We present experimental results for wavelength-division multiplexed (WDM) transmission performance using unbalanced proportions of 1s and 0s in pseudo-random bit sequence (PRBS) data. This investigation simulates the effect of local, in time, data unbalancing which occurs in some coding systems such as forward error correction when extra bits are added to the WDM data stream. We show that such local unbalancing, which would practically give a time-dependent error-rate, can be employed to improve the legacy long-haul WDM system performance if the system is allowed to operate in the nonlinear power region. We use a recirculating loop to simulate a long-haul fibre system.
Bibliographical noteThis is an Accepted Manuscript of an article published by Taylor & Francis in IETE Journal of Research on 4/4/16, available online: http://www.tandfonline.com/10.1080/03772063.2016.1160803
- long-haul undersea systems
- optical fibre networks
- submarine cable networks
- WDM systems