Abstract

Utilizing Hilbert-pair-based digital filtering, intensity modulation and passive optical coupling, optical filter- and O-E-O conversion-free ROADMs with excellent flexibility, colorlessness, gridlessness, contentionlessness, adaptability, and transparency to physical-layer network characteristics are proposed and evaluated, for the first time, which offer DSP-enabled dynamic add/drop operations at wavelength, subwavelength, and orthogonal subband levels. Extensive numerical simulations are undertaken to explore the operation characteristics of the proposed ROADMs in IMDD-based optical network nodes. It is shown that the add/drop operation performance is independent of the signal's location in the digital filtering space. In addition, the results also indicate that the drop operation introduces negligible optical power penalties, while for the worst-case scenarios, optical power penalties induced by the add operation can be 3.5 dB. Furthermore, the impacts of key digital filter parameters and intensity modulation-associated drop RF signals on the ROADM add/drop performance are also investigated, based on which optimum ROADM design criteria are identified not only for effectively reducing the digital filter DSP complexity but also simultaneously improving the ROADM performance.

© 2015 IEEE

PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription