Title :
Wavelength Remodulation Using DPSK Down-and-Upstream With High Extinction Ratio for 10-Gb/s DWDM-Passive Optical Networks
Author_Institution :
Nat. Chiao Tung Univ., Hsinchu
Abstract :
We propose and demonstrate a novel wavelength remodulation scheme using differential phase-shift keying (DPSK) modulation format in both downstream and upstream signals for ldquocolorlessrdquo dense wavelength-division-multiplexed (DWDM) passive optical networks (PONs). The scheme enables high extinction ratio in both downstream and upstream remodulated signals. Error-free operation was achieved in a 20-km-reach 10-Gb/s DWDM-PON without dispersion compensation. Timing misalignment tolerance between downstream and upstream remodulated signals and maximum launched optical power for the proposed scheme are studied. Comparison with other wavelength remodulation schemes for DWDM-PONs is also performed, showing the proposed scheme can be a potential candidate for next-generation wavelength reuse DWDM-PONs.
Keywords :
differential phase shift keying; optical fibre networks; optical modulation; wavelength division multiplexing; bit rate 10 Gbit/s; dense wavelength division multiplexing; differential phase-shift keying; dispersion compensation; extinction ratio; passive optical networks; timing misalignment tolerance; wavelength remodulation; wavelength reuse; Differential quadrature phase shift keying; Erbium; Extinction ratio; Optical attenuators; Optical fiber networks; Optical interferometry; Optical network units; Optical transmitters; Passive optical networks; Wavelength division multiplexing; Differential phase-shift keying (DPSK); passive optical networks (PONs); wavelength remodulation;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.911009
