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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 16, Iss. 5 — May. 1, 1998
  • pp: 929–

Polarization Rotation in Semiconductor Bending Waveguides: A Coupled-Mode Theory Formulation

Wayne W. Lui, Takuo Hirono, Kiyoyuki Yokoyama, and Wei-Ping Huang

Journal of Lightwave Technology, Vol. 16, Issue 5, pp. 929- (1998)


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Abstract

A theoretical model for the bending waveguide polarization rotator has been developed based on the full-vectorial wave equations and the coupled-mode theory. Calculation results from this model are found to agree favorably with measurement data reported in literature. It is found that the polarization conversion efficiency of this device hinges on the degree of asymmetry of the cross-sectional field profile with respect to both the x- and y-axes. Sensitivity analysis, furthermore, revealed that the device characteristics are strongly dependent on the waveguide geometry, in particular, the sidewall tilt angle and the amount of over-etch of the ridge waveguide. Finally, it is also found that the bending waveguide polarization rotator is virtually wavelength independent, making it suitable for wavelength division multiplexing (WDM) applications.

[IEEE ]

Citation
Wayne W. Lui, Takuo Hirono, Kiyoyuki Yokoyama, and Wei-Ping Huang, "Polarization Rotation in Semiconductor Bending Waveguides: A Coupled-Mode Theory Formulation," J. Lightwave Technol. 16, 929- (1998)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-16-5-929


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References

  1. A. S. Sudb , "Why are accurate computations of mode fields in rectangular dielectric waveguides difficult?," J. Lightwave Technol., vol. 10, pp. 418-419, 1992.
  2. W.-P. Huang and Z. M. Mao, "Polarization rotation in periodic loaded rib waveguides," J. Lightwave Technol., vol. 10, pp. 1825-1831, Dec. 1992.

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