Title :
Noise in an optical amplifier: formulation of a new semiclassical model
Author :
Donati, Silvano ; Giuliani, Guido
Author_Institution :
Dipt. di Elettronica, Pavia Univ., Italy
fDate :
9/1/1997 12:00:00 AM
Abstract :
After pointing out some questionable assumptions of the standard beating theory, we formulate a new semiclassical wave theory of the noise in optical amplifiers. The theory is simple yet rigorous and uses a few quantum statements in a classical signal framework. The amplifier is modeled as a 2×2 port device, and the amplified spontaneous emission and associated noise are shown to be just the amplified coherent state (or vacuum state) fluctuation of the field entering the idler input. The new theory can treat other closely related detection schemes as well, correctly supplying both mean signal and noise
Keywords :
laser noise; laser theory; photodetectors; quantum optics; superradiance; 2×2 port device; amplified coherent state; amplified spontaneous emission; classical signal framework; detection schemes; fluctuation; idler input; laser amplifiers; laser theory; mean signal; optical amplifier noise; quantum statements; rigorous; semiclassical model; semiclassical wave theory; standard beating theory; vacuum state; Bandwidth; Equations; Fluctuations; Optical amplifiers; Optical noise; Optical signal detection; Quantum mechanics; Semiconductor optical amplifiers; Spontaneous emission; Stimulated emission;
Journal_Title :
Quantum Electronics, IEEE Journal of
