Fast and robust chromatic dispersion estimation based on temporal auto-correlation after digital spectrum superposition
Journal article, 2015
We investigate and experimentally demonstrate a fast and robust chromatic dispersion (CD) estimation method based on temporal auto-correlation after digital spectrum superposition. The estimation process is fast, because neither tentative CD scanning based on CD compensation nor specific cost function calculations are used. Meanwhile, the proposed CD estimation method is robust against polarization mode dispersion (PMD), amplified spontaneous emission (ASE) noise and fiber nonlinearity. Furthermore, the proposed CD estimation method can be used for various modulation formats and digital pulse shaping technique. Only 4096 samples are necessary for CD estimation of single carrier either 112 Gbps DP-QPSK or 224 Gbps DP-16QAM signal with various pulse shapes. 8192 samples are sufficient for the root-raised-cosine pulse with roll-off factor of 0.1. As low as 50 ps/nm standard deviation together with a worst estimation error of about 160 ps/nm is experimentally obtained for 7 x 112 Gbps DP-QPSK WDM signal after the transmission through 480 km to 9120 km single mode fiber (SMF) loop using different launch powers.
Author
SC Yao
Huazhong University of Science and Technology
Wuhan National Laboratory for Optoelectronics
Tobias Eriksson
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
S Fu
Huazhong University of Science and Technology
Wuhan National Laboratory for Optoelectronics
Pontus Johannisson
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
Magnus Karlsson
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
Peter Andrekson
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
T Ming
Wuhan National Laboratory for Optoelectronics
Huazhong University of Science and Technology
DM Liu
Huazhong University of Science and Technology
Optics Express
1094-4087 (ISSN) 10944087 (eISSN)
Vol. 23 12 15418-15430Subject Categories
Atom and Molecular Physics and Optics
DOI
10.1364/OE.23.015418