首页>
外国专利>
DISTRIBUTED FIBRE OPTIC SENSING SYSTEM AND METHOD BASED ON STIMULATED BRILLOUIN SCATTERING
DISTRIBUTED FIBRE OPTIC SENSING SYSTEM AND METHOD BASED ON STIMULATED BRILLOUIN SCATTERING
展开▼
机译:基于受激布里渊散射的分布式光纤光学传感系统和方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
The invention relates to a distributed fibre optic (3) sensing system and method based on stimulated Brillouin scattering, consisting in: separating the two signals forming the probe signal, and obtaining the difference between the stimulated amplification band (8) and attenuation band (9), or vice versa. This produces a signal of greater amplitude than with single-band detection. In this way, the signal-to-noise ratio (dynamic range) in the signal from the sensor is improved and the range is increased, while measurement uncertainty is reduced. In addition, the common noise present in the two bands of the probe signal is eliminated and, when a balanced detector is being used for detection, the saturation characteristics of the detector are improved, allowing much larger signal amplitudes to be obtained than are conventionally obtained.
展开▼