Title :
Noise characteristics of erbium-doped fiber amplifier pumped at 980 nm
Author :
Laming, R.I. ; Payne, D.N.
Author_Institution :
Southampton Univ., UK
fDate :
6/1/1990 12:00:00 AM
Abstract :
A noise figure of 2.9+or-0.4 dB, measured in a high-gain erbium-doped fiber amplifier for input signals in the range -35 to -15 dBm and for pump powers of >5.8 mW, is discussed. The spontaneous emission factor n/sub sp/ was 0.99+or-0.09 for input signals less than -15 dBm. These low figures are attributable to the optimized fiber design and the use of a pump wavelength of 980 nm, at which erbium operates as a true three-level system. These two factors contribute to the very low ( approximately 500 mu W) pump threshold seen in fiber, which permits nearly complete inversion to be achieved for the low pump powers employed.<>
Keywords :
erbium; fibre optics; optical pumping; population inversion; random noise; solid lasers; 5.8 mW; 500 muW; 980 nm; Er:fibre amplifier; high-gain; input signals; nearly complete inversion; noise figure; optical pumping; optimized fiber design; population inversion; pump powers; pump threshold; spontaneous emission factor; true three-level system; Crosstalk; Erbium-doped fiber amplifier; Erbium-doped fiber lasers; Laser excitation; Laser noise; Noise figure; Noise measurement; Optical fiber amplifiers; Optical fibers; Pump lasers;
Journal_Title :
Photonics Technology Letters, IEEE
