Performance of an optical equalizer in a 10 G wavelength converting optical access network.

A centralized optical processing unit (COPU) that functions both as a wavelength converter (WC) and optical burst equaliser in a 10 Gb/s wavelength-converting optical access network is proposed and experimentally characterized. This COPU is designed to consolidate drifting wavelengths generated with an uncooled laser in the upstream direction into a stable wavelength channel for WDM backhaul transmission and to equalize the optical loud/soft burst power in order to relax the burst-mode receiver dynamic range requirement. The COPU consists of an optical power equaliser composed of two cascaded SOAs followed by a WC. Using an optical packet generator and a DC-coupled PIN-based digital burst-mode receiver, the COPU is characterized in terms of payload-BER for back-to-back and backhaul transmission distances of 22, 40, and 62 km. We show that there is a compromise between the receiver sensitivity and overload points that can be optimized tuning the WC operating point for a particular backhaul fiber transmission distance. Using the optimized settings, sensitivities of -30.94, -30.17, and -27.26 dBm with overloads of -9.3, -5, and >-5 dBm were demonstrated for backhaul transmission distances of 22, 40 and 62 km, respectively.

[1]  K. Yamaguchi,et al.  Smart optical receiver with automatic decision threshold setting and retiming phase alignment , 1989 .

[2]  K. Nishimura,et al.  All-optical multi-wavelength conversion of 10 Gbit/s NRZ/RZ signals based on SOA-MZI for WDM multicasting , 2005 .

[3]  J. E. Mitchell,et al.  Wavelength converting optical access network for 10Gbit/s PON , 2011, 15th International Conference on Optical Network Design and Modeling - ONDM 2011.

[4]  Lars Erup,et al.  Interpolation in digital modems. II. Implementation and performance , 1993, IEEE Trans. Commun..

[5]  Polina Bayvel,et al.  Digital dual-rate burst-mode receiver for 10G and 1G coexistence in optical access networks. , 2011, Optics express.

[6]  T. Durhuus,et al.  All optical wavelength conversion by SOA's in a Mach-Zehnder configuration , 1994, IEEE Photonics Technology Letters.

[7]  John E. Mitchell,et al.  Architecture to integrate multiple PONs with long reach DWDM backhaul , 2009, IEEE Journal on Selected Areas in Communications.

[8]  S. L. Danielsen,et al.  All optical wavelength conversion schemes for increased input power dynamic range , 1998, IEEE Photonics Technology Letters.

[9]  J.P.R. Lacey,et al.  All-optical 1300-nm to 1550-nm wavelength conversion using cross-phase modulation in a semiconductor optical amplifier , 1996, IEEE Photonics Technology Letters.

[10]  Tatsuo Hatta,et al.  Polarization-Insensitive SOA-MZI Monolithic All-Optical Wavelength Converter for Full C-band 40Gbps-NRZ Operation , 2006, 2006 European Conference on Optical Communications.

[11]  John E. Mitchell,et al.  Long-Reach Optical Access Technologies , 2007, IEEE Network.