Numerical Analysis of Remote Optical Fiber Sensors Systems with Raman Optical Amplification

Abstract

This work develops a continuous wave numerical model based on the spatial propagation of the pumps and signals into the optical fibre in a Raman amplification scheme that can be helpful to predict the behavior of different architectures in a remote optical fiber sensor system based on a long period grating. The numerical model is validated by experimental results and is applied in the analysis of the noise generated by Raman amplification in the remote optical sensors systems. After that, the numerical model is applied to analyze the most viable architecture to be implemented in an experimental measure in the temperature remote optical sensor with 50 km distance between the central unit and the sensor head. An electrical interrogation scheme is used due their low cost and good time response. The simulation results show 2,8 dB improvement in OSNR estimation for an optical amplification scheme using two optical fibers instead of only one for the same distance length.