Abstract
Orthogonal frequency division multiplexing-passive optical network (OFDM-PON) and
single-carrier frequency division multiplexing (SCFDM)-PON are promising solutions for future
high-speed PON-based access. A polarization division multiplexing scheme with direct detection is
proposed for OFDM-PON to effectively reduce bandwidth requirements for components. However, the
scheme strictly requires spectrum overlapping of two orthogonal sidebands and the 4×4
multi-input-multi-output (MIMO) algorithm to eliminate complex cross-polarization interference. In
this letter, we propose a polarization interleaving (PI) approach that significantly reduces
bandwidth requirements for optical and electrical components while achieving a high-flexibility and
low-complexity MIMO algorithm. Downstream single sideband PI-SCFDM transmission is experimentally
demonstrated.
© 2012 Chinese Optics Letters
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