Publication Date:
2015-08-07
Description:
A refined model of a mid-IR amplifier, constituted by a tapered chalcogenide fiber coupled to an erbium-doped chalcogenide microsphere, is integrated with a global solution search procedure based on particle swarm optimization approach. It is implemented in a computer code in order to obtain an inversion algorithm useful to evaluate the spectroscopic parameters of rare-earth-doped glass microspheres. The rare earth parameters can be recovered by means of the optical gain measurement. The error in evaluation of the erbium lifetime $tau _{41}$ is <3.5%. It is <0.5% for the other lifetimes and ion–ion interaction parameters. These excellent results are obtained since whispering gallery mode electromagnetic field interacts with rare earth for long effective distances.
Print ISSN:
1041-1135
Electronic ISSN:
1941-0174
Topics:
Electrical Engineering, Measurement and Control Technology
