Remote optical fiber sensor based on a LPG sensor head with Raman amplification optimized by numerical methods

• Type: Article in International Conference Proceedings Book
• Date: 2012

Authors

Coelho, TVN (Author) Other; Carvalho, JP (Author) Other; Pontes, MJ (Author) Other; Santos, JL (Author) FCUP; Guerreiro, A (Author) FCUP

Conference proceedings International

Title: Proceedings of SPIE - The International Society for Optical Engineering

Optical Sensing and Detection II

Brussels, 16 April 2012 through 19 April 2012

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 1 Citation

Other information

Authenticus ID: P-008-45W

DOI: 10.1117/12.923002

Abstract (EN): In this work, we analyze a remote optical sensor system based on Raman amplification, composed by one Long Period Grating (LPG) as a sensor head, separated by 50 km from the optical source, and the interrogation unit composed by two Fiber Bragg Gratings (FBGs) modulated by two Piezoelectrics Transductors (PZTs). Optical fiber sensor systems are typically limited to operate at distances of only few kilometers due to the attenuation effects and noise present in the optical fiber that adversely affects the performance of the sensor interrogation process. We present experimental and simulated results obtained in the context of the analysis of remote optical fiber sensors. The simulation models compute the Raman interaction between the pumps and the sensor signals and allow speeding up the analyses regarding the setup to be experimentally implemented in order to measure/monitor environmental temperature. Experimental results obtained in the implemented setup show that under Raman amplification the power ratio between the two central wavelengths of the FBGs has a linear relation with the change of the LPG resonance induced by environmental temperature. © 2012 SPIE.

Language: English

Type (Professor's evaluation): Scientific