Title :
Gain-shifted thulium-doped fibre amplifiers employing novel high concentration doping technique
Author :
Aozasa, S. ; Sakamoto, T. ; Kanamori, T. ; Hoshino, K. ; Shimizu, M.
Author_Institution :
NTT Photonics Lab., Ibaraki, Japan
fDate :
3/2/2000 12:00:00 AM
Abstract :
A novel high thulium concentration doping technique is proposed for shifting the gain band in thulium-doped fibre amplifiers (TDFAs). The gain peak shifts from 1473 to 1505 nm when the Tm3+ concentration is increased from 2000 to 8000 ppm. The authors have achieved gains of >18 dB and a noise figure (NF) of <7 dB from 1480 to 1510 nm (30 nm bandwidth) for a total pump power of 500 mW
Keywords :
gain measurement; laser beams; laser noise; laser variables measurement; optical fibre amplifiers; optical pumping; population inversion; thulium; 1473 to 1505 nm; 1480 to 1510 nm; 18 dB; 500 mW; 7 dB; Tm-doped fibre amplifiers; Tm3+ concentration; bandwidth; gain band; gain peak; gain peak shift; gain-shifted Tm-doped fibre amplifiers; high concentration doping technique; laser gain; noise figure; total pump power;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20000332
