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An optical network unit for WDM access networks with downstream DPSK and upstream remodulated OOK data using injection-locked FP laser

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4 Author(s)
Wai Hung ; Dept. of Inf. Eng., Chinese Univ. of Hong Kong, Shatin, China ; Chun-Kit Chan ; Lian-Kuan Chen ; Tong, Frank

We investigate the use of optical differential phase-shift keying (DPSK) as the downstream modulation format in a low-cost upstream data remodulation scheme for a wavelength-division multiplexing (WDM)-based passive optical network. A 2.5-Gb/s upstream data transmitter is realized by directly modulating a Fabry-Perot (FP) laser, injection-locked with a 10-Gb/s downstream optical DPSK signal. A simple polarization-offset technique is proposed to largely minimize the induced power penalty.

Published in:

Photonics Technology Letters, IEEE  (Volume:15 ,  Issue: 10 )