Narrowband optical filtering and chromatic dispersion are two important issues that
affect optical fiber transmission performance. Recent technological developments in
high-speed digital signal processors, digital-to-analog converters and analog-to-digital
converters have enabled the implementation of electronic signal processing (ESP) in
optical transmission systems leading to adaptive and cost efficient integrated solutions.
This thesis focuses on applying ESP at the transmitter to pre-compensate for
narrowband optical filtering and chromatic dispersion.
A novel electronic pre-compensation approach was proposed to deal with narrowband
optical filtering. The effectiveness was demonstrated by a straight-line experiment
and a recirculating loop experiment for 10 Gb/s non-return-to-zero on-off-keying
(NRZ-OOK). Moreover, the work was extended to NRZ differential-phase-shift-keying
as well as 20 Gb/s NRZ differential-quadrature-phase-shift-keying. Experimental results
demonstrate that electronic pre-compensation effectively reduces the degradation
in system performance induced by narrowband optical filtering.
Electronic dispersion pre-compensation was investigated using a semiconductor
InP Mach-Zehnder modulator (MZM) for the NRZ-OOK modulation format at 10.709
Gb/s aiming at providing a cost efficient implementation for core and metro transmission
networks. A brute-force method was developed to determine the requisite drive
i
voltages due to the nonlinear voltage dependent attenuation and phase constants
of the InP MZM. The transmission results for the recirculating loop and straightline
experiments demonstrate that an InP MZM provides comparable dispersion precompensation
performance with a conventional LiNbO3 MZM. Use of the NRZ-OOK
modulation format and InP MZM provides a simple and cost-efficient solution for
core and metro transmission network.
Dispersion pre-compensation was also performed for a 85.672 Gb/s polarization
multiplexed 16-ary quadrature amplitude modulation (PM-16QAM) modulation format
with digital coherent detection and offline digital signal processing. The transmitter
was characterized to ensure the quality of the 16QAM signal generation. Simulation
results indicate the impact of the modulator bias voltage error on system performance.
Recirculating loop experimental results demonstrate that the performance of
dispersion pre-compensation is comparable with dispersion post-compensation, thus
providing the possibility to combine dispersion pre- and post-compensation for PM-
16QAM coherent transmission for further performance improvement. / Thesis (Ph.D, Electrical & Computer Engineering) -- Queen's University, 2011-10-29 13:01:01.347
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:OKQ.1974/6856 |
| Date | 02 November 2011 |
| Creators | JIANG, YING |
| Contributors | Queen's University (Kingston, Ont.). Theses (Queen's University (Kingston, Ont.)) |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English, English |
| Detected Language | English |
| Type | Thesis |
| Rights | This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner. |
| Relation | Canadian theses |
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