Theoretical and Experimental Analysis of Long-Period Fiber Gratings Made Directly Into Er-Doped Active Fibers

0341432 - ÚFE 2010 RIV US eng J - Journal Article
Krčmařík, David - Slavík, Radan - Kulishov, M. - Karásek, Miroslav
Theoretical and Experimental Analysis of Long-Period Fiber Gratings Made Directly Into Er-Doped Active Fibers.
Journal of Lightwave Technology. Roč. 27, č. 13 (2009), s. 2335-2342. ISSN 0733-8724. E-ISSN 1558-2213
R&D Projects: GA ČR(CZ) GA102/07/0999; GA AV ČR KJB200670601
Institutional research plan: CEZ:AV0Z20670512
Keywords : optical communications * optical fibre * fibre gratings
Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering
Impact factor: 2.185, year: 2009

We present a rigorous theoretical and experimental analysis of signal propagation along a long-period fiber grating (LPFG) made in an Erbium-doped amplifying fiber (EDF). First, numerous effects that influence amplifying process in Erbium-doped fibers were considered. These are clustering of Er ions and subsequent upconversion and change of fiber refractive index due to the optical pumping. Subsequently, LPFG-assisted interaction between the amplified fiber core mode and a cladding mode is described combining rate equations that describe propagation through the EDF and coupled-mode equations that describe propagation through the LPFG. While this implementation is relatively straightforward for the signal and pump, it requires particular attention when dealing with spontaneous emission and amplified spontaneous emission (ASE) that are incoherent (described purely by amplitude), but have to diffract on the LPFG (that is amplitude and phase sensitive).
Permanent Link: http://hdl.handle.net/11104/0184429