Enhanced Spurious-Free Dynamic Range in Intensity-Modulated Analog Photonic Link Using Digital Postprocessing
In this paper, a post digital linearization technique is proposed and demonstrated for a conventional intensity-modulation direct-detection analog photonic link. Instead of precisely emulating the transfer function of the whole nonlinear system in the digital domain, the key distortion information i...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2014-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/6748005/ |
| _version_ | 1797243469389889536 |
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| author | Yan Cui Yitang Dai Feifei Yin Qiang Lv Jianqiang Li Kun Xu Jintong Lin |
| author_facet | Yan Cui Yitang Dai Feifei Yin Qiang Lv Jianqiang Li Kun Xu Jintong Lin |
| author_sort | Yan Cui |
| collection | DOAJ |
| description | In this paper, a post digital linearization technique is proposed and demonstrated for a conventional intensity-modulation direct-detection analog photonic link. Instead of precisely emulating the transfer function of the whole nonlinear system in the digital domain, the key distortion information is directly acquired from hardware. By low biasing the Mach–Zehnder modulator, linearization can be achieved through simply multiplying the distorted signal by the coreceived low-pass band. Theory analysis shows that only the bias angle should be known by the algorithm, whereas the simulation shows adequate tolerance. The low bias angle also results in an improved link gain. The experiment shows a well-suppressed third-order intermodulation distortion (IMD3). With the optical down conversion, we demonstrate a spurious-free dynamic range increasing from 103.2 to 123.3 dB in a 1-Hz bandwidth. |
| first_indexed | 2024-04-24T18:55:37Z |
| format | Article |
| id | doaj.art-cde50ceecbf94cd1bc64896937a86c57 |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-04-24T18:55:37Z |
| publishDate | 2014-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-cde50ceecbf94cd1bc64896937a86c572024-03-26T17:41:57ZengIEEEIEEE Photonics Journal1943-06552014-01-01621810.1109/JPHOT.2014.23081966748005Enhanced Spurious-Free Dynamic Range in Intensity-Modulated Analog Photonic Link Using Digital PostprocessingYan Cui0Yitang Dai1Feifei Yin2Qiang Lv3Jianqiang Li4Kun Xu5Jintong Lin6<formula formulatype="inline"><tex Notation="TeX">$^{1}$</tex></formula> State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, ChinaState Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, ChinaState Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, China<formula formulatype="inline"><tex Notation="TeX">$^{2}$</tex></formula>The 54th Research Institute of CETC , Shijiazhuang, ChinaState Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications , Beijing, ChinaState Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications , Beijing, ChinaState Key Laboratory of Information Photonics and Optical Communications , Beijing University of Posts and Telecommunications, Beijing, ChinaIn this paper, a post digital linearization technique is proposed and demonstrated for a conventional intensity-modulation direct-detection analog photonic link. Instead of precisely emulating the transfer function of the whole nonlinear system in the digital domain, the key distortion information is directly acquired from hardware. By low biasing the Mach–Zehnder modulator, linearization can be achieved through simply multiplying the distorted signal by the coreceived low-pass band. Theory analysis shows that only the bias angle should be known by the algorithm, whereas the simulation shows adequate tolerance. The low bias angle also results in an improved link gain. The experiment shows a well-suppressed third-order intermodulation distortion (IMD3). With the optical down conversion, we demonstrate a spurious-free dynamic range increasing from 103.2 to 123.3 dB in a 1-Hz bandwidth.https://ieeexplore.ieee.org/document/6748005/Radio frequency photonicsfiber optics systemsdigital signal processing |
| spellingShingle | Yan Cui Yitang Dai Feifei Yin Qiang Lv Jianqiang Li Kun Xu Jintong Lin Enhanced Spurious-Free Dynamic Range in Intensity-Modulated Analog Photonic Link Using Digital Postprocessing IEEE Photonics Journal Radio frequency photonics fiber optics systems digital signal processing |
| title | Enhanced Spurious-Free Dynamic Range in Intensity-Modulated Analog Photonic Link Using Digital Postprocessing |
| title_full | Enhanced Spurious-Free Dynamic Range in Intensity-Modulated Analog Photonic Link Using Digital Postprocessing |
| title_fullStr | Enhanced Spurious-Free Dynamic Range in Intensity-Modulated Analog Photonic Link Using Digital Postprocessing |
| title_full_unstemmed | Enhanced Spurious-Free Dynamic Range in Intensity-Modulated Analog Photonic Link Using Digital Postprocessing |
| title_short | Enhanced Spurious-Free Dynamic Range in Intensity-Modulated Analog Photonic Link Using Digital Postprocessing |
| title_sort | enhanced spurious free dynamic range in intensity modulated analog photonic link using digital postprocessing |
| topic | Radio frequency photonics fiber optics systems digital signal processing |
| url | https://ieeexplore.ieee.org/document/6748005/ |
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