Title :
Study on the gain excursion and tilt compensation for 1.4- and 1.5-μm dual wavelength pumped TDFA
Author :
Won Jae Lee ; Choong Hee Lee ; Philan Kim ; Jae-Oh Byun ; Jonghan Park ; Namkyoo Park
Author_Institution :
Opt. Commun. Syst. Lab., Seoul Nat. Univ., South Korea
fDate :
6/1/2002 12:00:00 AM
Abstract :
We analyze the gain excursion and tilt function of the thulium doped fiber amplifiers (TDFAs) for the 1.4- and 1.5-μm dual-wavelength pump approach. We also reveal that those two pump wavelengths act as independent control. factors for gain level and tilt function, because each pumps influence the populations of the first and second excited states (3H4-3F4) in a different manner. Gain excursion and gain tilt control of the TDFAs under the channel add-drop situations are demonstrated, revealing a suitable approach and inner dynamics of the gain/tilt excursion and compensation mechanisms for TDFAs.
Keywords :
excited states; optical fibre amplifiers; optical pumping; population inversion; thulium; 1.4 micron; 1.5 micron; channel add-drop situations; compensation mechanisms; dual wavelength pumped TDFA; first excited state; gain excursion; gain level; independent control. factors; inner dynamics; populations; second excited state; thulium doped fiber amplifiers; tilt compensation; tilt function; Communication system control; Erbium-doped fiber lasers; Optical attenuators; Optical fiber amplifiers; Optical fiber communication; Optical pumping; Pump lasers; Stimulated emission; Vehicle dynamics; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.1003093
