Laser-frequency locking techniques for high-sensitivity strain measurements by high-birefringence fiber Bragg gratings and resonators

Year: 2007

Authors: Salza M., Gagliardi G., Di Maio A., Ferraro P., De Natale P., Chehura E., Tatam R.

Autors Affiliation: CNR – Istituto Nazionale di Ottica Applicata, Via Campi Flegrei 34, 80078 Napoli, Italy;
Centre for Photonics and Optical Engineering, School of Engineering, Cranfield University, Bedford MK43 OAL, UK

Abstract: A new approach to simultaneously interrogate orthogonal axes of single Fiber-Bragg-Gratings (FBGs) and FBG-Fabry Perot resonator sensors fabricated in linearly highly birefiringent (HiBi) fibre is presented. Novel interrogation techniques of single Fiber-Bragg-Gratings (FBGs) and FBG-resonator sensors are presented. For a single FBG, we combined a laser-modulation technique to an electronic feedback loop that keeps the source always frequency locked to one peak of the sensor


Volume: 6619      Pages from: 661915-1  to: 661915-4

KeyWords: Fiber Bragg gratings; Pound-Drever-Hall method; laser-frequency modulation; high-birefringence fiber;
DOI: 10.1117/12.738379

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