DFB Laser based Electrical Dynamic Interrogation For Optical Fiber Sensors

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

Authors

Carvalho, JP (Author) Other; Frazao, O (Author) FCUP; Baptista, JM (Author) Other; Santos, JL (Author) FCUP; Barbero, AP (Author) Other

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

Scientific classification

FOS: Engineering and technology > Electrical engineering, Electronic engineering, Information engineering

Other information

Authenticus ID: P-002-G7P

DOI: 10.1117/12.922691

Abstract (EN): An electrical dynamic interrogation technique previously reported by the authors for long-period grating sensors is now progressed by relying its operation exclusively on the modulation of a DFB Laser. The analysis of the detected first and second harmonic generated by the electrical modulation of the DFB Laser allows generating an optical signal proportional to the LPG spectral shift and resilient to optical power fluctuations along the system. This concept permits attenuating the effect of the 1/f noise of the photodetection, amplification and processing electronics on the sensing head resolution. This technique is employed in a multiplexing sensing scheme that measures refractive index variations.

Language: English

Type (Professor's evaluation): Scientific