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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 10 — May. 19, 2014
  • pp: 12296–12306

Theoretical investigation of the more suitable rare earth to achieve high gain in waveguide based on silica containing silicon nanograins doped with either Nd3+ or Er3+ ions

Alexandre Fafin, Julien Cardin, Christian Dufour, and Fabrice Gourbilleau  »View Author Affiliations

Optics Express, Vol. 22, Issue 10, pp. 12296-12306 (2014)

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We present a comparative study of the gain achievement in a waveguide whose active layer is constituted by a silica matrix containing silicon nanograins acting as sensitizer of either neodymium ions (Nd3+) or erbium ions (Er3+). By means of an auxiliary differential equation and finite difference time domain (ADE-FDTD) approach that we developed, we investigate the steady states regime of both rare earths ions and silicon nanograins levels populations as well as the electromagnetic field for different pumping powers ranging from 1 to 104 mW/mm2. Moreover, the achievable gain has been estimated in this pumping range. The Nd3+ doped waveguide shows a higher gross gain per unit length at 1064 nm (up to 30 dB/cm) than the one with Er3+ doped active layer at 1532 nm (up to 2 dB/cm). Taking into account the experimental background losses we demonstrate that a significant positive net gain can only be achieved with the Nd3+ doped waveguide.

© 2014 Optical Society of America

OCIS Codes
(160.5690) Materials : Rare-earth-doped materials
(230.5590) Optical devices : Quantum-well, -wire and -dot devices
(230.7370) Optical devices : Waveguides
(050.1755) Diffraction and gratings : Computational electromagnetic methods
(230.4480) Optical devices : Optical amplifiers

ToC Category:

Original Manuscript: March 24, 2014
Revised Manuscript: May 5, 2014
Manuscript Accepted: May 5, 2014
Published: May 13, 2014

Alexandre Fafin, Julien Cardin, Christian Dufour, and Fabrice Gourbilleau, "Theoretical investigation of the more suitable rare earth to achieve high gain in waveguide based on silica containing silicon nanograins doped with either Nd3+ or Er3+ ions," Opt. Express 22, 12296-12306 (2014)

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