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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 20 — Sep. 28, 2009
  • pp: 17818–17828

Large tuning of birefringence in two strip silicon waveguides via optomechanical motion

Jing Ma and Michelle L. Povinelli  »View Author Affiliations

Optics Express, Vol. 17, Issue 20, pp. 17818-17828 (2009)

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We present an optomechanical method to tune phase and group birefringence in parallel silicon strip waveguides. We first calculate the deformation of suspended, parallel strip waveguides due to optical forces. We optimize the frequency and polarization of the pump light to obtain a 9nm deformation for an optical power of 20mW. Widely tunable phase and group birefringence can be achieved by varying the pump power, with maximum values of 0.026 and 0.13, respectively. The giant phase birefringence allows linear to circular polarization conversion within 30µm for a pump power of 67mW. The group birefringence gives a tunable differential group delay of 6fs between orthogonal polarizations. We also evaluate the tuning performance of waveguides with different cross sections.

© 2009 OSA

ToC Category:
Integrated Optics

Original Manuscript: July 7, 2009
Revised Manuscript: September 4, 2009
Manuscript Accepted: September 8, 2009
Published: September 21, 2009

Jing Ma and Michelle L. Povinelli, "Large tuning of birefringence in two strip silicon waveguides via optomechanical motion," Opt. Express 17, 17818-17828 (2009)

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