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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 21 — Oct. 13, 2008
  • pp: 16659–16669

First-principle derivation of gain in high-index-contrast waveguides

Jacob T. Robinson, Kyle Preston, Oskar Painter, and Michal Lipson  »View Author Affiliations

Optics Express, Vol. 16, Issue 21, pp. 16659-16669 (2008)

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From first principles we develop figures of merit to determine the gain experienced by the guided mode and the lasing threshold for devices based on high-index-contrast waveguides. We show that as opposed to low-index-contrast systems, this quantity is not equivalent to the power confinement since in high-index-contrast structures the electric and magnetic field distributions cannot be related by proportionality constant. We show that with a slot waveguide configuration it is possible to achieve more gain than one would expect based on the power confinement in the gain media. Using the figures of merit presented here we optimize a slot waveguide geometry to achieve low-threshold lasing and discuss the fabrication tolerances of such a design.

© 2008 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(130.3120) Integrated optics : Integrated optics devices
(140.5680) Lasers and laser optics : Rare earth and transition metal solid-state lasers

ToC Category:
Integrated Optics

Original Manuscript: July 15, 2008
Revised Manuscript: September 22, 2008
Manuscript Accepted: September 30, 2008
Published: October 3, 2008

Jacob T. Robinson, Kyle Preston, Oskar Painter, and Michal Lipson, "First-principle derivation of gain in high-index-contrast waveguides," Opt. Express 16, 16659-16669 (2008)

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