Title :
A semiclassical model for noise propagation in depleted-pump optical amplifiers
Author :
Annovazzi-Lodi, Valerio ; Merlo, Sabina
Author_Institution :
Dipt. di Elettronica, Pavia Univ., Italy
fDate :
10/1/1998 12:00:00 AM
Abstract :
Erbium-doped and parametric fiber-optic amplifiers can be modeled as a cascade of “amplifying” beamsplitters, each representing a short fiber section in which the pump is approximately constant. Each beamsplitter obeys simple noise combination relations and its gain is calculated from the standard rate equations. The proposed model allows for the management of pump depletion in a very simple way by numerical analysis, avoiding direct quantum mechanical calculations. Sample noise propagation diagrams are reported for technically significant values of the parameters. For the four-wave-mixing amplifier, it has been found that the 3-dB noise limit can be reached even for a strong gain compression
Keywords :
erbium; fibre lasers; laser noise; multiwave mixing; optical elements; optical fibre networks; optical parametric amplifiers; optical pulse compression; optical transmitters; 3 dB; Er-doped fiber-optic amplifiers; amplifying beamsplitters; beamsplitter; depleted-pump optical amplifiers; direct quantum mechanical calculations; four-wave-mixing amplifier; gain; gain compression; noise combination relations; noise limit; noise propagation; numerical analysis; parametric fiber-optic amplifiers; pump depletion; sample noise propagation diagrams; semiclassical model; standard rate equations; Crosstalk; Erbium-doped fiber amplifier; Optical amplifiers; Optical fiber amplifiers; Optical fiber communication; Optical fiber networks; Optical noise; Optical propagation; Semiconductor optical amplifiers; Stimulated emission;
Journal_Title :
Quantum Electronics, IEEE Journal of
