Title :
Fiber coupled Er3+: Chalcogenide microsphere amplifier in mid-IR wavelength range
Author :
Palma, G. ; Castellano, T. ; Losito, O. ; Yano, Takao ; Nazabal, V. ; Taguchi, J. ; MoreÌac, A. ; Ferrari, Mauro ; Prudenzano, F.
Author_Institution :
Dipt. di Ing. Elettr. e dell´Inf., Politec. di Bari, Bari, Italy
Abstract :
A mid-IR amplifier constituted of a tapered chalcogenide fiber coupled to an Er3+-doped chalcogenide microsphere has been optimized via a particle swarm optimization (PSO) algorithm. The numerical model is based on the coupled mode theory and on the erbium rate equations, including the main transitions among the ion energy levels. The PSO has allowed the optimal choice of the microsphere and taper fiber radius, fiber angle taper, fiber-microsphere gap in order to maximize the amplifier gain, which is close to G=7 dB, calculated for a pump power Pp = 100 mW and the input signal power Ps = -50 dBm, at signal wavelength λ=4500 nm.
Keywords :
chalcogenide glasses; coupled mode analysis; erbium; micro-optics; optical fibre amplifiers; optical fibre couplers; optical pumping; particle swarm optimisation; PSO algorithm; amplifier gain; coupled mode theory; erbium rate equations; fiber coupled Er3+: chalcogenide microsphere amplifier; ion energy levels; particle swarm optimization; pump power; tapered chalcogenide fiber; Glass; Mathematical model; Optical fiber amplifiers; Optical fiber sensors; Optical fiber theory; Optical resonators; PSO; chalcogenide glass; lasers; microsphere; optics; photonics;
Conference_Titel :
Photonics Conference, 2014 Third Mediterranean
Conference_Location :
Trani
DOI :
10.1109/MePhoCo.2014.6866469
