Title :
Dynamic gain and output power control in a gain-flattened erbium-doped fiber amplifier
Author :
Park, Seo Yeon ; Kim, Hyang Kyun ; Lyu, Gap Yeol ; Kang, Sun Mo ; Shin, Sang-Yung
Author_Institution :
Electron. & Telecommun. Res. Inst., Taejon, South Korea
fDate :
6/1/1998 12:00:00 AM
Abstract :
We demonstrate an erbium-doped fiber amplifier (EDFA) that has a flat-gain spectrum over an 18-nm band and a constant per-channel output power regardless of the input powers and the number of channels. The gain flatness and the constant output are obtained by changing the laser diode pump power and the attenuation of the voltage-controlled attenuator (VCA) dynamically. The response times of pump control circuit and attenuator control circuit are 650 ns and 9 ms, respectively. The power excursion of surviving channel in an EDFA with fast control circuit is /spl sim/1% of that without fast control circuit when channels are added or dropped.
Keywords :
erbium; fibre lasers; impurity absorption spectra; infrared spectra; optical communication equipment; optical pumping; wavelength division multiplexing; 650 ns; 9 ms; attenuator control circuit; channel number; constant output; constant per-channel output power; dynamic gain; fast control circuit; flat-gain spectrum; gain-flattened erbium-doped fiber amplifier; input powers; laser diode pump power; output power control; power excursion; pump control circuit; surviving channel; voltage-controlled attenuator; Arrayed waveguide gratings; Circuits; Erbium-doped fiber amplifier; Fiber nonlinear optics; Optical attenuators; Optical filters; Optical losses; Optical pumping; Power amplifiers; Power generation;
Journal_Title :
Photonics Technology Letters, IEEE
