Title :
New tapered active fibres for very low noise amplifier applications
Author :
Bjarklev, A. ; Lumholt, O. ; Povlsen, J.H. ; Rasmussen, T. ; Rottwitt, Karsten ; Dahl-Petersen, S. ; Larsen, C.C.
Author_Institution :
Electromagn. Inst., Tech. Univ. of Denmark, Lyngby, Denmark
Abstract :
A new Er-doped fibre design for low noise amplifier applications is presented. The active fibre is continuously uptapered from the signal input end to the signal output end. Generated amplified spontaneous emission is thus reduced and high gain properties are preserved. Noise figure reductions of more than 0.5 dB for copropagating pump and 2.0 dB for counterpropagating pump are predicted.
Keywords :
fibre lasers; optical communication equipment; optical fibres; Er-doped fibre design; amplified spontaneous emission; copropagating pump; counterpropagating pump; high gain properties; low noise amplifier applications; tapered active fibres;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920021
