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In this study, a symmetric polarization-division-multiplexing (PDM) wavelength-division-multiplexing passive optical network (WDM-PON) with fiber to the extension (FTTE) architecture is presented and investigated. The proposed PON can also avoid the Rayleigh backscattering (RB) interference noise. Here, each WDM wavelength can produce 25&#x00A0;Gbit&#x002F;s on-off keying (OOK) and 10&#x00A0;Gbit&#x002F;s OOK modulation channels simultaneously in x- and y-polarizations (Pol<sub>x</sub> and Pol<sub>y</sub>) through PDM method for 25 and 105&#x00A0;km single-mode fiber (SMF) transmissions without dispersion compensation. The measured minimal power budget of 25 and 10&#x00A0;Gbit&#x002F;s downstream and upstream signals are 29 and 35.1&#x00A0;dB and 29.8 and 31.5&#x00A0;dB, respectively, at the forward error correction (FEC) target. Therefore, the proposed PDM WDM-PON architecture can not only offer symmetric 35&#x00A0;Gbit&#x002F;s downstream and upstream connections by the dual-polarized wavelength, but also can avoid the RB-induced interference noise. In addition, the presented dual-polarized downstream signal also can provide information security in physical layer, when the unauthorized user occupies unlawfully.

Dual-Polarized WDM Access Network With Fiber to the Extension (FTTE) Connection