Wavelength detector of fiber grating sensor

Abstract

A wavelength detector of a fiber grating sensor comprises: at least one light input port, at least one wavelength modulation module, at least one data acquisition module, at least one data processing module and at least one data output port. Light, which needs to be detected and output by the fiber grating sensor, is incident from the light input port to the wavelength modulation module. The wavelength modulation module modulates the light with different wavelengths into light intensities which are corresponding to the different wavelengths and converts the light intensities into electric signals which are corresponding to the light intensities. The data acquisition module divides the electric signals into several parts, converts the several parts into the data signals and inputs the datasignals into the data processing module. The data processing module can acquire the wavelength values of the fiber grating sensor through reciprocals of the transmission functions of the signals. Measuring rate is high. Rate measurement range is wide. Wavelength resolution is high and wavelength measurement range is wide.

Description

technical field [0001] The invention relates to a detector of light wavelength, in particular to a wavelength detector of a fiber grating sensor. It is especially suitable for measuring the characteristics of fiber grating sensors (including single or multiple fiber grating sensors) at high speed and high resolution. Background technique [0002] Fiber Bragg grating is a new type of fiber optic passive device. Since its appearance in 1978, many scientific researchers and engineers in the world have devoted themselves to the development and application of fiber Bragg grating. Various technologies related to it have been greatly developed. In 1989, the mask-based ultraviolet writing technology was successfully researched, which made the mass production and industrial application of fiber gratings possible. Now, fiber gratings have been widely used in the fields of optical fiber communication and sensing. In the field of sensors, fiber grating sensors have (1) a sensing mech...

AI Technical Summary

Problems solved by technology

However, some of these instruments have high measurement resolution but slow speed, and some have high measurement speed but low resolution

Therefore, the current wavelength detector of the fiber grating sensor does not have the function of measuring the wavelength of the fiber grating sensor at the same time with high resolution and high speed

Moreover, the fiber grating wavelength demodulator in the prior art is basically designed for a sensor network of a certain scale, and generally can measure the wavelengths of dozens to hundreds of fiber grating sensors, so the structure is relatively complicated and the cost is relatively high. high

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