300 km-ultralong Raman fiber lasers using a distributed mirror for sensing applications

• Type: Article in International Scientific Journal
• Date: 2011

Authors

martins, h (Author) Other; marques, mb (Author) FCUP; frazao, o (Author) Other

Journal

Title: Optics Express

Vol. 19

Pages: 18149-18154

ISSN: 1094-4087

Publisher: Optical Society of America

Indexing

ISI Web of Knowledge - 21 Citations

Scopus - 28 Citations

Other information

Authenticus ID: P-002-MKM

DOI: 10.1364/oe.19.018149

Abstract (EN): Several configurations of ultralong Raman fiber lasers (URFL) based on a distributed mirror combined with Bragg gratings or fiber loop mirrors are studied. Two continuous-wave URFL configurations, with single and cascaded cavities using fiber Bragg gratings as mirrors are explored for a 300 km long fiber. For optical sensing, the cavity length was optimized for 250 km using one of the gratings an intensity sensor. Another URFL configuration based in a fiber loop mirror is also reported. For optical sensing using a 300 km long fiber it is shown that the best choice is a hybrid configuration. The sensitivity of the FBG laser sensor range was from (76 +/- 2) x 10(-6) mu epsilon(-1) (for lower strain) to (9.0 +/- 0.4) x 10 -6 mu epsilon(-1) (for higher strain). (C) 2011 Optical Society of America

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6