Journal article
Experimental Study on OSNR Requirements for Spectrum-Flexible Optical Networks
Department of Photonics Engineering, Technical University of Denmark1
Metro-Access and Short Range Systems, Department of Photonics Engineering, Technical University of Denmark2
Athens Information Technology3
Coding and Visual Communication, Department of Photonics Engineering, Technical University of Denmark4
Systems, Department of Photonics Engineering, Technical University of Denmark5
The flexibility and elasticity of the spectrum is an important topic today. As the capacity of deployed fiber-optic systems is becoming scarce, it is vital to shift towards solutions ensuring higher spectral efficiency. Working in this direction, we report an extensive experimental study on adaptive allocation of superchannels in spectrum-flexible heterogeneous optical network.
In total, three superchannels were transmitted. Two 5-subcarrier 14-GHz-spaced, 14 Gbaud, polarization-division-multiplexed (PDM) quadrature-phase-shift-keyed (QPSK) superchannels were separated by a spectral gap, the band of interest (BOI). The bandwidth of the BOI was varied. The BOI was subsequently filled with another superchannel, constituted by a different number of either 14 Gbaud PDM-QPSK or PDM-16-ary quadrature amplitude modulation (16-QAM) subcarriers.
The optical signal-to-noise ratio (OSNR) for transmission of the subcarriers inserted into the BOI, depending on the modulation format, subcarrier count and spacing to the neighboring superchannels, was extracted through experimental implementation of different scenarios. The obtained values were interpolated to yield the required OSNR necessary to maintain a 1×10−3 bit error rate of the central BOI subcarrier.
The results provide a rule of thumb that can be exploited in resource allocation mechanisms of future spectrum-flexible optical networks.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2012 |
| Pages: | B85-B93 |
| Proceedings: | 2012 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference |
| ISSN: | 19430639 and 19430620 |
| Types: | Journal article |
| DOI: | 10.1364/JOCN.4.000B85 |
| ORCIDs: | Borkowski, Robert , Zibar, Darko and Tafur Monroy, Idelfonso |
Coherent detection Elastic optical networking Flexible optical networking Optical networking Optical transmission
Adaptive optics BOI OSNR Optical modulation Optical polarization Optical transmitters PDM Phase shift keying QPSK Signal to noise ratio adaptive superchannel allocation band of interest bit error rate channel allocation channel capacity channel spacing elasticity error statistics fiber-optic systems flexibility frequency 14 GHz modulation format multiplexing optical fibre networks optical modulation polarization-division-multiplexing quadrature amplitude modulation quadrature phase shift keying quadrature-phase-shift-keying resource allocation resource allocation mechanisms spectrum-flexible heterogeneous optical network superchannel spacing
