Chaotic laser related Brillouin optical time domain analyzer integrated with optical fiber Raman amplifier

Abstract

The invention discloses a chaotic laser related Brillouin optical time domain analyzer integrated with an optical fiber Raman amplifier. The analyzer is manufactured by using a chaotic laser related principle, an optical fiber stimulated Raman scattered light amplification effect, the strain of coherently amplified Brillouin scattered light, a temperature effect and an optical time domain reflection principle. Through related processing of back detection light and local reference light of a sensing optical fiber, the spatial resolution of a sensor system is improved; a continuously-running high-power optical fiber Raman laser is used as a pump light source of the Brillouin optical time domain analyzer to overcome the difficulty that the frequencies of a detection laser and a pump laser are required to be strictly locked by an optical fiber Brillouin optical time domain analyzer; and a broadband optical fiber Raman amplifier replaces a narrow-band optical fiber Brillouin amplifier, so the gain of back coherently amplified stimulated Brillouin scattered light is increased, the signal-to-noise ratio of the sensor system is improved, and correspondingly, the measuring length and the measuring accuracy of a sensor are improved.

Description

technical field [0001] The invention belongs to the technical field of distributed optical fiber sensors, in particular to a Brillouin optical time-domain analyzer for chaotic laser-related integrated optical fiber Raman amplifiers. Background technique [0002] In the field of optical fiber Brillouin optical time domain analyzer, in order to improve the spatial resolution of the sensor, a narrow pulse light source is used, but due to the nonlinear effect of the optical fiber, the incident power of the optical fiber is limited. Therefore, it is necessary to achieve long distance and high spatial resolution. The fiber Brillouin optical time domain analyzer with high efficiency is very difficult. The traditional method of compressing laser pulse width and the method of double pulse pair are difficult to achieve the effect of long-distance spatial resolution less than 1 meter, and the spatial resolution is related to the measurement length. , the signal-to-noise ratio of the sy...

AI Technical Summary

Problems solved by technology

[0002] In the field of optical fiber Brillouin optical time domain analyzer, in order to improve the spatial resolution of the sensor, a narrow pulse light source is used, but due to the nonlinear effect of the optical fiber, the incident power of the optical fiber is limited. Therefore, it is necessary to achieve long distance and high spatial resolution. The fiber Brillouin optical time domain analyzer with high efficiency is very difficult. The traditional method of compressing laser pulse width and the method of double pulse pair are difficult to achieve the effect of long-distance spatial resolution less than 1 meter, and the spatial resolution is related to the measurement length. , the signal-to-noise ratio of the system is also low

Images