Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7924517 | Optics Communications | 2018 | 9 Pages |
Abstract
Making use of Hilbert-pair-based digital filtering, intensity modulation and passive optical coupling, optical filter- and O-E-O conversion-free flexible ROADMs are, for the first time, experimentally demonstrated to perform DSP-enabled dynamic add/drop operations at wavelength, sub-wavelength and spectrally overlapped sub-band levels. Extensive experimental explorations of physical-layer add/drop operation performances and their robustness to variations in both differential optical power dynamic range and drop RF signal power are also undertaken in IMDD-based optical network nodes. It is shown that the ROADM add/drop operation performances are independent of the sub-band spectral location, and that the add/drop operations introduce optical power penalties of ⤠1.8 dB. In addition, for a total optical power as low as â12 dBm, the add operation still can tolerate a differential optical power dynamic range of > 2 dB. Whilst for the drop operation, an optical power penalty of < 2 dB is observed over a drop RF signal power variation range of 7.1 dB. Experimental results indicate that the add/drop operations of DSP-switched ROADMs have excellent performance robustness to considerably relax stringent requirements on network components.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
M.L. Deng, X. Duan, W. Jin, R.P. Giddings, S. Mansoor, J.M. Tang,