Wavelength Sharing and Reuse in Dual-Band WDM-PON Systems Employing WRC-FPLDs

Abstract

Abstract-In this work, for the first time, we propose a dualband WDM-PON architecture that enables efficient non-overlapping wavelength reuse and mitigates bidirectional transmission impairments. Weak-resonant-cavity Fabry-Perot laser diodes (WRC-FPLDs) with gain spectra across C-and L-bands are implemented to achieve desirable colorless, uncooled, and inexpensive ONUs. The side mode suppression ratio and modulation performance of the injection-locked WRC-FPLDs with operational wavelengths from 1550 nm to 1580 nm are studied. 25-km transmission experiments have been demonstrated, where the injection-locked WRC-FPLDs are directly modulated with up to 5-Gbit/s OOK upstream signals. Improved signal quality with bit-error rates lower than 10 -9 is obtained which confirms that the dual-band architecture with wavelength sharing can be a potential candidate for future WDM-PON deployments. Index Terms-Wavelength division multiplexed passive optical network (WDM-PON), Fabry-Perot laser diode

An Economical and Ultra Dense WDM-PON System with Polarization Interleaving and PWR

“…Signals from the central office towards ONU is termed as downstream and are re-modulated in uplink i.e. transmitted back to OLT (optical line terminal) [8] [9]. Advantage of wavelength reuse is that downlink as well as uplink uses same wavelength for the operation and enhance the efficiency of wavelength utilization [10][11][12].…”

Performance Enhancement and Capacity Enlargement for a DWDM-PON System Utilizing an Optimized Cross Seeding Rayleigh Backscattering Design

“…These inhomogeneities act as refractive index fluctuations (or induced dipole moment) within the fiber and arise from density and compositional variations, which are frozen into the glass lattice upon cooling [12,13].Optical losses, due to RB in optical fibers, have caused considerable problems. Some examples of these problems include lowering the allowable bit rate, increasing the system's noise levels, and minimizing the transmission distances [14][15][16][17]. Detailed examples and deeper analyses can be found for bi-directional wavelength-reuse fiber systems and WDM-PON Systems in [14][15][16][17].…”

“…Optical losses, due to RB in optical fibers, have caused considerable problems. Some examples of these problems include lowering the allowable bit rate, increasing the system's noise levels, and minimizing the transmission distances [14][15][16][17]. Detailed examples and deeper analyses can be found for bi-directional wavelength-reuse fiber systems and WDM-PON Systems in [14][15][16][17].…”