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Temperature-dependent transmittance of cascaded long-period fiber gratings for sensor applications

✍ Scribed by Hajime Sakata; Kotaro Honda

Publisher: John Wiley and Sons
Year: 2009
Tongue: English
Weight: 193 KB
Volume: 51
Category: Article
ISSN: 0895-2477
DOI: 10.1002/mop.24489

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✦ Synopsis

Abstract

We propose cascaded long‐period fiber gratings (LPFGs), whose synthesized rejection band alters in bandwidth and loss according to ambient temperature. By using an edge‐emitting light‐emitting diode as an input light source, temperature dependence of the optical power through the cascaded LPFGs exhibits either a positive or a negative temperature coefficient. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1809–1811, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24489

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## Abstract Long‐period gratings, which display sensitivity to ambient temperature variations, are proposed as sensors. Therefore, full temperature characterisation is essential. In this paper, the effects of temperature upon the spectral profiles of two sets of long period gratings (LPGs) of diffe