Title :
An investigation of the noise figure and conversion efficiency of 0.98 mu m pumped erbium-doped fiber amplifiers under saturated conditions
Author :
Smart, R.G. ; Zyskind, J.L. ; Sulhoff, J.W. ; DiGiovanni, D.J.
Author_Institution :
AT&T Bell Lab., Holmdel, NJ, USA
Abstract :
The results of an investigation of the noise figure and conversion efficiency or erbium-doped fiber amplifiers for unsaturated, moderately saturated, and heavily saturated operation are reported. Quantum-limited 3 dB noise figures result only for small signal operation of low-gain amplifiers. For high gain, partially saturated amplifiers useful as in-line repeaters, bidirectional pumping results in the best combination of noise performance and conversion efficiency while co-propagation of signal and pump produces the best noise performance.<>
Keywords :
erbium; fibre lasers; optical communication equipment; optical pumping; optical saturation; 0.98 micron; EDFA; ER-doped fibre amplifiers; IR; bidirectional pumping; conversion efficiency; high gain; in-line repeaters; laser pumping; low-gain amplifiers; noise figure; partially saturated amplifiers; saturated conditions; signal/pump co-propagation; small signal operation; Band pass filters; Distortion measurement; Erbium-doped fiber amplifier; Leg; Low-noise amplifiers; Noise figure; Optical fiber polarization; Power amplifiers; Power generation; Preamplifiers;
Journal_Title :
Photonics Technology Letters, IEEE
