Title :
Optimisation of a two colour pumped Tm3+-doped ZBLAN fibre amplifier at 1.49 μm
Author :
Tessarin, S. ; Lynch, M. ; Donegan, J.F. ; Mazé, G.
Author_Institution :
Dept. of Phys., Trinity Coll., Dublin, Ireland
Abstract :
The authors have constructed a 4 metre length thulium-doped ZBLAN fibre amplifier optically pumped at 0.8 μm by a tuneable Ti:Sapphire and at 1.06 μm by an Nd3+: YAG laser. The authors obtained 12.5 dB for small-signal gain at 60 mW for the two pumps´ optical power. The behaviour of the amplifier has been analysed with the optical power of the signal approaching the saturation condition (-5 dBm) and at different wavelengths for the Ti: Sapphire pump laser. A model was developed for the optimisation of the amplifier for signal power below the saturation intensity at wavelengths between 1.49 and 1.53 μm (S-band). This shows an empirical quadratic dependence of the Nd3+: YAG power with respect to the Ti:sapphire power in order to obtain the maximum photon conversion efficiency making the optimised amplifier employable as a booster amplifier in the supporting telecommunication band.
Keywords :
aluminium compounds; barium compounds; fluoride glasses; lanthanum compounds; laser beams; optical fibre amplifiers; optical pumping; optimisation; sodium compounds; thulium; zirconium compounds; 0.8 micron; 1.06 micron; 1.49 micron; 1.53 micron; 60 mW; Nd3+:YAG laser; Ti:sapphire pump laser; Tm3+-doped ZBLAN fibre amplifier; ZBLAN fibre amplifier; ZBLAN:Tm3+; ZrF4-BaF2-LaF3-AlF3-NaF:Tm; booster amplifier; empirical quadratic dependence; maximum photon conversion efficiency; optical power; optimisation; optimised amplifier; saturation condition; saturation intensity; signal power; small-signal gain; telecommunication band; two colour pumped fibre amplifier;
Journal_Title :
Optoelectronics, IEE Proceedings -
DOI :
10.1049/ip-opt:20050053
