Title :
Broad-band erbium-doped fiber amplifier flattened beyond 40 nm using long-period grating filter
Author :
Wysocki, Paul F. ; Judkins, Justin B. ; Espindola, Rolando P. ; Andrejco, Matthew ; Vengsarkar, Ashish M.
Author_Institution :
Lucent Technol., Bell Lab., Murray Hill, NJ, USA
Abstract :
Broad-bandwidth amplification is essential for the construction of high-capacity multichannel communication systems. We describe a silica-based erbium doped fiber amplifier (EDFA) with a flat gain bandwidth exceeding 40 nm. The dual-stage EDFA includes a precisely designed inter-stage long-period fiber grating filter with more than 14-dB peak attenuation. By careful choice of the filter spectrum and fiber lengths, this EDFA is flat to within 1 dB over 40 nm while producing a noise figure below 4.0 dB and nearly +15-dBm output power.
Keywords :
diffraction gratings; erbium; fibre lasers; laser noise; optical fibre communication; optical fibre filters; wavelength division multiplexing; wideband amplifiers; 40 dB; SiO:Er; broad-band Er-doped fiber amplifier; broad-bandwidth amplification; dual-stage EDFA; fiber lengths; filter spectrum; flat gain bandwidth; high-capacity multichannel communication systems; inter-stage long-period fiber grating filter; long-period grating filter; noise figure; output power; silica-based EDFA; Attenuation; Bandwidth; Doped fiber amplifiers; Erbium; Erbium-doped fiber amplifier; Fiber gratings; Filters; Noise figure; Optical fiber communication; Power generation;
Journal_Title :
Photonics Technology Letters, IEEE
