TY - JOUR
T1 - Improved performance robustness of DSP-enabled flexible ROADMs free from optical filters and O-E-O conversions
AU - Jin, W.
AU - Zhang, C.
AU - Duan, X.
AU - Kadhum, M.R.
AU - Dong, Y.X.
AU - Giddings, R.P.
AU - Jiang, N.
AU - Qiu, K.
AU - Tang, J.M.
PY - 2016/7/11
Y1 - 2016/7/11
N2 - Utilizing Hilbert-pair-based digital filtering, intensity modulation, and passive optical coupling, digital signal processing (DSP) enabled flexible reconfigurable optical add/drop multiplexers (ROADMs) are reported, which are free from optical filters and optical-electrical-optical (O-E-O) conversions and offer excellent flexibility, color-lessness, gridlessness, contentionlessness, adaptability, and transparency to physical-layer network characteristics. In this paper, the ROADM performance robustness against variations in numerous network design aspects is, for the first time to the best of our knowledge, extensively explored in intensity-modulation- and direct-detection-based optical network nodes. Numerical results show that DSPs not only enable the ROADMs to dynamically and flexibly perform add/drop operations at wavelength, subwavelength, and spectrally overlapped orthogonal subband levels but also considerably improve the ROADM performance robustness against variations in modulation formats, transmission system characteristics/impairments, and terminal equipment configurations.
AB - Utilizing Hilbert-pair-based digital filtering, intensity modulation, and passive optical coupling, digital signal processing (DSP) enabled flexible reconfigurable optical add/drop multiplexers (ROADMs) are reported, which are free from optical filters and optical-electrical-optical (O-E-O) conversions and offer excellent flexibility, color-lessness, gridlessness, contentionlessness, adaptability, and transparency to physical-layer network characteristics. In this paper, the ROADM performance robustness against variations in numerous network design aspects is, for the first time to the best of our knowledge, extensively explored in intensity-modulation- and direct-detection-based optical network nodes. Numerical results show that DSPs not only enable the ROADMs to dynamically and flexibly perform add/drop operations at wavelength, subwavelength, and spectrally overlapped orthogonal subband levels but also considerably improve the ROADM performance robustness against variations in modulation formats, transmission system characteristics/impairments, and terminal equipment configurations.
KW - Digital filtering
KW - digital signal processing (DSP)
KW - intensity modulation
KW - reconfigurable optical add/drop multiplexer (ROADM
KW - performance robustness
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-84980348178&partnerID=MN8TOARS
UR - https://ieeexplore.ieee.org/document/7541912
U2 - 10.1364/JOCN.8.000521
DO - 10.1364/JOCN.8.000521
M3 - Article
SN - 1943-0620
VL - 8
SP - 521
EP - 529
JO - Journal of Optical Communications and Networking
JF - Journal of Optical Communications and Networking
IS - 8
ER -