KJIT fiber optic sensor is a sensor that converts the state of the measured object into a measurable optical signal. The working principle of the fiber optic sensor is to send the incident light beam from the light source into the modulator through the optical fiber, and the interaction with the external measured parameters in the modulator changes the optical properties of the light, such as the intensity, wavelength, frequency, phase, polarization state, etc., to become a modulated optical signal, which is then sent to the optoelectronic device through the optical fiber and obtained after the demodulator. In the whole process, the light beam is introduced through the optical fiber, passes through the modulator and then emitted. The role of the optical fiber is first to transmit the light beam, and secondly to act as an optical modulator.
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