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Learnable digital signal processing:a new benchmark of linearity compensation for optical fiber communications

Light(Science & Applications) 2024年第9期13卷 1931-1943页

作者： Zekun Niu Hang Yang Lyu Li Minghui Shi Guozhi Xu weisheng hu Lilin Yi State Key Lab of Advanced Optical Communication Systems and Networks School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240PR China

The surge in interest regarding the next generation of optical fiber transmission has stimulated the development of digital signal processing(DSP)schemes that are highly cost-effective with both high performance and low *** benchmarks for nonlinear compensation methods,however,traditional DSP designed with block-by-block modules for linear compensations,could exhibit residual linear effects after compensation,limiting the nonlinear compensation *** we propose a high-efficient design thought for DSP based on the learnable perspectivity,called learnable DSP(LDSP).LDSP reuses the traditional DSP modules,regarding the whole DSP as a deep learning framework and optimizing the DSP parameters adaptively based on backpropagation algorithm from a global *** method not only establishes new standards in linear DSP performance but also serves as a critical benchmark for nonlinear DSP *** comparison to traditional DSP with hyperparameter optimization,a notable enhancement of approximately 1.21 dB in the Q factor for 400 Gb/s signal after 1600 km fiber transmission is experimentally demonstrated by combining LDSP and perturbation-based nonlinear compensation *** from the learnable model,LDSP can learn the best configuration adaptively with low complexity,reducing dependence on initial *** proposed approach implements a symbol-rate DSP with a small bit error rate(BER)cost in exchange for a 48%complexity reduction compared to the conventional 2 samples/symbol *** believe that LDSP represents a new and highly efficient paradigm for DSP design,which is poised to attract considerable attention across various domains of optical communications.

关键词： fiber signal optical

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Four-dimensional direct detection receiver enabling Jones-space field recovery with phase and polarization diversity

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Photonics Research 2024年第3期12卷 399-410页

作者： QI WU YIXIAO Zhu XUEYANG LI HEXUN JIANG CHEN CHENG MENGFAN FU YIKUN ZHANG QUNBI ZhuGE ZHAOhuI LI weisheng hu Peng Cheng Laboratory Shenzhen 518055China State Key Laboratory of Advanced Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China School of Electronics and Information Technology and Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems Sun Yat-sen UniversityGuangzhou 510006China

Data centers,the engines of the global Internet,rely on powerful high-speed optical *** optical fiber communication,classic direct detection captures only the intensity of the optical field,while the coherent detection counterpart utilizes both phase and polarization diversities at the expense of requiring a narrow-linewidth and high-stability local oscillator(LO).Herein,we propose and demonstrate a four-dimensional Jones-space optical field recovery(4-D JSFR)scheme without an *** polarization-diverse full-field receiver structure captures information encoded in the intensity and phase of both polarizations,which can be subsequently extracted *** our knowledge,our proposed receiver achieves the highest electrical spectral efficiency among existing direct detection systems and potentially provides similar electrical spectral efficiency as standard intradyne coherent detection *** fully recovered optical field extends the transmission distance beyond the limitations imposed by fiber chromatic ***,the LO-free advantage makes 4-D JSFR suitable for photonic integration,offering a spectrally efficient and cost-effective solution for massively parallel data center *** results may contribute to the ongoing developments in the theory of optical field recovery and the potential design considerations for future high-speed optical transceivers.

关键词： polarization receiver phase

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Digital twin modeling and controlling of optical power evolution enabling autonomous-driving optical networks: a Bayesian approach

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Advanced Photonics 2024年第2期6卷 69-80页

作者： Xiaomin Liu Yihao Zhang Yuli Chen Yichen Liu Meng Cai Qizhi Qiu Mengfan Fu Lilin Yi weisheng hu Qunbi Zhuge Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication Systems and NetworksDepartment of Electronic Engineering

Optical networks are evolving toward ultrawide bandwidth and autonomous operation. In this scenario, it is crucial to accurately model and control optical power evolutions(OPEs) through optical amplifiers(OAs), as they directly affect the signal-to-noise ratio and fiber nonlinearities. However, a fundamental contradiction arises between the complex physical phenomena in optical transmission and the required precision in network control. Traditional theoretical methods underperform due to ideal assumptions, while data-driven approaches entail exorbitant costs associated with acquiring massive amounts of data to achieve the desired level of accuracy. In this work, we propose a Bayesian inference framework(BIF) to construct the digital twin of OAs and control OPE in a data-efficient manner. Only the informative data are collected to balance the exploration and exploitation of the data space, thus enabling efficient autonomous-driving optical networks(ADONs). Simulations and experiments demonstrate that the BIF can reduce the data size for modeling erbium-doped fiber amplifiers by 80% and Raman amplifiers by 60%. Within 30 iterations, the optimal controlling performance can be achieved to realize target signal/gain profiles in links with different types of OAs. The results show that the BIF paves the way to accurately model and control OPE for future ADONs.

关键词： optical fiber communications digital twin Bayesian inference optical amplifiers autonomous-driving optical networks

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Automatic mode-locking fiber lasers: progress and perspectives

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Science China(Information Sciences) 2020年第6期63卷 119-142页

作者： Guoqing PU Li ZHANG weisheng hu Lilin YI State Key Lab of Advanced Communication Systems and Networks Shanghai Institute for Advanced Communication and Data Science Shanghai Jiao Tong University

Polarization control in nonlinear polarization rotation based mode-locked fiber lasers is a longterm challenge. Suffering from the polarization drifts induced by environmental disturbances, nonlinear polarization rotation based mode-locked fiber lasers is difficult in continuously operating under the desired pulsation regime thereby substantially hindering their utilizations. The appearance of automatic modelocking techniques brings the light in addressing this challenge. Combining with various algorithms and electrical polarization control, automatic mode-locking techniques resolve the dilemma of nonlinear polarization rotation based mode-locked fiber lasers. We review the research progress of automatic mode-locking techniques in detail. Furthermore, we comment on the perspectives and potential applications of automatic mode-locking techniques.

关键词： nonlinear polarization rotation ultrashort pulses automatic mode-locking electrical polarization control optimization algorithms machine learning time stretch

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Wavelength dimensioning for wavelength-routed WDM satellite network

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Chinese Journal of Aeronautics 2016年第3期29卷 763-771页

作者： Liu Zhe Guo Wei Deng Changlin hu weisheng State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University

Internet and broadband applications driven by data traffic demand have become key dri- vers for satellite constellations. The key technology to satisfy the high capacity requirements between satellites is optical satellite networks by means of wavelength division multiplexing inter- satellite links （ISLs） with wavelength routing （WDM-OSN）. Due to the limited optical amplifier bandwidth onboard the satellite, it is important to minimize the wavelength requirements to provi- sion requests. However, ISLs should be dynamically established and deleted for each satellite according to its visible satellites. Furthermore, different link assignments will result in different topologies, hence yielding different routings and wavelength assignments. Thus, a perfect match model-based link assignment scheme （LAS-PMM） is proposed to design an appropriate topology such that shorter path could be routed and less wavelengths could be assigned for each ISL along the path. Finally, simulation results show that in comparison to the regular Manhattan street net- work （MSN） topology, wavelength requirements and average end-to-end delay based on the topol- ogy generated by LAS-PMM could be reduced by 24.8% and 12.4%, respectively.

关键词： LAS LAS-PMM Routing Wavelength assignment Wavelength dimensioning WDM-OSN

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从“阳明脉衰”探讨补益阳明防治围绝经期脱发

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中国医药科学 2024年第5期14卷 94-97页

作者：高俊松胡炜圣张苗福建中医药大学中医学院福建福州350122 福建中医药大学附属第二人民医院福建福州350001 福建中医药大学针灸学院福建福州350122

《素问·上古天真论》言“女子五七,阳明脉衰……发始堕”,可见“发始堕”是“阳明脉衰”的表现之一。“阳明脉衰”导致的脱发相当于现代医学的围绝经期脱发,卵巢功能减退是女性进入围绝经期的主要原因,围绝经期特殊生理内环境又影响头... 详细信息

《素问·上古天真论》言“女子五七,阳明脉衰……发始堕”,可见“发始堕”是“阳明脉衰”的表现之一。“阳明脉衰”导致的脱发相当于现代医学的围绝经期脱发,卵巢功能减退是女性进入围绝经期的主要原因,围绝经期特殊生理内环境又影响头发的脱落,可见“阳明脉衰”与围绝经期脱发有着密切联系。本文基于“阳明脉衰”的理论,分析围绝经期的生理内环境对毛发脱落的影响,探讨“阳明脉衰”与围绝经期相关启动因素之间的关联,总结了补益阳明影响毛发生长的相关通路,延缓卵巢衰老和防治围绝经期脱发的可行性,提出以“五七”为基点,适时补益阳明津气,可以未老先防,既老防衰,达到发衰而不堕,防治围绝经期脱发的目的。

关键词：阳明脉衰围绝经期脱发卵巢衰老补益阳明津气 Wnt/β-catenin信号通路 TGF-β

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从“邪伏三焦募原”理论辨治丹毒理论探骊

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亚太传统医药 2024年第2期20卷 203-206页

作者：叶铭达胡炜圣魏开建福建中医药大学附属第二人民医院福建福州350001

伏邪理论是基于五运六气哲学思维框架发展而来的理论,“邪伏募原”的三焦传变规律是形成于伏邪理论基础上的临证思辨的方式和手段,也是丹毒辨证论治的重要思维逻辑。基于伏邪产生及其发展的“五运六气”背景,提出了邪伏募原是伏邪所伏... 详细信息

伏邪理论是基于五运六气哲学思维框架发展而来的理论,“邪伏募原”的三焦传变规律是形成于伏邪理论基础上的临证思辨的方式和手段,也是丹毒辨证论治的重要思维逻辑。基于伏邪产生及其发展的“五运六气”背景,提出了邪伏募原是伏邪所伏位置的病理基础,三焦传变是伏邪传变途径的观点。基于五运六气理论与丹毒发病的相关性,认为“邪伏三焦募原”是丹毒的病因病机,提出伏邪丹毒治疗应以重视运气、扶正透邪、开达募原为论治总纲,以期为丹毒中医临床治疗提供新思路。

关键词：丹毒运气学说伏邪三焦辨证

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优选复方加味脂桂酊联合自然光照治疗银屑病样皮损的配伍方案

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世界临床药物 2024年第8期45卷 821-828页

作者：翁慧兰胡炜圣钟长鸣黄宁福建中医药大学附属第二人民医院皮肤科福建福州350003 福建中医药大学附属第二人民医院中西医结合皮肤病福建省高校重点实验室福建福州350003

目的优选复方加味脂桂酊联合自然光照治疗咪喹莫特诱导小鼠银屑病样皮损模型的配伍方案。方法将复方加味脂桂酊通过药物正交配伍生成不同配伍方案复方加味脂桂酊组,分别以S1~S9表示。通过评价干预后小鼠银屑病皮损及严重程度指数(psor... 详细信息

目的优选复方加味脂桂酊联合自然光照治疗咪喹莫特诱导小鼠银屑病样皮损模型的配伍方案。方法将复方加味脂桂酊通过药物正交配伍生成不同配伍方案复方加味脂桂酊组,分别以S1~S9表示。通过评价干预后小鼠银屑病皮损及严重程度指数(psoriasis area and severity index,PASI)评分、皮肤组织病理切片中表皮厚度改变情况以及组织白介素(interleukin,IL)-23、IL-17变化,同时确定复方加味脂桂酊联合自然光照的最佳配伍方案。结果与银屑病模型光照(M)组相比,D14复方加味脂桂酊干预组小鼠皮损红斑色浅,鳞屑稀少,增厚现象较轻。复方加味脂桂酊干预组表皮增厚程度均显著小于M组(P<0.01),其中S8组抑制表皮增厚效果较为明显。与M组比较,复方加味脂桂酊干预各组皮肤组织中IL-17、IL-23水平均降低(P<0.01);其中S8组降低更明显(P<0.01)。结论复方加味脂桂酊以S8的配伍方案联合自然光照为最佳治疗方案,通过降低辅助性T细胞17相关细胞因子的表达,抑制咪喹莫特诱导的银屑病样炎症暴发的强度及银屑病样皮损的形成,发挥抗炎作用。

关键词：银屑病辅助性T细胞复方加味脂桂酊光化学疗法

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Intelligent control of mode-locked femtosecond pulses by time-stretch-assisted real-time spectral analysis

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Light(Science & Applications) 2020年第1期9卷 1881-1888页

作者： Guoqing Pu Lilin Yi Li Zhang Chao Luo Zhaohui Li weisheng hu State Key Lab of Advanced Communication Systems and Networks Shanghai Institute for Advanced Communication and Data ScienceShanghai Jiao Tong UniversityShanghai 200240China Sun Yat-sen University/Southern Marine Science and Engineering Guangdong Laboratory ZhuhaiChina

Mode-locked fiber lasers based on nonlinear polarization evolution can generate femtosecond pulses with different pulse widths and rich spectral distributions for versatile applications through polarization ***,a precise and repeatable location of a specific pulsation regime is extremely ***,by using fast spectral analysis based on a time-stretched dispersion Fourier transform as the spectral discrimination criterion,along with an intelligent polarization search algorithm,for the first time,we achieved real-time control of the spectral width and shape of mode-locked femtosecond pulses;the spectral width can be tuned from 10 to 40 nm with a resolution of ~1.47 nm,and the spectral shape can be programmed to be hyperbolic secant or ***,we reveal the complex,repeatable transition dynamics of the spectrum broadening of femtosecond pulses,including five middle phases,which provides deep insight into ultrashort pulse formation that cannot be observed with traditional mode-locked lasers.

关键词： polarization tuning spectral

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基于陈无择“运气十六方”探讨五运六气理论在皮肤病领域的辨治特色

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四川中医 2024年第1期42卷 49-53页

作者：胡炜圣江晓灵周莹洁黄宁福建中医药大学附属第二人民医院福建福州350001 福建中医药大学附属第二人民医院中西医结合皮肤病福建省高校重点实验室福建福州350001

运气学说肇基自《黄帝内经》,是用以寻求构建人类最佳生存空间的理论。皮肤疾患常迁延难愈、病程缠绵、瘥后易复,以运气理论诊疗皮肤疾患多有效验。通过论述运气建法与皮肤藩篱间之巨阳固护、节律运营的交互关系,提出先天五运六气禀赋... 详细信息

运气学说肇基自《黄帝内经》,是用以寻求构建人类最佳生存空间的理论。皮肤疾患常迁延难愈、病程缠绵、瘥后易复,以运气理论诊疗皮肤疾患多有效验。通过论述运气建法与皮肤藩篱间之巨阳固护、节律运营的交互关系,提出先天五运六气禀赋影响皮肤疾患的易患性,后天五运六气流布影响肤疾患的易发性。又梳理前人既效之方,提出运气理论调摄皮肤疾患之时以运气十六方砌其藩篱、重视“欲解时”调其枢机、敷布“太阳”以固其腠理的观点,对于扩大皮肤疾患临床辨证思路有所裨益,为医家用运气学说指导皮肤病临床提供了范例。

关键词：五运六气皮肤病运气十六方皮肤屏障研究进展

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