Title:
DISTRIBUTED BRILLOUIN SENSOR
Document Type and Number:
Japanese Patent JP2016121988
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a distributed Brillouin sensor system that allows temperature or strain sensing at a farther distance than existing Brillouin sensor systems.SOLUTION: A distributed Brillouin sensor system 1 comprises a pump laser 2, and a combined fiber assembly including at least a first optical fiber section 10 and a second optical fiber section 4. The pump laser 2 is arranged to send a pump signal into a first end of the combined fiber assembly, and the detection system is arranged to detect Brillouin backscattering from the combined fiber assembly. The combined fiber assembly is characterized by the first section 10 having a low Brillouin gain, and the second fiber section 4 having a high Brillouin gain.SELECTED DRAWING: Figure 1
Inventors:
GRUNER-NIELSEN LARS
PAUL CHRISTENSEN
TOMMY GEISLER
PAUL CHRISTENSEN
TOMMY GEISLER
Application Number:
JP2015215666A
Publication Date:
July 07, 2016
Filing Date:
November 02, 2015
Export Citation:
Assignee:
OFS FITEL LLC
International Classes:
G01D5/353; G01K11/32; G01L1/24; G02B6/02
Foreign References:
| US20120127459A1 | 2012-05-24 |
Other References:
YONGKANG DONG ET AL: "Extending the Sensing Range of Brillouin Optical Time-Domain Analysis Combining Frequency-Division M", JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. Vol.30 No.5,8, JPN6016048202, 15 April 2012 (2012-04-15), US, pages 1161 - 1167, ISSN: 0003460230
XIAOYI BAO ET AL: "Recent Progress in Brillouin Scatterin Based Fiber Sensors", SENSORS, vol. 11, no. 12, JPN6016048200, 7 December 2011 (2011-12-07), pages 4152 - 4187, XP055063132, ISSN: 0003460231, DOI: 10.3390/s110404152
XIAOYI BAO ET AL: "Recent Progress in Brillouin Scatterin Based Fiber Sensors", SENSORS, vol. 11, no. 12, JPN6016048200, 7 December 2011 (2011-12-07), pages 4152 - 4187, XP055063132, ISSN: 0003460231, DOI: 10.3390/s110404152
Attorney, Agent or Firm:
Okabe
Koji Yoshizawa
Haruhiko Mimura
Tomoki Kubota
Yoichi Okabe
Koji Yoshizawa
Haruhiko Mimura
Tomoki Kubota
Yoichi Okabe