Numerical Analysis of Dither Induced Penalty for Automatic Bias Control Methods
The Mach-Zehnder modulator (MZM) is widely used in high-speed optical communication, and the stability of its bias point is the key to maintain the performance of the communication system. Numerous automatic bias control methods have been proposed to stabilize the bias point, which can be classified...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2024-01-01
|
| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10342635/ |
| _version_ | 1797370493385310208 |
|---|---|
| author | Jinyang Wu Linsheng Zhong Xiaoxiao Dai Qi Yang Mengfan Cheng Lei Deng Deming Liu |
| author_facet | Jinyang Wu Linsheng Zhong Xiaoxiao Dai Qi Yang Mengfan Cheng Lei Deng Deming Liu |
| author_sort | Jinyang Wu |
| collection | DOAJ |
| description | The Mach-Zehnder modulator (MZM) is widely used in high-speed optical communication, and the stability of its bias point is the key to maintain the performance of the communication system. Numerous automatic bias control methods have been proposed to stabilize the bias point, which can be classified into power-based and dither-based methods. The power-based method features low-complexity and is considered of low-precision, thus it is usually applied to low-order modulation. In contrast, dither-based method features high-complexity and is considered of high-precision, therefore it is usually applied to high-order modulation. This paper explores the bias impact mechanism and analyzes the impact of the bias and dither signal. Traditional view is that the performance of dither-based outperforms power-based ones. However, the impact of dither is ignored. Here we compare the performance of the power-based and dither-based method under fair conditions. The results show that the power-based method has higher SNR and better performance taking into account the impact of dither, which indicates that practically it is more suitable for high-order modulation. |
| first_indexed | 2024-03-08T18:03:20Z |
| format | Article |
| id | doaj.art-5b4eaa5ba3764f779d64d6ba3051678c |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-03-08T18:03:20Z |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-5b4eaa5ba3764f779d64d6ba3051678c2024-01-02T00:00:28ZengIEEEIEEE Photonics Journal1943-06552024-01-011611910.1109/JPHOT.2023.333861710342635Numerical Analysis of Dither Induced Penalty for Automatic Bias Control MethodsJinyang Wu0https://orcid.org/0009-0003-2765-4741Linsheng Zhong1https://orcid.org/0000-0002-5737-499XXiaoxiao Dai2https://orcid.org/0000-0003-3408-7493Qi Yang3https://orcid.org/0000-0001-9017-6971Mengfan Cheng4https://orcid.org/0000-0002-8221-0612Lei Deng5https://orcid.org/0000-0003-2647-4610Deming Liu6https://orcid.org/0000-0001-5591-2929School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaSchool of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaSchool of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaSchool of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaSchool of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaSchool of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaSchool of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaThe Mach-Zehnder modulator (MZM) is widely used in high-speed optical communication, and the stability of its bias point is the key to maintain the performance of the communication system. Numerous automatic bias control methods have been proposed to stabilize the bias point, which can be classified into power-based and dither-based methods. The power-based method features low-complexity and is considered of low-precision, thus it is usually applied to low-order modulation. In contrast, dither-based method features high-complexity and is considered of high-precision, therefore it is usually applied to high-order modulation. This paper explores the bias impact mechanism and analyzes the impact of the bias and dither signal. Traditional view is that the performance of dither-based outperforms power-based ones. However, the impact of dither is ignored. Here we compare the performance of the power-based and dither-based method under fair conditions. The results show that the power-based method has higher SNR and better performance taking into account the impact of dither, which indicates that practically it is more suitable for high-order modulation.https://ieeexplore.ieee.org/document/10342635/Bias controlMZMcoherent communication |
| spellingShingle | Jinyang Wu Linsheng Zhong Xiaoxiao Dai Qi Yang Mengfan Cheng Lei Deng Deming Liu Numerical Analysis of Dither Induced Penalty for Automatic Bias Control Methods IEEE Photonics Journal Bias control MZM coherent communication |
| title | Numerical Analysis of Dither Induced Penalty for Automatic Bias Control Methods |
| title_full | Numerical Analysis of Dither Induced Penalty for Automatic Bias Control Methods |
| title_fullStr | Numerical Analysis of Dither Induced Penalty for Automatic Bias Control Methods |
| title_full_unstemmed | Numerical Analysis of Dither Induced Penalty for Automatic Bias Control Methods |
| title_short | Numerical Analysis of Dither Induced Penalty for Automatic Bias Control Methods |
| title_sort | numerical analysis of dither induced penalty for automatic bias control methods |
| topic | Bias control MZM coherent communication |
| url | https://ieeexplore.ieee.org/document/10342635/ |
| work_keys_str_mv | AT jinyangwu numericalanalysisofditherinducedpenaltyforautomaticbiascontrolmethods AT linshengzhong numericalanalysisofditherinducedpenaltyforautomaticbiascontrolmethods AT xiaoxiaodai numericalanalysisofditherinducedpenaltyforautomaticbiascontrolmethods AT qiyang numericalanalysisofditherinducedpenaltyforautomaticbiascontrolmethods AT mengfancheng numericalanalysisofditherinducedpenaltyforautomaticbiascontrolmethods AT leideng numericalanalysisofditherinducedpenaltyforautomaticbiascontrolmethods AT demingliu numericalanalysisofditherinducedpenaltyforautomaticbiascontrolmethods |