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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 7 — Mar. 26, 2012
  • pp: 7616–7629

Design of mid-infrared amplifiers based on fiber taper coupling to erbium-doped microspherical resonator

Luciano Mescia, Pietro Bia, Marco De Sario, Annalisa Di Tommaso, and Francesco Prudenzano  »View Author Affiliations

Optics Express, Vol. 20, Issue 7, pp. 7616-7629 (2012)

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A dedicated 3D numerical model based on coupled mode theory and solving the rate equations has been developed to analyse, design and optimize an optical amplifier obtained by using a tapered fiber and a Er3+-doped chalcogenide microsphere. The simulation model takes into account the main transitions among the erbium energy levels, the amplified spontaneous emission and the most important secondary transitions pertaining to the ion–ion interactions. The taper angle of the optical fiber and the fiber-microsphere gap have been designed to efficiently inject into the microsphere both the pump and the signal beams and to improve their spatial overlapping with the rare earth doped region. In order to reduce the computational time, a detailed investigation of the amplifier performance has been carried out by changing the number of sectors in which the doped area is partitioned. The simulation results highlight that this scheme could be useful to develop high efficiency and compact mid-infrared amplifiers.

© 2012 OSA

OCIS Codes
(140.4480) Lasers and laser optics : Optical amplifiers
(230.5750) Optical devices : Resonators

ToC Category:
Lasers and Laser Optics

Original Manuscript: December 22, 2011
Revised Manuscript: February 16, 2012
Manuscript Accepted: February 21, 2012
Published: March 20, 2012

Luciano Mescia, Pietro Bia, Marco De Sario, Annalisa Di Tommaso, and Francesco Prudenzano, "Design of mid-infrared amplifiers based on fiber taper coupling to erbium-doped microspherical resonator," Opt. Express 20, 7616-7629 (2012)

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