaneous detection of temperature, salinity and pressure. Therefore, it is necessary to develop a new type of optical fiber ocean temperature, salt and depth sensor for simultaneous detection with high sensitivity.

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