Oladeji Akanbi

A new scheme for bidirectional WDM-PON using upstream and downstream channels generated by optical carrier suppression and separation technique

We propose a new bidirectional dense wavelength-division-multiplexing (DWDM)-based passive optical network using optical carrier suppression and separation technique to generate both upstream and downstream wavelength channels from a single laser. Thirty-two DWDM channels have been generated, and symmetric 10-Gb/s data transmission of a wavelength pair has been demonstrated.

Demonstration of a Novel WDM Passive Optical Network Architecture With Source-Free Optical Network Units

A novel wavelength-division multiplexing passive optical network architecture with the capability to provide triple-play services (TPS) with a source-free optical network unit has been proposed and experimentally demonstrated. TPS provision with two 2.5-Gb/s, 10-Gb/s downstream signals and 10-Gb/s upstream signals per channel has been successfully realized

Bi-directional transmission of 8x10Gb/s DPSK signals over 80km of SMF-28 Fiber using in-line semiconductor optical amplifier.

We report the bi-directional transmission of 8x10Gb/s signals using an in-line SOA over 80km SMF-28 with matching DCF for the first time. Our results suggest very promising applications for bi-directional transmission in metro and access networks with simple configuration and low cost.

A Novel WDM-PON Architecture with Centralized Lightwaves in the OLT for Providing Triple Play Services

A novel WDM-PON architecture with centralized lightwave source in the optical line terminal (OLT) for providing triple play services has been proposed and demonstrated. Triple play service provision with 2.5 Gbit/s video signals, 10 Gbit/s downstream signals, and 10 Gbit/s upstream signals per channel has been successfully realized.

A Novel Scalable Multistage DWDM PON Architecture Using Cascaded Optical Interleavers With Increasing Periodicities Controlled in Central Offices

A new multistage scheme for dense wavelength division multiplexed passive optical networks (DWDM PON) is proposed. This scheme is realized by cascading optical interleavers with increasing periodicities. Downstream transmission of a DWDM comb consisting of four 10 Gb/s channels is demonstrated in the proposed multistage network. We also show a scheme to provide upstream transmission. Experimental results show that this technique has the potential to support many groups of customers located at various distances from the central office.

Bi-directional DPSK transmission of 16/spl times/10 Gb/s DWDM channels over 80 km SMF-28 using semiconductor optical amplifiers

The use of SOAs as in-line amplifiers in WDM systems leads to crosstalk as a result of cross-gain modulation. Constant intensity modulation format such as differential phase-shift-keying is in principle immune to XGM-induced crosstalk in SOAs. We report the reduction of crosstalk in a bi-directional system and successfully realize 16/spl times/10 Gb/s DWDM signals transmission over 80 km SMF-28 using DPSK modulation format for the first time.

Bi-directional transmission of 8/spl times/10 Gb/s DPSK signals over 80 km of SMF-28 fiber using in-line semiconductor optical amplifier

An error-free DPSK DWDM bi-directional transmission of 8/spl times/10 Gb/s signals using an in-line SOA over 80 km SMF-28 with matching DCF is demonstrated. The results suggest promising application for bi-directional transmission in metro and access network with simple configuration and low cost.

Interleaved Bidirectional Transmission of 16

We have performed both experimental and numerical analyses of interleaved bidirectional transmission of 16 times 10-Gb/s dense-wavelength-division-multiplexed (DWDM) signals using differential-phase-shift-keying (DPSK) modulation format and in-line semiconductor optical amplifiers (SOAs). The constant intensity of DPSK-modulated DWDM signals enabled us to mitigate the crosstalk effects in the bidirectional SOA. We have demonstrated error-free bidirectional transmission of 16 channels over an 80-km single-mode fiber (SMF) with matching dispersion-compensating fiber and in-line amplification provided by an SOA. SOAs can be used for bidirectional transmission if the facet reflections can be controlled. In order to understand further the effect of the SOA facet reflectivity on transmission results, we developed a simulation model for our system. Based on the good agreement between our simulation and experimental results, we have found out that the system reflections can be minimized by careful optimization of the bias current and reflectivity of the SOA

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We have analysed the sources of reflections in interleaved bi-directional DWDM SOA transmission. We have numerically and experimentally demonstrated the reduction of reflections by reducing both the SOA bias current and facet reflectivities

10-Gb/s DWDM Signals Using DPSK Modulation Format and In-line Semiconductor Optical Amplifiers

We propose and demonstrate a flexible, scalable and high capacity multistage LAD architecture for PONs which provides WDM traffic in both directions. Its fully symmetric operating at 2.5 Gbps and capable of broadcasting complete video band.