Band-rejection fiber filter and fiber sensor based on a Bragg fiber of transversal resonant structure
2008 (English)In: Optics Express, ISSN 1094-4087, Vol. 16, no 21, 16489-16495 p.Article in journal (Refereed) Published
We propose a novel band-rejection fiber filter based on a Bragg fiber of transversal resonant structure, which can also be used as a fiber sensor. Defect layers are introduced in the periodic high/low index structure in the cladding of the Bragg fiber. Coupling between the core mode and the defect mode results in large confinement loss for some resonant wavelengths inside the band gap of the Bragg fiber. A segment of the Bragg fiber of transversal resonant structure can be used as a band-rejection fiber filter, whose characteristics are mainly determined by the defect layer. The loss peak wavelength of the Bragg fiber is dependent on the refractive index and the thickness of the defect layer which indicates its applications of refractive index and strain sensing.
Place, publisher, year, edition, pages
2008. Vol. 16, no 21, 16489-16495 p.
photonic-crystal fiber, gratings, guide
IdentifiersURN: urn:nbn:se:kth:diva-17965ISI: 000260864900023OAI: oai:DiVA.org:kth-17965DiVA: diva2:336010
QC 201005252010-08-052010-08-052013-11-19Bibliographically approved