Abstract

In this paper, an improved design for a short and low-loss polarization rotator is proposed, consisting of a single-section asymmetrical waveguide butt-coupled between two standard rib waveguides. At a wavelength of 1.55 m, nearly 100% polarization conversion ratio is obtained, with a relatively short (320 m) device length and an extremely low 0.5 dB total insertion loss. The simulation results are obtained using the full vectorial finite-element-based beam propagation, the junction analysis, and the modal solution approaches.

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J. Lightwave Technol. (3)

B. M. A. Rahman and J. B. Davies, "Analysis of optical waveguide discontinuities", J. Lightwave Technol., vol. 6, pp. 52-57, 1988.

M. Rajarajan, B. M. A. Rahman, T. Wongcharoen and K. T. V. Grattan, "Accurate characterization of MMI devices with 2-dimensional confinement", J. Lightwave Technol., vol. 14, pp. 2078-2084, 1996.

S. S. A. Obayya, B. M. A. Rahman and H. A. El-Mikati, "New full-vectorial numerically efficient propagation algorithm based on the finite element method", J. Lightwave Technol., vol. 18, pp. 409-415, Mar. 2000.

Opt. Lett. (1)

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