Title :
Tunable gain equalization using a Mach-Zehnder optical filter in multistage fiber amplifiers
Author :
Inoue, Kyo ; Kominato, Toshimi ; Toba, Hiromu
Author_Institution :
NTT Lab., Kanagawa, Japan
Abstract :
Tunable signal gain equalization is demonstrated in three-stage Er/sup 3+/-doped fiber amplifiers using a waveguide type Mach-Zehnder (MZ) optical fiber. A 29-channel multiplexed system is examined where signal wavelengths are positioned from 1.548 to 1.555 mu m. By adjusting the MZ transmittance with the external control current, tunable gain equalization is achieved at the output of each amplifier.<>
Keywords :
erbium; fibre lasers; laser tuning; optical communication equipment; optical filters; 1.548 to 1.555 micron; 29-channel multiplexed system; Mach-Zehnder optical filter; external control current; lightwave communication; multistage fiber amplifiers; three-stage Er/sup 3+/-doped fiber amplifiers; tunable gain equalisation; waveguide type Mach Zehnder optical fibre; Bandwidth; Optical amplifiers; Optical attenuators; Optical fiber amplifiers; Optical fiber communication; Optical filters; Optical saturation; Optical waveguides; Semiconductor optical amplifiers; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
