Radio-Frequency Self-Referencing Technique With Enhanced Sensitivity for Coarse WDM Fiber Optic Intensity Sensors

• Type: Article in International Scientific Journal
• Date: 2009

Authors

Julio Montalvo (Author) Other; Orlando Frazao (Author) Other; Jose Luis Santos (Author) FCUP; Carmen Vazquez (Author) Other; Jose Manuel Baptista (Author) Other

Journal

Title: Journal of Lightwave Technology

Vol. 27

Pages: 475-482

ISSN: 0733-8724

Publisher: Optical Society of America

Indexing

ISI Web of Knowledge - 18 Citations

Scopus - 23 Citations

Scientific classification

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

Other information

Authenticus ID: P-003-MXB

DOI: 10.1109/jlt.2008.2004949

Abstract (EN): A self-referenced passive optical network (PON) with coarse wavelength division multiplexing (CWDM) is reported for remotely addressing optical intensity sensors with enhanced sensitivity. The self-referencing remote configuration is described as a finite-impulse-response (FIR) filter in reflective operation using two fiber Bragg gratings (FBG) and a fiber delay line. The antisymmetrical phase response of the configuration permits to achieve a self-referencing measurement parameter two times more sensitive than reported previously. To enhance the power budget of the network, CWDM devices with low insertion losses are used for spectral splitting of a radio-frequency (RF) modulated broadband light source (BLS). The network topology and the sensor's interrogation technique are theoretically analyzed and experimental results validating the models are reported.

Language: English

Type (Professor's evaluation): Scientific