Arrayed waveguide grating using the finite difference beam propagation method

M. C. F. Toledo; M. I. Alayo

doi:10.1117/12.2000826

13 March 2013 Arrayed waveguide grating using the finite difference beam propagation method

M. C. F. Toledo, M. I. Alayo

Proceedings Volume 8627, Integrated Optics: Devices, Materials, and Technologies XVII; 86271F (2013) https://doi.org/10.1117/12.2000826
Event: SPIE OPTO, 2013, San Francisco, California, United States

Abstract

The purpose of this work is to analyze by simulation the coupling effects occurring in Arrayed Waveguide Grating (AWG) using the finite difference beam propagation method (FD-BPM). Conventional FD-BPM techniques do not immediately lend themselves to the analysis of large structures such as AWG. Cooper et al.¹ introduced a description of the coupling between the interface of arrayed waveguides and star couplers using the numerically-assisted coupled-mode theory. However, when the arrayed waveguides are spatially close, such that, there is strong coupling between them, and coupled-mode theory is not adequate. On the other hand, Payne² developed an exact eigenvalue equation for the super modes of a straight arrayed waveguide which involve a computational overhead. In this work, an integration of both methods is accomplished in order to describe the behavior of the propagation of light in guided curves. This new method is expected to reduce the necessary effort for simulation while also enabling the simulation of large and curved arrayed waveguides using a fully vectorial finite difference technique.

Citation Download Citation

M. C. F. Toledo and M. I. Alayo "Arrayed waveguide grating using the finite difference beam propagation method", Proc. SPIE 8627, Integrated Optics: Devices, Materials, and Technologies XVII, 86271F (13 March 2013); https://doi.org/10.1117/12.2000826

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KEYWORDS

Waveguides

Beam propagation method

Wave propagation

Waveguide modes

Finite-difference time-domain method

Optical simulations

Refractive index

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