同名作者【Yaocheng Shi】论文列表 -- 中国光学期刊网

同名作者【Yaocheng Shi】论文列表

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Silicon Photonics

Ultracompact silicon on-chip polarization controller

Weike Zhao ^1†Yingying Peng ^1†Mingyu Zhu ¹Ruoran Liu ¹[ ... ]Daoxin Dai ^1,4,*

Author Affiliations

Abstract

¹ State Key Laboratory for Modern Optical Instrumentation, Center for Optical & Electromagnetic Research, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Zhejiang University, Zijingang Campus, Hangzhou 310058, China

² School of Precision Instrument and Optoelectronic Engineering, Tianjin University, Tianjin 300072, China

³ Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education, Tianjin 300072, China

⁴ Ningbo Research Institute, Zhejiang University, Ningbo 315100, China

On-chip polarization controllers are extremely important for various optical systems. In this paper, a compact and robust silicon-based on-chip polarization controller is proposed and demonstrated by integrating a special polarization converter and phase shifters. The special polarization converter consists of a

1 \times 1

Mach–Zehnder interferometer with two polarization-dependent mode converters at the input/output ends. When light with an arbitrary state of polarization (SOP) is launched into the chip, the

{TE}_{0}

and

{TM}_{0}

modes are simultaneously excited. The polarization extinction ratio (PER) and the phase difference for the

{TE}_{0} / {TM}_{0}

modes are tuned by controlling the first phase shifter, the polarization converter, and the second phase shifter. As a result, one can reconstruct the light SOP at the output port. The fabricated polarization controller, as compact as

\sim 150 {μm}^{} \times 700 {μm}^{}

, exhibits an excess loss of less than 1 dB and a record PER range of

> 54 dB

for arbitrary input light beams in the wavelength range of 1530–1620 nm.

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Photonics Research

2024, 12(2): 183

Research Articles

On-chip digitally tunable positive/negative dispersion controller using bidirectional chirped multimode waveguide gratings

Shujun Liu ¹Ruitao Ma ¹Zejie Yu ^1,2,3Yaocheng Shi ^1,2,3,4Daoxin Dai ^1,2,3,4,*

Author Affiliations

Abstract

¹ Zhejiang University, College of Optical Science and Engineering, International Research Center for Advanced Photonics, State Key Laboratory for Extreme Photonics and Instrumentation, Hangzhou, China

² Jiaxing Key Laboratory of Photonic Sensing and Intelligent Imaging, Jiaxing, China

³ Zhejiang University, Jiaxing Research Institute, Intelligent Optics and Photonics Research Center, Jiaxing, China

⁴ Zhejiang University, Ningbo Research Institute, Ningbo, China

A silicon-based digitally tunable positive/negative dispersion controller (DC) is proposed and realized for the first time using the cascaded bidirectional chirped multimode waveguide gratings (CMWGs), achieving positive and negative dispersion by switching the light propagation direction. A 1 × 2 Mach–Zehnder switch (MZS) and a 2 × 1 MZS are placed before and after to route the light path for realizing positive/negative switching. The device has Q stages of identical bidirectional CMWGs with a binary sequence. Thus the digital tuning is convenient and scalable, and the total dispersion accumulated by all the stages can be tuned digitally from - ( 2^Q - 1 ) D₀ to ( 2^Q - 1 ) D₀ with a step of D₀ by controlling the switching states of all 2 × 2 MZSs, where D₀ is the dispersion provided by a single bidirectional CMWG unit. Finally, a digitally tunable positive/negative DC with Q = 4 is designed and fabricated. These CMWGs are designed with a 4-mm-long grating section, enabling the dispersion D₀ of about 4.16 ps / nm in a 20-nm-wide bandwidth. The dispersion is tuned from -61.53 to 63.77 ps / nm by switching all MZSs appropriately, and the corresponding group delay is varied from -1021 to 1037 ps.

silicon photonics dispersion tuning digital tuning multimode waveguide grating

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Advanced Photonics

2023, 5(6): 066005

Research Articles

Reconfigurable optical add-drop multiplexers for hybrid mode-/wavelength-division-multiplexing systems

Xiaolin Yi ¹Weike Zhao ¹Chenlei Li ¹Long Zhang ¹[ ... ]Daoxin Dai ^1,2,3,*

Author Affiliations

Abstract

¹ Zhejiang University, College of Optical Science and Engineering, Center for Optical and Electromagnetic Research, International Research Center for Advanced Photonics, State Key Laboratory for Modern Optical Instrumentation, Hangzhou, China

² Zhejiang University, Ningbo Research Institute, Ningbo, China

³ Zhejiang University, Jiaxing Research Institute, Intelligent Optics and Photonics Research Center, Jiaxing Key Laboratory of Photonic Sensing and Intelligent Imaging, Jiaxing, China

Dealing with the increase in data workloads and network complexity requires efficient selective manipulation of any channels in hybrid mode-/wavelength-division multiplexing (MDM/WDM) systems. A reconfigurable optical add-drop multiplexer (ROADM) using special modal field redistribution is proposed and demonstrated to enable the selective access of any mode-/wavelength-channels. With the assistance of the subwavelength grating structures, the launched modes are redistributed to be the supermodes localized at different regions of the multimode bus waveguide. Microring resonators are placed at the corresponding side of the bus waveguide to have specific evanescent coupling of the redistributed supermodes, so that any mode-/wavelength-channel can be added/dropped by thermally tuning the resonant wavelength. As an example, a ROADM for the case with three mode-channels is designed with low excess losses of <0.6, 0.7, and 1.3 dB as well as low cross talks of < - 26.3, -28.5, and -39.3 dB for the TE₀, TE₁, and TE₂ modes, respectively, around the central wavelength of 1550 nm. The data transmission of 30 Gbps / channel is also demonstrated successfully. The present ROADM provides a promising route for data switching/routing in hybrid MDM/WDM systems.

reconfigurability hybrid multiplexing subwavelength grating silicon photonics

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Advanced Photonics Nexus

2023, 2(6): 066004

Integrated Optics

High-speed 2D beam steering based on a thin-film lithium niobate optical phased array with a large field of view

Wenlei Li ¹Xu Zhao ²Jianghao He ¹Hao Yan ¹[ ... ]Yaocheng Shi ^1,*

Author Affiliations

Abstract

¹ State Key Laboratory for Modern Optical Instrumentation, Center for Optical and Electromagnetic Research, International Research Center for Advanced Photonics, Ningbo Research Institute, College of Optical Science and Engineering, Zhejiang University, China

² School of Physics, Xidian University, Xi’an 710071, China

³ e-mail: jingyechen@zju.edu.cn

An on-chip optical phased array (OPA) is considered as a promising solution for next generation solid-state beam steering. However, most of the reported OPAs suffer from low operating bandwidths, making them limited in many applications. We propose and demonstrate a high-speed 2D scanning OPA based on thin-film lithium niobate phase modulators with traveling-wave electrodes. The measured modulation bandwidth is up to 2.5 GHz. Moreover, an aperiodic array combined with a slab grating antenna is also used to suppress the grating lobes of far-field beams, which enables a large field of view (FOV) as well as small beam width. A 16-channel OPA demonstrates an FOV of

50 ° \times 8.6 °

and a beam width of

0.73 ° \times 2.8 °

in the phase tuning direction and the wavelength scanning direction, respectively.

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Photonics Research

2023, 11(11): 1912

Silicon Photonics

Reconfigurable multichannel amplitude equalizer based on cascaded silicon photonic microrings

Changping Zhang ¹Shujun Liu ¹Hao Yan ¹Dajian Liu ^1,2[ ... ]Daoxin Dai ^1,3,*

Author Affiliations

Abstract

² ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou 311200, China

³ Ningbo Research Institute, Zhejiang University, Ningbo 315100, China

A compact on-chip reconfigurable multichannel amplitude equalizer based on cascaded elliptical microrings is proposed and demonstrated experimentally. With the optimized structure of the elliptical microring with adiabatically varied radii/widths, the average excess loss for each channel in the initialized state is measured to be less than 0.5 dB, while the attenuation dynamic range can be over 20 dB. Flexible tunability through the overlapping of the resonance peaks of adjacent wavelength-channels enables even higher attenuation dynamic ranges up to 50 dB. Leveraging the thermo-optic effect and fine wavelength-tuning linearity, precise tuning of the resonance peak can be implemented, enabling dynamic power equalization of each wavelength-channel in wavelength-division-multiplexing (WDM) systems and optical frequency combs. The proposed architecture exhibits excellent scalability, which can facilitate the development of long-haul optical transport networks and high-capacity neuromorphic computing systems, while improving the overall performance of optical signals in WDM-related systems.

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Photonics Research

2023, 11(5): 742

集成光学

高性能无源硅光波导器件：发展与挑战特邀综述

下载：1642次

刘大建赵伟科张龙宋立甲 [ ... ]戴道锌 ^*

作者单位

摘要

浙江大学光电科学与工程学院，浙江杭州 310058

硅光技术凭借其CMOS兼容性和高集成度等突出优势，被认为是最具发展潜力的新一代光子集成主流技术，在全球范围内受到极大关注。近年来，无源/有源硅光器件及其集成芯片研究均取得了重要进展。而随着光通信、光互连、光传感、光测量及光计算等新兴领域的飞速发展，硅光技术迎来了更为广阔的应用空间。与此同时，硅光器件及芯片也面临着更高性能、更高密度和更大规模等重要挑战。本文聚焦于面向波分复用、偏振复用、模式复用及混合复用等应用的高性能无源硅光波导器件，重点阐述了其性能突破及功能拓展，并探讨了硅光波导器件的发展前景。

集成光学硅光波分复用偏振复用模式复用高性能

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光学学报

2022, 42(17): 1713001

Next-generation Silicon Photonics

Silicon photonics for high-capacity data communications

Download：1558次

Yaocheng Shi ^1,*Yong Zhang ²Yating Wan ^3,4Yu Yu ⁵[ ... ]Bingcheng Pan ¹

Author Affiliations

Abstract

¹ Centre for Optical and Electromagnetic Research, State Key Laboratory for Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Zijingang Campus, Hangzhou 310058, China

² State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

³ Institute for Energy Efficiency, University of California Santa Barbara, Santa Barbara, California 93106, USA

⁴ Electrical and Computer Engineering Department, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia

⁵ Wuhan National Laboratory for Optoelectronics & School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China

⁶ National Information Optoelectronics Innovation Center, China Information and Communication Technologies Group Corporation (CICT), Wuhan 430074, China

⁷ State Key Laboratory of Optical Communication Technologies and Networks, China Information and Communication Technologies Group Corporation (CICT), Wuhan 430074, China

⁸ Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China

In recent years, optical modulators, photodetectors, (de)multiplexers, and heterogeneously integrated lasers based on silicon optical platforms have been verified. The performance of some devices even surpasses the traditional III-V and photonic integrated circuit (PIC) platforms, laying the foundation for large-scale photonic integration. Silicon photonic technology can overcome the limitations of traditional transceiver technology in high-speed transmission networks to support faster interconnection between data centers. In this article, we will review recent progress for silicon PICs. The first part gives an overview of recent achievements in silicon PICs. The second part introduces the silicon photonic building blocks, including low-loss waveguides, passive devices, modulators, photodetectors, heterogeneously integrated lasers, and so on. In the third part, the recent progress on high-capacity silicon photonic transceivers is discussed. In the fourth part, we give a review of high-capacity silicon photonic networks on chip.

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Photonics Research

2022, 10(9): A106

Silicon Photonics

Toward calibration-free Mach–Zehnder switches for next-generation silicon photonics

Lijia Song ^1,2Tangnan Chen ¹Weixi Liu ¹Hongxuan Liu ¹[ ... ]Daoxin Dai ^1,2,*

Author Affiliations

Abstract

¹ State Key Laboratory for Modern Optical Instrumentation, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Zhejiang University, Zijingang Campus, Hangzhou 310058, China

² International Research Center for Advanced Photonics, Zhejiang University, Haining 314499, China

Silicon photonic Mach–Zehnder switches (MZSs) have been extensively investigated as a promising candidate for optical systems. However, conventional

2 \times 2

MZSs are usually prone to the size variations of the arm waveguides due to imperfect fabrication, resulting in considerable random phase imbalance between the two arms, thereby imposing significant challenges for further developing next-generation

N \times N

MZSs. Here we propose a novel design toward calibration-free

2 \times 2

and

N \times N

MZSs, employing optimally widened arm waveguides, enabled by novel compact tapered Euler S-bends with incorporated mode filters. With standard 180 nm CMOS foundry processes, more than thirty

2 \times 2

MZSs and one

4 \times 4

Benes MZS with the new design are fabricated and characterized. Compared with their conventional counterparts with 0.45-μm-wide arm waveguides, the present

2 \times 2

MZSs exhibit significant reduction in the random phase imbalance. The measured extinction ratios of the present

2 \times 2

and

4 \times 4

MZSs operating in the all-cross state are 27-49 dB and

\sim 20 dB

across the wavelength range of

\sim 60 nm

, respectively, even without any calibrations. This work paves the way toward calibration-free large-scale

N \times N

MZSs for next-generation silicon photonics.

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Photonics Research

2022, 10(3): 03000793

Research Articles

Subwavelength silicon photonics for on-chip mode-manipulation

Chenlei Li ¹Ming Zhang ^1,2Hongnan Xu ¹Ying Tan ^1,2[ ... ]Daoxin Dai ^1,2,*

Author Affiliations

Abstract

¹ Centre for Optical and Electromagnetic Research, State Key Laboratory for Modern Optical Instrumentation, Zhejiang Provincial Key Laboratory for Sensing Technologies, International Research Center for Advanced Photonics, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310058, China

² Ningbo Research Institute, Zhejiang University, Ningbo 315100, China

On-chip mode-manipulation is one of the most important physical fundamentals for many photonic integrated devices and circuits. In the past years, great progresses have been achieved on subwavelength silicon photonics for on-chip mode-manipulation by introducing special subwavelength photonic waveguides. Among them, there are two popular waveguide structures available. One is silicon hybrid plasmonic waveguides (HPWGs) and the other one is silicon subwavelength-structured waveguides (SSWGs). In this paper, we focus on subwavelength silicon photonic devices and the applications with the manipulation of the effective indices, the modal field profiles, the mode dispersion, as well as the birefringence. First, a review is given about subwavelength silicon photonics for the fundamental-mode manipulation, including high-performance polarization-handling devices, efficient mode converters for chip-fiber edge-coupling, and ultra-broadband power splitters. Second, a review is given about subwavelength silicon photonics for the higher-order-mode manipulation, including multimode converters, multimode waveguide bends, and multimode waveguide crossing. Finally, some emerging applications of subwavelength silicon photonics for on-chip mode-manipulation are discussed.

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PhotoniX

2021, 2(1): 11

光学器件

硅基光学相控阵芯片相位噪声补偿研究

下载：833次

王晓斌 ¹曹阳 ²刘春波 ²赵旭 ²[ ... ]时尧成 ³

作者单位

摘要

¹ 西安电子科技大学通信工程学院, 陕西西安 710071

² 西安电子科技大学物理与光电工程学院, 陕西西安 710071

³ 浙江大学现代光学仪器国家重点实验室, 浙江杭州 310058

⁴ 浙江大学宁波研究院, 浙江宁波 315100

针对硅基光学相控阵芯片输出的光束质量受波导刻蚀和键合过程中相位噪声的影响,基于随机并行梯度下降算法以高速单点光电探测器为性能评价函数采集器研制相位控制器,构建一维64阵元硅基光学相控阵芯片光束优化的原理实验系统,实现硅基光学相控阵芯片的快速相位噪声补偿。接着研究相位控制器性能与硅基光学相控阵芯片响应特性匹配关系对光束优化效果的影响,初始光场强度对随机并行梯度下降算法收敛时间的影响,以及环境温度对相位噪声补偿效果的影响。实验结果表明,系统完成单个角度的光束优化时间为0.26 s,优化后的光束各项指标与器件设计吻合。

光学器件集成光学光学相控阵随机并行梯度下降算法光束扫描

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光学学报

2021, 41(23): 2323001

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