Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Department of Electronic and Information Engineering | en_US |
| dc.contributor.advisor | Lu, Chao (EIE) | en_US |
| dc.creator | Wu, Xiong | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/12491 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | en_US |
| dc.rights | All rights reserved | en_US |
| dc.title | Equalization techniques for short-reach optical fiber communication systems | en_US |
| dcterms.abstract | As the key enablers of optical fiber communication systems, the technologies of intensity modulation and direct detection (IM/DD) and in-phase and quadrature modulation and coherent detection (IQM/CohD) have been studied extensively in the past 40 years. | en_US |
| dcterms.abstract | Nowadays, CohD based systems have enabled transmission of up to 100 Tb/s over thousands of kilometers, using advanced signal processing techniques to mitigate various transmission impairments. However, for many applications such as inter-data center interconnections (DCIs), CohD is often too complex to be used. IM/DD is preferred due to its simplicity and low power consumption, but its performance is often limited by chromatic dispersion (CD) and limited component bandwidth. | en_US |
| dcterms.abstract | In order to meet the requirement of inter-DCIs, various solutions have been proposed. These include equalization algorithms in IM/DD systems at the transmitter and receiver, simplifying the structure and digital signal processing (DSP) in IQM/CohD systems, or realization of mode-division multiplexing (MDM) systems. However, significant research effort is still necessary to reach up to 100-km transmission at high data rate. | en_US |
| dcterms.abstract | In view of the above, this thesis focuses on two aspects of powerful equalization algorithms in IM/DD systems with up to 100-km standard single-mode fiber (SSMF) transmissions, and non-singular multi-user constant modulus algorithm (MU-CMA) equalization in mode-division multiplexing (MDM) system. The proposed schemes have been successfully realized experimentally and their dynamic performance has also been evaluated. The IM/DD schemes include iterative and non-iterative pre-electronic dispersion compensations (EDCs) based on the Gerchberg-Saxton algorithm (GSA) and small-signal analysis (SSA), low-complexity post-equalizers with weight sharing (WS), and the joint scheme of combined pulse shaping, nonlinear pre-distortion, and low-complexity post-equalizers. While the MDM scheme applies the proposed 4 x 4 multi-user constant modulus algorithm (MU-CMA) and Kramers–Kronig reception (KKR) to achieve the non-singular MDM transmission with four cylindrical vector (CV) modes and each mode carrying the high-order modulation format of 16-QAM. Overall, the works presented in the thesis shall provide potential solutions to realize short-reach optical fiber communication systems with high speed and good performance. | en_US |
| dcterms.extent | xxii, 151 pages : color illustrations | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 2023 | en_US |
| dcterms.educationalLevel | Ph.D. | en_US |
| dcterms.educationalLevel | All Doctorate | en_US |
| dcterms.LCSH | Optical fiber communication | en_US |
| dcterms.LCSH | Optical communications | en_US |
| dcterms.LCSH | Hong Kong Polytechnic University -- Dissertations | en_US |
| dcterms.accessRights | open access | en_US |
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