Title :
Analysis on the transient response of 1.55-μm/1.4-μm dual-wavelength pumped thulium-doped fiber amplifiers
Author :
Jae-Oh Byun ; Pilhan Kim ; Won Jae Lee ; Choong Hee Lee ; Namkyoo Park
Author_Institution :
Sch. of Electron. Eng. & Comput. Sci., Seoul Nat. Univ., South Korea
Abstract :
The transient response of S- and S/sup +/-band thulium-doped fiber amplifiers with 1.4-μm/1.5-μm dual-wavelength pumping scheme was investigated both experimentally and theoretically. In contrast to conventional Erbium-doped fiber amplifiers, two characteristic time-constants related with 3F4 and 3H4 level lifetime were observed, implying the need of much complex transient control algorithm for the future applications. The amount of surviving channel gain, gain excursion, and related time constants showed changes in their response characteristics, depending on the combinations of main pump, subsidiary pump, and signal powers. A simplified numerical approach for the analysis of transient response in thulium-doped fiber amplifiers under average inversion framework, will be provided.
Keywords :
optical communication equipment; optical fibre amplifiers; optical pumping; telecommunication channels; telecommunication network reliability; thulium; transients; 1.4 micron; 1.5 micron; 1.55 micron; characteristic time-constants; complex transient control algorithm; dual-wavelength pumped thulium-doped fiber amplifiers; dual-wavelength pumping scheme; gain excursion; level lifetime; main pump; response characteristics; signal powers; subsidiary pump; surviving channel gain; time constants; transient response; Erbium-doped fiber amplifier; Optical attenuators; Optical fiber amplifiers; Optical fiber networks; Optical filters; Optical pumping; Optical saturation; Stimulated emission; Transient analysis; Transient response;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.803336
