J. Arnaud, F. Coste, J. Fesquet
Electronics Letters, Volume 20, n°18, 30/08/1984
We have calculated the noise-enhancement factor of a semi-conductor laser amplifier with a very thin active region. This (somewhat academic) model exhibits large Petermann’s K-factors. However, the calculated noise-enhancement factor K’is only about half the K-value. The reason for the discrepancy is that in evaluating K’ the radiation modes of the guiding strcture have been taken into account. Similar conclusions have been reached for realistic laser models. These theorical considerations show that gain-guided laser amplifiers are not noisy as was originally thought.
LIEN VERS L’ARTICLE : NOISE ENHANCEMENT IN LASER AMPLIFIERS CAUSED BY GAIN NONUNIFORMITY