Title :
Study on the transient response for 1.4 μm/1.5 μm dual wavelength pumped thulium-doped fiber amplifiers
Author :
Byun, Jae-Oh ; Lee, Won Jae ; Lee, Choong Hee ; Park, Namkyoo
Author_Institution :
Sch. of Electron. Eng. & Comput. Sci., Seoul Nat. Univ., South Korea
Abstract :
Summary form only given. We characterized for the first time the surviving channel transient responses of TDFA, as a function of 1.5 μm subsidiary pump power in combination with 1.4 μm main pump. Results show the existence of signature on the transient curve from the lower state (i.e. first excited state 3F4) lifetime, making the response curve characteristics from that of an EDFA. Also found includes the differentiation of TDFA operation regimes in the transient responses, depending on the relative strengths on the main pump power, subsidiary pump power, and signal strengths. Different time constants at ∼60 μs and ∼8 ms time have been characterized to explain all these phenomena. Our results suggest the need of different transient/gain excursion control algorithms to TDFA for future applications, different from that of EDFA.
Keywords :
excited states; optical fibre amplifiers; optical pumping; thulium; 1.4 μm main pump; 1.4 micron; 1.5 μm subsidiary pump power; 1.5 micron; 60 mus; 8 ms; TDFA; TDFA operation regimes; Tm-doped fiber amplifiers; dual wavelength pumped thulium-doped fiber amplifiers; first excited state; gain excursion control algorithms; lower state lifetime; response curve characteristics; signal strengths; surviving channel transient responses; time constants; transient response; Doped fiber amplifiers; Erbium-doped fiber amplifier; Laser excitation; Optical fiber amplifiers; Optical fiber communication; Optical fiber networks; Optical pumping; Transient response; Tunable circuits and devices; Wavelength division multiplexing;
Conference_Titel :
Optical Fiber Communication Conference and Exhibit, 2002. OFC 2002
Print_ISBN :
1-55752-701-6
DOI :
10.1109/OFC.2002.1036562
