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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 23, Iss. 3 — Mar. 1, 2005
  • pp: 1308–

Birefringence Control Using Stress Engineering in Silicon-on-Insulator (SOI) Waveguides

Winnie N. Ye, Dan-Xia Xu, Siegfried Janz, Pavel Cheben, Marie-Josée Picard, Boris Lamontagne, and N. Garry Tarr

Journal of Lightwave Technology, Vol. 23, Issue 3, pp. 1308- (2005)


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Abstract

We demonstrate that stress engineering is an effective tool to modify or eliminate polarization dispersion in silicon-on-insulator (SOI) waveguide devices, for a wide range of waveguide cross-section shapes and dimensions. The stress-induced effects on the modal birefringence of SOI waveguides are investigated numerically and experimentally. Finite-element simulations show that while the birefringence of ridge waveguides with both slanted and vertical sidewalls can be effectively modified using cladding stress, the birefringence becomes much less sensitive to dimension fluctuations with decreasing sidewall slope. To efficiently simulate the stress-induced effects we propose a normalized plane-strain model which can achieve comparable accuracy as a fully generalized plane-strain model but requires significantly less computational resources. Excellent agreement is achieved between the calculated and measured birefringence tuning using SiO2 cladding induced stress. Finally, both calculations and experiments confirm that cladding induced stress can be used to eliminate the birefringence in SOI waveguides of arbitrary shapes, for typical SiO2 film stress values (sigma_film approximately -100 to -300 MPa) and cladding thicknesses of the order of 1 µm or less.

© 2005 IEEE

Citation
Winnie N. Ye, Dan-Xia Xu, Siegfried Janz, Pavel Cheben, Marie-Josée Picard, Boris Lamontagne, and N. Garry Tarr, "Birefringence Control Using Stress Engineering in Silicon-on-Insulator (SOI) Waveguides," J. Lightwave Technol. 23, 1308- (2005)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-23-3-1308

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