Title :
Crosstalk in 1.3 μm praseodymium fluoride fiber amplifiers
Author :
Fleming, Simon C.
Author_Institution :
Opt. Fibre Technol. Centre, Sydney Univ., NSW, Australia
fDate :
1/1/1996 12:00:00 AM
Abstract :
Praseodymium-doped fluoride fiber amplifiers have been demonstrated to provide good gain, output power, and noise performance in the second telecommunications window. This paper presents a study of the crosstalk performance of these amplifiers. A theoretical analysis is presented from which a numerical model is developed and is used to predict the crosstalk performance of a typical amplifier. Experimental results, using two separate signals within the gain band, show good agreement between measurement and theory, indicating that it is unlikely that crosstalk will present a problem in anticipated amplifier applications. From the measured crosstalk, an upper limit is placed on the lower level lifetime, indicating that the population of this level will have a negligible effect amplifier gain. A novel technique for measuring the upper state lifetime in an amplifier, based on pump power dependence of crosstalk, is described and experimental results which are in agreement with fluorescent decay are presented
Keywords :
fibre lasers; fluorescence; infrared sources; laser noise; optical communication equipment; optical crosstalk; optical fibre testing; optical pumping; praseodymium; radiative lifetimes; 1.3 mum; amplifier gain; crosstalk; crosstalk performance; fluorescent decay; gain band; good gain; lower level lifetime; noise performance; numerical model; output power; praseodymium fluoride fiber amplifiers; pump power dependence; second telecommunications window; separate signals; theoretical analysis; upper limit; upper state lifetime; Crosstalk; Fluorescence; Gain measurement; Numerical models; Optical amplifiers; Optical fiber amplifiers; Optical fibers; Performance analysis; Power amplifiers; Power generation;
Journal_Title :
Lightwave Technology, Journal of
