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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 5 — Mar. 1, 2012
  • pp: 890–892

Spatial optical filter sensor based on hollow-core silica tube

Marta S. Ferreira, Kay Schuster, Jens Kobelke, José L. Santos, and Orlando Frazão  »View Author Affiliations


Optics Letters, Vol. 37, Issue 5, pp. 890-892 (2012)
http://dx.doi.org/10.1364/OL.37.000890


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Abstract

A spatial optical filter based on a hollow-core silica tube is proposed. Because of the hollow-core dimensions, it is possible to obtain a periodical spatial filter ranging from 1200 to 1700 nm with a channel spacing of 2.64 THz. The bandwidth is approximately 5.32 nm, and the isolation loss is 30dB. The optical losses are approximately 0.67dB/mm for a wavelength of 1500 nm. The 40 mm long spatial optical filter is tested as a sensing element and subjected to different physical parameters. The spatial optical filter is wavelength sensitive to strain and temperature, while for refractive-index variations there is an optical power dependency. This fiber structure can be used as a sensing element for extreme conditions, such as in very high temperature environments, where it presents a sensitivity of 27.5pm°C1.

© 2012 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: December 7, 2011
Revised Manuscript: January 20, 2012
Manuscript Accepted: January 25, 2012
Published: February 24, 2012

Citation
Marta S. Ferreira, Kay Schuster, Jens Kobelke, José L. Santos, and Orlando Frazão, "Spatial optical filter sensor based on hollow-core silica tube," Opt. Lett. 37, 890-892 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-5-890


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