Spectrally selective fundamental core mode suppression in optical fibre containing absorbing rods

The feasibility of making a wavelength-selective fibre filter using fibre with absorbing rods in its silica cladding has been demonstrated theoretically for the first time. The technique described in this paper is of great practical interest for designing fibre lasers and amplifiers emitting at wave...

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Bibliographic Details
Published inQuantum electronics (Woodbury, N.Y.) Vol. 50; no. 12; pp. 1083 - 1087
Main Authors Aleshkina, S.S., Kashaykina, T.A., Yashkov, M.V., Salganskii, M.Yu, Alyshev, S.V., Bubnov, M.M., Guryanov, A.N., Likhachev, M.E.
Format Journal Article
LanguageEnglish
Published Bristol Kvantovaya Elektronika, Turpion Ltd and IOP Publishing 01.12.2020
IOP Publishing
Subjects
AMPLIFIERS
CLADDING
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Fiber lasers
fibre containing absorbing rods
LASERS
MATERIALS SCIENCE
OPTICAL FIBERS
optical fibre
RAMAN EFFECT
Raman spectra
resonance mode coupling
Rods
SILICA
Silicon dioxide
wavelength-selective filter
WAVELENGTHS
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Summary:The feasibility of making a wavelength-selective fibre filter using fibre with absorbing rods in its silica cladding has been demonstrated theoretically for the first time. The technique described in this paper is of great practical interest for designing fibre lasers and amplifiers emitting at wavelengths where lasing is impeded by the presence of more energetically favourable radiative transitions in the active medium. In addition, the approach proposed here can be used for stimulated Raman scattering suppression. The unique feature of the fundamental core mode suppression mechanism examined is that there is a (bending) controlled spectral width of a region where excess losses are produced.
ISSN:1063-7818
1468-4799
DOI:10.1070/QEL17460