Spectrally selective fundamental core mode suppression in optical fibre containing absorbing rods. (December 2020)

• Record Type: Journal Article
• 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
• Is Part Of: Quantum electronics. Volume 50:Number 12(2020)
• Page Start: 1083
• Page End: 1087
• Publication Date: 2020-12
• Subjects: optical fibre -- fibre containing absorbing rods -- wavelength-selective filter -- resonance mode coupling.; Quantum electronics -- Periodicals; 537.5
• DOI: 10.1070/QEL17460
• Languages: English
• ISSNs: 1063-7818

Abstract

Abstract: 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.