What are the two parts of an optical fiber sensor?

Optical fiber sensor consists of light source, optical fiber and optical detector. The working principle of optical fiber sensor is to send the light beam incident from the light source into the modulator through optical fiber, and the optical properties of light, such as light intensity, wavelength, frequency, phase and polarization state, will change in the modulator and become modulated light signals.

The measured parameters are sent to photoelectric devices through optical fibers and obtained after demodulation. In the whole process, the light beam is introduced through the optical fiber and emitted after passing through the modulator, in which the function of the optical fiber is firstly to transmit the light beam and secondly to play the role of the optical modulator.

Extended data

Features:

First, high sensitivity;

Secondly, the geometric shape has various adaptability and can be made into any optical fiber sensor;

Third, devices that sense various physical information (sound, magnetism, temperature, rotation, etc.). ) can be manufactured;

Fourth, it can be used in high voltage, electrical noise, high temperature, corrosion or other harsh environments;

Fifth, it has inherent compatibility with optical fiber telemetry technology.

The advantage of optical fiber sensor is that compared with traditional sensors, optical fiber sensor takes light as the carrier of sensitive information and optical fiber as the medium to transmit sensitive information, which has the characteristics of optical fiber and optical measurement and has a series of unique advantages. Good electrical insulation, strong anti-electromagnetic interference ability, non-invasion, high sensitivity, easy to realize remote monitoring of the measured signal, corrosion-resistant, explosion-proof, flexible optical path and easy to connect with the computer.