The performance of Raman-based distributed temperature sensors is strongly dependent on the receiver system employed since the signal carrying the temperature information has extremely low intensity. Therefore, a noisy receiver can easily generate noise levels that overlap the signal strength, unable to detect changes in this signal due to temperature variations. The present study will address a theoretical analysis based on the sensitivity of the signal of interest with temperature in order to characterize the receiver under performance requirements. The main contribution of this work is to introduce in the mathematical formalism for the first time, to the best of our knowledge, the term that considers the sensitivity of the signal employed to measure the temperature. This provides a more accurate way of determining how to improve the sensor’s accuracy, range, and resolution. Moreover, our analytical model allows us to relate the components specifications of the electronic circuit of the receiver to the detected signal magnitude and the desired performance of the sensor.

基于拉曼的分布式温度传感器的性能在很大程度上取决于所采用的接收器系统，因为携带温度信息的信号强度极低。因此，一个有噪声的接收器很容易产生与信号强度重叠的噪声电平，而无法检测到由于温度变化而引起的信号变化。本研究将针对基于感兴趣信号随温度变化的敏感性进行理论分析，以表征性能要求下的接收器。这项工作的主要贡献是，就我们所知，这是第一次将数学形式主义引入考虑测量温度信号的灵敏度的术语。这提供了确定如何提高传感器的精度，范围和分辨率的更准确的方法。此外，我们的分析模型使我们能够将接收器电子电路的组件规格与检测到的信号幅度和传感器的期望性能相关联。