Abstract

We propose a low-loss ultracompact optical power splitter for broadband passive optical network applications. The design is based on a multistep structure involving a two-material (core/cladding) system. The performance of the proposed device was evaluated through the three-dimensional finite-difference beam propagation method. By using the proposed design, an excess loss of 0.4dB was achieved at a full branching angle of 24°. The wavelength-dependent loss was found to be less than 0.3dB, and the polarization-dependent loss was less than 0.05dB from O to L bands. The device offers the potential of being mass-produced using low-cost polymer-based embossing techniques.

© 2010 Optical Society of America

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