检索结果-南通市图书馆

Versatile photonic molecule switch in multimode microresonators

Light(Science & Applications) 2024年第3期13卷 498-509页

作者： Zihan Tao bitao shen Wencan Li Luwen Xing Haoyu Wang Yichen Wu Yuansheng Tao Yan Zhou Yandong He Chao Peng Haowen Shu Xingjun Wang State Key Laboratory of Advanced Optical Communications System and Networks School of ElectronicsPeking UniversityBeijing 100871China College of Engineering Peking UniversityBeijing 100871China School of Integrated Circuits Peking University100871 BejingChina Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China Frontiers Science Center for Nano-optoelectronics Peking UniversityBeijing 100871China Peng Cheng Laboratory Shenzhen 518055China

Harnessing optical supermode interaction to construct artificial photonic molecules has uncovered a series of fundamental optical phenomena analogous to atomic ***,the distinct energy levels and interactions in such two-level systems were provided by coupled *** reconfigurability is limited,as they often require delicate external field stimuli or mechanically altering the geometric *** highly specific approaches also limit potential ***,we propose a versatile on-chip photonic molecule in a multimode microring,utilizing a flexible regulation methodology to dynamically control the existence and interaction strength of spatial *** transition between single/multi-mode states enables the“switched-off/on”functionality of the photonic molecule,supporting wider generalized applications *** particular,“switched-on”state shows flexible and multidimensional mode splitting control in aspects of both coupling strength and phase difference,equivalent to the *** *** effect.“Switched-off”state allows for perfect low-loss single-mode transition(Qi~10 million)under an ultra-compact bend size(FSR~115 GHz)in a foundry-based silicon *** breaks the stereotyped image of the FSR-Q factor trade-off,enabling ultra-wideband and high-resolution millimeter-wave photonic *** demonstration provides a flexible and portable solution for the integrated photonic molecule system,extending its research scope from fundamental physics to real-world applications such as nonlinear optical signal processing and sixth-generation wireless communication.

关键词： switched multimode millimeter

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Reliable intracavity reflection for self-injection locking lasers and microcomb generation

引用

Photonics Research 2024年第5期12卷 I0001-I0010页

作者： bitao shen XUGUANG ZHANG YIMENG WANG ZIHAN TAO HAOWEN SHU HUAJIN CHANG WENCAN LI YAN ZHOU Zhangfeng Ge RUIXUAN CHEN BOWEN BAI LIN CHANG XINGJUN WANG State Key Laboratory of Advanced Optical Communications System and Networks School of ElectronicsPeking UniversityBeijing 100871China Peng Cheng Laboratory Shenzhen 518055China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China Frontiers Science Center for Nano-optoelectronics Peking UniversityBeijing 100871China

Self-injection locking has emerged as a crucial technique for coherent optical sources,spanning from narrow linewidth lasers to the generation of localized *** technique involves key components,namely a laser diode and a high-quality cavity that induces narrow-band reflection back into the laser ***,in prior studies,the reflection mainly relied on the random intracavity Rayleigh backscattering,rendering it unpredictable and unsuitable for large-scale production and wide-band *** this work,we present a simple approach to achieve reliable intracavity reflection for self-injection locking to address this challenge by introducing a Sagnac loop into the *** method guarantees robust reflection for every resonance within a wide operational band without compromising the quality factor or adding complexity to the fabrication *** a proof of concept,we showcase the robust generation of narrow linewidth lasers and localized microcombs locked to different resonances within a normal-dispersion ***,the existence and generation of localized patterns in a normal-dispersion cavity with broadband forward–backward field coupling is first proved,as far as we know,both in simulation and in *** research offers a transformative approach to self-injection locking and holds great potential for large-scale production.

关键词： intracavity injection locking

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Highly reconfigurable silicon integrated microwave photonic filter towards next-generation wireless communication

引用

Photonics Research 2023年第5期11卷 682-694页

作者： ZIHAN TAO YUANshenG TAO MING JIN JUN QIN RUIXUAN CHEN bitao shen YICHEN WU HAOWEN SHU SHAOHUA YU XINGJUN WANG State Key Laboratory of Advanced Optical Communications System and Networks School of ElectronicsPeking UniversityBeijing 100871China Key Laboratory of Information and Communication Systems Ministry of Information IndustryBeijing Information Science and Technology UniversityBeijing 100192China Peng Cheng Laboratory Shenzhen 518055China Frontiers Science Center for Nano-optoelectronics Peking UniversityBeijing 100871China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China

Integrated microwave photonic filters(IMPFs)are capable of offering unparalleled performances in terms of superb spectral fineness,broadband,and more importantly,the reconfigurability,which encounter the trend of the next-generation wireless ***,to achieve high reconfigurability,previous works should adopt complicated system structures and modulation formats,which put great pressure on power consumption and controlment,and,therefore,impede the massive deployment of ***,we propose a streamlined architecture for a wideband and highly reconfigurable IMPF on the silicon photonics *** various practical filter responses,to avoid complex auxiliary devices and bias drift problems,a phase-modulated flexible sideband cancellation method is employed based on the intensity-consistent single-stage-adjustable cascadedmicroring(ICSSA-CM).The IMPF exhibits an operation band extending to millimeter-wave(≥30 GHz),and other extraordinary performances including high spectral resolution of 220 MHz and large rejection ratio of 60 d B are ***,Gb/s-level RF wireless communications are demonstrated for the first time towards real-world *** proposed IMPF provides broadband flexible spectrum control capabilities,showing great potential in the next-generation wireless communication.

关键词： reconfigurable filter millimeter

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A design method for high fabrication tolerance integrated optical mode multiplexer

引用

Science China(Information Sciences) 2020年第6期63卷 184-194页

作者： bitao shen Haowen SHU Linjie ZHOU Xingjun WANG State Key Laboratory on Advanced Optical Communication Systems and Networks Department of ElectronicsSchool of Electronics Engineering and Computer Science Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Nano-optoelectronics Frontier Center of Ministry of Education Peking University

The tapered asymmetric directional coupler has the potential to realize high fabrication tolerance and high transmission efficiency on-chip mode multiplexer. However, the geometry parameter selection of tapered structure remains empirical. In this paper, we propose a design method for the tapered structure based on genetic algorithm. Combined with the adjusted coupling equations and interpolation method, lowtime-cost optimization can be realized. Three mode multiplexers(TE0&TE1, TE0&TE2 and TE0&TE5)are designed by our method. According to simulation results, the insertion loss of the designed devices is lower than 1.8 dB and the crosstalk is lower than-15 dB when the fabrication error is within required range(±10 nm for TE0&TE2 and TE0&TE5, and ±20 nm for TE0&TE1) in the bandwidth of 1.5–1.6 μm. In addition, the entire optimization process takes only 2 h for each device, which is around the time cost of a single 3 D simulation.

关键词： mode multiplexer directional coupler taper structure coupled-mode theory genetic algorithm

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Submilliwatt, widely tunable coherent microcomb generation with feedback-free operation

引用

Advanced Photonics 2023年第3期5卷 144-154页

作者： Haowen Shu Lin Chang Chenghao Lao bitao shen Weiqiang Xie Xuguang Zhang Ming Jin Yuansheng Tao Ruixuan Chen Zihan Tao Huajin Chang Shaohua Yu Qifan Yang Xingjun Wang John E.Bowers Peking University School of ElectronicsState Key Laboratory of Advanced Optical Communication Systems and NetworksBeijingChina University of California Santa BarbaraDepartment of Electrical and Computer EngineeringSanta BarbaraCaliforniaUnited States Peking University School of PhysicsState Key Laboratory for Artificial Microstructure and Mesoscopic PhysicsBeijingChina Peng Cheng Laboratory ShenzhenChina Peking University Frontiers Science Center for Nano-OptoelectronicsBeijingChina

Microcombs are revolutionizing optoelectronics by providing parallel, mutually coherent wavelengthchannels for time-frequency metrology and information processing. To implement this essential function inintegrated photonic systems, it is desirable to drive microcombs directly with an on-chip laser in a simpleand flexible way. However, two major difficulties have prevented this goal: (1) generating mode-lockedcomb states usually requires a significant amount of pump power and (2) the requirement to align laser andresonator frequency significantly complicates operation and limits the tunability of the comb lines. Here, weaddress these problems by using microresonators on an AlGaAs on-insulator platform to generate dark-pulsemicrocombs. This highly nonlinear platform dramatically relaxes fabrication requirements and leads to arecord-low pump power of <1 mW for coherent comb generation. Dark-pulse microcombs facilitated bythermally controlled avoided mode crossings are accessed by direct distributed feedback laser *** any feedback or control circuitries, the comb shows good coherence and stability. With around150 mW on-chip power, this approach also leads to an unprecedentedly wide tuning range of over one freespectral range (97.5 GHz). Our work provides a route to realize power-efficient, simple, and reconfigurablemicrocombs that can be seamlessly integrated with a wide range of photonic systems.

关键词： dark-pulse microcomb direct pumping scheme widely tunable source

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

建筑室外架空燃气管道新型支架体系

引用

煤气与热力 2024年第7期44卷 V0010-V0013页

作者：申晋益潘强张雷宾余俊伟罗紫丹江碧涛成都燃气集团股份有限公司四川成都610041

阐述管道支架组成、种类、制造工艺。提出建筑室外架空燃气管道支架体系组成(包括支架底座、支架配件、方形补偿器),阐述新型支架特点。

关键词：架空燃气管道新型支架支架体系不锈钢精密铸造

来源：

维普期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

海上风电场功率提升和疲劳平衡综合优化控制

引用

太阳能学报 2021年第1期42卷 180-186页

作者：邓智文郭苏许昌王碧涛 shen Wenzhong 河海大学能源与电气学院南京211100 南京河大风电科技有限公司南京211300 丹麦科技大学风能系 Lyngby DK-2800

针对海上风电场,综合功率提升和疲劳平衡分配的优化目标,提出一种以天为优化周期的优化策略。在电网高负荷时段,基于Jensen尾流模型,以轴向诱导因子为优化变量,风电场整场功率最大为目标,运用随机粒子群算法进行风功率利用提升优化控制... 详细信息

针对海上风电场,综合功率提升和疲劳平衡分配的优化目标,提出一种以天为优化周期的优化策略。在电网高负荷时段,基于Jensen尾流模型,以轴向诱导因子为优化变量,风电场整场功率最大为目标,运用随机粒子群算法进行风功率利用提升优化控制;在电网低负荷时段,基于风电机组综合疲劳系数计算方法,以机组轴向诱导因子为优化变量,应用尾流计算模型调整轴向诱导因子来满足电网限功率指令,以机组疲劳系数标准差最小为目标,采用粒子群算法寻优进行疲劳平衡优化。以某海上风电场进行算例分析,结果表明该优化策略在一天的优化周期内可较好地实现风电场功率提升和疲劳平衡的综合优化。

关键词：海上风电场疲劳粒子群优化算法有功功率提升疲劳平衡优化

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

S曲线加减速控制新算法的研究

引用

机床与液压 2009年第10期37卷 27-29页

作者：张碧陶高伟强沈列阎秋生广东工业大学广东广州510006 广州市诺信数字测控设备有限公司广东广州510385

针对传统的多段S曲线加减速控制算法参数多、计算复杂的问题,提出一种S曲线的加减速控制新算法。实验证明:这种简单的控制算法能快速而又准确地预测运动轨迹,而且能保证速度的过渡平滑,加工精度高,确保数控系统对实时性的要求。

关键词： S曲线加减速数控系统柔性控制

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

微处理器Rabbit2000与液晶显示控制器T6963c的接口及编程

引用

电力自动化设备 2008年第10期28卷 107-109页

作者：沈卫星许仁安於涛刘爱民郑有余肖碧涛国电南京自动化股份有限公司江苏南京210003

液晶显示器与高性能的RabbitCore RCM2200型模块配合使用,可以组成继电保护装置的人机界面接口(MMI)模件,该模件主要负责显示和修改保护CPU的信息。重点介绍了RabbitCoreRCM2200型模块与内置T6963c控制器的VPG12864T液晶模块的实用接口... 详细信息

液晶显示器与高性能的RabbitCore RCM2200型模块配合使用,可以组成继电保护装置的人机界面接口(MMI)模件,该模件主要负责显示和修改保护CPU的信息。重点介绍了RabbitCoreRCM2200型模块与内置T6963c控制器的VPG12864T液晶模块的实用接口硬件设计,给出了直接控制方式及接口电路;利用RCM2200模块的特点,即E口实现数据的读、写操作。RCM2200模块的程序设计采用Z-World公司的编译软件DynamicC编程,给出了VPG12864T液晶显示模块写参数命令的流程图。显示的汉字是以标准16×16字库为基准,选取MMI模块界面所要应用的汉字,生成一个新的精简汉字库,给出了生成汉字库格式及屏幕显示汉字的流程图。所设计的接口可行、高效。

关键词：液晶显示器控制器接口字库

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

特低渗油藏大剂量微球深部调驱提高采收率技术实践

引用

石油化工应用 2022年第9期41卷 69-71,86页

作者：沈焕文王治国王碧涛陈建宏郭文娟李娟中国石油长庆油田分公司第三采油厂宁夏银川750006

特低渗油藏进入中高含水阶段后,受储层非均质性及注水长期冲刷形成高渗带影响,注水单向突进愈加突出,油藏含水上升速度加快,采油速度直线下降,控水稳产难度加大。微球调驱技术具有初始粒径小、吸水膨胀、弹性形变能力,易运移到地层深部... 详细信息

特低渗油藏进入中高含水阶段后,受储层非均质性及注水长期冲刷形成高渗带影响,注水单向突进愈加突出,油藏含水上升速度加快,采油速度直线下降,控水稳产难度加大。微球调驱技术具有初始粒径小、吸水膨胀、弹性形变能力,易运移到地层深部,实现逐级深部调驱特点,进而扩大注水波及体积。本文根据油藏开发矛盾结合微球调驱特点,开展PV级微球大剂量深部调驱试验,历经三年多现场试验,试验区年含水上升率由4.5%下降到-2.1%,相比水驱递减采油速度提高0.38%,阶段累计增油1.85×10^(4)t,预测增加可采储量15.71×10^(4)t,采收率提高3.5%。

关键词：大剂量微球深部调驱提高采收率

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：