Double-sideband distributed type optical fiber sensing system parameter measuring device

The invention discloses a double-sideband distributed type optical fiber sensing system parameter measuring device. The double-sideband distributed type optical fiber sensing system parameter measuring device comprises a distributed type optical fiber sensing system based on a Brilouin optical time domain analysis (BOTDA) technology, a light orthogonal frequency division multiplexing (OFDM) signal producing module, an OFDM detecting module and a signal processing module, wherein the distributed type optical fiber sensing system comprises a first laser device, a second laser device, a first optical coupler, a first electro-optic modulator, a second electro-optic modulator, a first amplifier, a second amplifier, a pulse/random sequence generator, a circulator and a single mode optical fiber which is taken as a sensing optical fiber, and the light OFDM signal producing module comprises an OFDM signal generator, a digital-analog conversion module and a drive module. The double-sideband distributed type optical fiber sensing system parameter measuring device can improve measuring time and measuring precision, expand a measured dynamic range, and improve the reliability and the real-time performance of the distributed type optical fiber sensing system, and is suitable for long distance distributed type optical fiber sensing system parameter measurement.