Dyadic Probabilistic Shaping of PAM-4 and PAM-8 for Cost-Effective VCSEL-MMF Optical Interconnection
In this paper, dyadic probabilistic shaping (PS) for pulse amplitude modulation (PAM) has been investigated and experimentally demonstrated for intensity-modulation and direct-detection optical interconnection systems. Improved achievable information rate can be obtained under the condition of limit...
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IEEE
2019-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8667637/ |
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| author | Lin Sun Chang Wang Jiangbing Du Chenyu Liang Wenjia Zhang Ke Xu Fan Zhang Zuyuan He |
| author_facet | Lin Sun Chang Wang Jiangbing Du Chenyu Liang Wenjia Zhang Ke Xu Fan Zhang Zuyuan He |
| author_sort | Lin Sun |
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| description | In this paper, dyadic probabilistic shaping (PS) for pulse amplitude modulation (PAM) has been investigated and experimentally demonstrated for intensity-modulation and direct-detection optical interconnection systems. Improved achievable information rate can be obtained under the condition of limited bandwidth and signal-to-noise ratio (SNR). Theoretical investigations of generalized mutual information have been performed. 0.61- and 1.74-dB SNR gains by dyadic PS can be obtained for PAM-4 and PAM-8, respectively, to achieve error free assuming optimal 20% FEC. Meanwhile, such fixed distributions can offer a considerably broad SNR range (10.3–16.7 dB for PAM-4 and 13.4–24.6 dB for PAM-8) with positive gain. Moreover, experimental investigations have been carried out over optical multimode fiber (MMF) links at 850 nm using a commercial-product-level vertical-cavity surface-emitting laser (VCSEL) chip. PAM-8 signaling by PS at the net rate of 75 Gb/s has been realized with 100-m OM3 fiber transmission. Energy efficient signaling can be achieved with up to 46% theoretical power reduction by PS. Experimentally, we obtained 16% reduction of optical power for the VCSEL-MMF optical link. The dyadic distribution of PS, due to its simplicity of coding, as well as considerable shaping gain and energy efficiency, is expected to be an opportune solution for the cost-sensitive short-reach scenarios. |
| format | Article |
| id | doaj-art-9d748db01cc048bdb5cdeecf52418de4 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | IEEE |
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| series | IEEE Photonics Journal |
| spelling | doaj-art-9d748db01cc048bdb5cdeecf52418de42025-08-20T03:32:50ZengIEEEIEEE Photonics Journal1943-06552019-01-0111211110.1109/JPHOT.2019.29050118667637Dyadic Probabilistic Shaping of PAM-4 and PAM-8 for Cost-Effective VCSEL-MMF Optical InterconnectionLin Sun0https://orcid.org/0000-0002-5725-180XChang Wang1Jiangbing Du2https://orcid.org/0000-0002-6333-824XChenyu Liang3https://orcid.org/0000-0002-5318-9412Wenjia Zhang4https://orcid.org/0000-0002-9545-1124Ke Xu5https://orcid.org/0000-0003-1935-8910Fan Zhang6https://orcid.org/0000-0001-6489-2480Zuyuan He7https://orcid.org/0000-0002-7499-834XState Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, ChinaDepartment of Electronic and Information Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, ChinaIn this paper, dyadic probabilistic shaping (PS) for pulse amplitude modulation (PAM) has been investigated and experimentally demonstrated for intensity-modulation and direct-detection optical interconnection systems. Improved achievable information rate can be obtained under the condition of limited bandwidth and signal-to-noise ratio (SNR). Theoretical investigations of generalized mutual information have been performed. 0.61- and 1.74-dB SNR gains by dyadic PS can be obtained for PAM-4 and PAM-8, respectively, to achieve error free assuming optimal 20% FEC. Meanwhile, such fixed distributions can offer a considerably broad SNR range (10.3–16.7 dB for PAM-4 and 13.4–24.6 dB for PAM-8) with positive gain. Moreover, experimental investigations have been carried out over optical multimode fiber (MMF) links at 850 nm using a commercial-product-level vertical-cavity surface-emitting laser (VCSEL) chip. PAM-8 signaling by PS at the net rate of 75 Gb/s has been realized with 100-m OM3 fiber transmission. Energy efficient signaling can be achieved with up to 46% theoretical power reduction by PS. Experimentally, we obtained 16% reduction of optical power for the VCSEL-MMF optical link. The dyadic distribution of PS, due to its simplicity of coding, as well as considerable shaping gain and energy efficiency, is expected to be an opportune solution for the cost-sensitive short-reach scenarios.https://ieeexplore.ieee.org/document/8667637/Optical interconnectsfiber optics systems |
| spellingShingle | Lin Sun Chang Wang Jiangbing Du Chenyu Liang Wenjia Zhang Ke Xu Fan Zhang Zuyuan He Dyadic Probabilistic Shaping of PAM-4 and PAM-8 for Cost-Effective VCSEL-MMF Optical Interconnection IEEE Photonics Journal Optical interconnects fiber optics systems |
| title | Dyadic Probabilistic Shaping of PAM-4 and PAM-8 for Cost-Effective VCSEL-MMF Optical Interconnection |
| title_full | Dyadic Probabilistic Shaping of PAM-4 and PAM-8 for Cost-Effective VCSEL-MMF Optical Interconnection |
| title_fullStr | Dyadic Probabilistic Shaping of PAM-4 and PAM-8 for Cost-Effective VCSEL-MMF Optical Interconnection |
| title_full_unstemmed | Dyadic Probabilistic Shaping of PAM-4 and PAM-8 for Cost-Effective VCSEL-MMF Optical Interconnection |
| title_short | Dyadic Probabilistic Shaping of PAM-4 and PAM-8 for Cost-Effective VCSEL-MMF Optical Interconnection |
| title_sort | dyadic probabilistic shaping of pam 4 and pam 8 for cost effective vcsel mmf optical interconnection |
| topic | Optical interconnects fiber optics systems |
| url | https://ieeexplore.ieee.org/document/8667637/ |
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