Title :
Anomalous dispersion in Er3+ and Yb3+-doped fibers
Author :
Korobkin, D.V., Jr. ; Semenov, V.A. ; Dianov, E.M.
Author_Institution :
Dept. of Mech. & Aerosp. Eng., Princeton Univ., NJ, USA
fDate :
2/1/1995 12:00:00 AM
Abstract :
In experimental and theoretical study of anomalous dispersion in Er3+and Er3+-Yb3+-doped fibers has been developed. Anomalous time delay caused by both absorption and emission at 1.535 μm has been theoretically calculated and experimentally measured. A pump power dependence of anomalous time delay in rare-earth-doped fibers has been theoretically calculated and experimentally investigated. It has been shown that pump power fluctuations lead to propagation time jitter in Er3+-doped fiber amplifiers. The pulse interaction due to refractive index change caused by gain saturation is predicted. It has been shown that for Er 3+-doped fibers with SiO2-GeO2 core composition, the anomalous dispersion per 1-dB gain is twice that of fibers with SiO2-Al2O3 core, which is caused by gain curve form difference. A scheme of mutual compensation of intrinsic fiber dispersion and anomalous dispersion caused by Er3+ in the region 1.532-1.537 μm has been suggested
Keywords :
erbium; jitter; optical dispersion; optical fibre dispersion; optical fibres; refractive index; ytterbium; 1 dB; 1.532 to 1.537 mum; 1.535 mum; Er3+,Yb3+-doped fibers; Er3+-doped fiber amplifiers; SiO2-Al2O3 core; SiO2-GeO2; Yb3+-doped fibers; absorption; anomalous dispersion; anomalous time delay; emission; gain curve form difference; gain saturation; intrinsic fiber dispersion; propagation time jitter; pulse interaction; pump power dependence; pump power fluctuations; rare-earth-doped fibers; refractive index change; Absorption; Delay effects; Erbium; Fiber lasers; Laser excitation; Optical fiber dispersion; Optical fibers; Pump lasers; Refractive index; Time measurement;
Journal_Title :
Lightwave Technology, Journal of
