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Colorless Optical Network Unit Based on Silicon Photonic Components for WDM PON

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8 Author(s)
Lin Xu ; Dept. of Electr. Eng., Columbia Univ., New York, NY, USA ; Qi Li ; Ophir, N. ; Padmaraju, K.
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We demonstrate a low-cost colorless optical network unit (ONU) utilizing silicon photonic components for wavelength division multiplexed passive-optical-networks. At the ONU, a waveguide-coupled microring works as a demultiplexer for separating the downstream signal from the centrally distributed continuous-wave (CW) light. The 10-Gb/s downstream signal is received using a waveguide-integrated germanium photodetector while the CW light is further modulated at 5 Gb/s using a silicon microring modulator for upstream signal generation. Error-free transmission over 25-km single mode fiber is achieved with 0.2- and 0.4-dB power penalties for the downstream and upstream signals, respectively. Complementary metal-oxide semiconductor-compatible silicon photonic technology offers the potential for monolithic integration and mass production.

Published in:

Photonics Technology Letters, IEEE  (Volume:24 ,  Issue: 16 )

Date of Publication:

Aug.15, 2012

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