检索结果-内蒙古大学图书馆

European Conference on Microwave

作者： Noman Siddique Yinggang Li Haisu Li Qigejian Wang Muhammad Talal Ali Khan Jonas Hansryd Shaghik Atakaramians Shaghik&#x0027 s THz Group School of Electrical Engineering and Telecommunications UNSW Sydney NSW Australia Ericsson Research Ericsson AB Gothenburg Sweden Key Laboratory of All Optical Network and Advanced Telecommunication Network of EMC Institute of Lightwave Technology Beijing Jiaotong University China

ISBN: (纸本)9781665447218

A rectangular polymer fiber based on COC material is proposed for short-distance polarization-maintaining communication links. Numerical study is implemented to find out the optimum dimension of the dielectric core. The proposed millimeter-wave rectangular waveguide posses low modal loss of 0.13 – 2.54 dB/m, reasonably low dispersion and high birefringence for the D-band frequency range (130–170 GHz). Measured loss from our preliminary characterization agrees well with the calculated values up to 290 GHz. Considering the recent advances in fiber drawing techniques, these fibers can be fabricated in large quantities and thus has the potential to pave the path for polarization-sensitive, low-loss and low-dispersion THz interconnects and short-range, high-speed data links.

关键词： optical fiber polarization Millimeter wave technology Millimeter wave measurements Rectangular waveguides Microwave communication Dielectric loss measurement optical fiber communication

来源：评论

学校读者我要写书评

暂无评论

8.1 Gbps PAM8 Long-Wave IR FSO Transmission using a 9.15-μm Directly-Modulated QCL with an MCT Detector

8.1 Gbps PAM8 Long-Wave IR FSO Transmission using a 9.15-μm...

引用

2023 optical Fiber Communications Conference and Exhibition, OFC 2023

作者： Joharifar, Mahdieh Han, Mengyao Schatz, Richard Puerta, Rafael Sun, Yan-Ting Fan, Yuchuan Maisons, Gregory Abautret, Johan Teissier, Roland Zhang, Lu Spolitis, Sandis Wang, Muguang Bobrovs, Vjaceslavs Lourdudoss, Sebastian Yu, Xianbin Popov, Sergei Ozolins, Oskars Pang, Xiaodan Department of Applied Physics KTH Royal Institute of Technology Stockholm106 91 Sweden Institute of Lightwave Technology Key Lab of All Optical Network & Advanced Telecommunication Network Ministry of Education Beijing Jiaotong University Beijing100044 China Ericsson Research Ericsson AB Stockholm164 83 Sweden RISE Research Institutes of Sweden Kista16440 Sweden MirSense 2 Bd Thomas Gobert Palaiseau91120 France College of Information Science and Electronic Engineering Zhejiang University Zhejiang Lab Hangzhou310027 China Institute of Telecommunications Riga Technical University Riga1048 Latvia Communication Technologies Research Center Riga Technical University Riga1048 Latvia

We experimentally demonstrate a Long-Wave IR FSO link with a 9.15-μm directly modulated quantum cascade laser at room temperature. Up to 8.1 Gb/s PAM8 transmission over 1.4 meter is achieved with a wideband MCT detec... 详细信息

ISBN: (纸本)9781957171180

关键词： Quantum cascade lasers

来源：评论

学校读者我要写书评

暂无评论

Structure on crosstalk and bending loss in homogeneous few-mode multi-core fibers

引用

Optics Express 2020年第16期28卷 23806-23819页

作者： Xie, Yuheng Pei, Li Zheng, Jingjing Zhao, Qi Ning, Tigang Li, Jing Key Lab of All Optical Network and Advanced Telecommunication Network of EMC Institute of Lightwave Technology Beijing Jiaotong University Beijing100044 China

We present a novel dense hole-assisted structure (DHAS) in homogeneous few-mode multi-core fibers (FM-MCFs) for significantly suppressing inter-core crosstalk (XT) and bending loss while realizing a high spatial density in limited cladding diameter. The fabrication methods of DHAS FM-MCFs are illustrated and the equivalent model of DHAS is proposed. To point out the superiority, the XT of a DHAS 7-core 4-LP-mode fiber is investigated by an average power-coupling coefficients analytical expression in DHAS model and the equivalent model, respectively. A simple derived analytical expression for XT estimation in the trench-assisted homogeneous MCFs is introduced to verify the change of XT with fiber parameters in the equivalent model. The results imply that the XT obtained by the equivalent model is in good agreement with the one through DHAS model. Furthermore, the bending loss and chromatic dispersion dependences on DHAS are calculated by the finite element method (FEM). Through numerical simulations, we show that the DHAS has great contribution to meet the XT value requirement of lower than-30 dB/100km and make the bending loss values satisfy the ITU-T recommendations of G. 654 in a 7-core 4-LP-mode fiber with a 125-_m cladding diameter. The designed structure targets applications in space division multiplexing (SDM) fibers with independent transmission channels. © 2020 optical Society of America.

关键词： Crosstalk

来源：评论

学校读者我要写书评

暂无评论

Temperature-Insensitive Strain Sensor Based on Few-Mode Fiber

SSRN

引用

SSRN 2022年

作者： Gao, Xuekai Xu, Jian Zhang, Wei Lei, Feipeng Zheng, Jingjing Pei, Li Wang, Jianshuai Chai, Jinchuan Ning, Tigang Key Lab of All Optical Network & Advanced Telecommunication Network EMC Institute of Lightwave Technology Beijing Jiaotong University Beijing100044 China Beijing Institute of Spacecraft Environment Engineering Beijing100094 China Hunan Provincial Audit Office of the People’s Republic of China Hunan 410024 China National Railway Track Test Center China Academy of Railway Sciences Corporation Limited Beijing100015 China

An all-fiber strain sensor based on the few-mode fiber (FMF) hybrid construction is proposed and experimentally demonstrated to solve the problem of cross-sensitivity between strain and temperature. The proposed sensor is constructed by three pieces of FMFs that are the dislocation fusion structure. The strain sensitivity of the sensor is analyzed by the wavelength shift and light intensity. According to the wavelength shift analysis, experimental results show that the strain sensitivity of the proposed sensor is −3.13 pm/μΕ and −2.85 pm/μΕ at the wavelength of resonance peaks dipA and dipB in the strain range from 0 to 700 μΕ. Meanwhile, the wavelengths of resonance peaks dipA and dipB show few wavelengths shift in the temperature range of 20-60 ℃, which provides the possibility for the proposed sensor in strain sensing applications without cross-sensitivity under a temperature range of 20-60 ℃. According to the light intensity analysis, we find that there is a linear relationship between the amplitude of the spatial frequency spectrum and strain variation, and the amplitude decreases with the increase of strain at 0.026 nm-1 and 0.045 nm-1. The strain sensitivity is −0.0003 a.u./μΕ at 0.026 nm-1 and −0.0004 a.u./μΕ at 0.045 nm-1, and there is no spatial frequency shift as the strain increases. From the aspects of practicality and performance, the proposed strain sensor is not only easy to construct but also temperature insensitive. These advantages make the proposed strain sensor very promising in practical sensing applications under different temperatures. © 2022, The Authors. all rights reserved.

关键词： Fibers

来源：评论

学校读者我要写书评

暂无评论

Terahertz birefringent gratings for filtering and dispersion compensation

arXiv

引用

arXiv 2021年

作者： Khan, Muhammad Talal Ali Li, Haisu Liu, Yajing Peng, Gang-Ding Atakaramians, Shaghik Shaghik's THz Group School of Electrical Engineering and Telecommunications UNSW SydneyNSW2052 Australia Key Laboratory of All Optical Network and Advanced Telecommunication Network of EMC Institute of Lightwave Technology Beijing Jiaotong University Beijing100044 China

The recent development of the terahertz waveguide makes it an excellent platform for integrating many intriguing functionalities, which offers tremendous potential to build compact and robust terahertz systems. In the context of next-generation high-speed communication links at the terahertz band, engineering the dispersion and birefringence of terahertz waves is essential. Here, we experimentally demonstrate subwavelength birefringent waveguide gratings based on the low-loss cyclic olefin copolymer exploiting micro-machining fabrication techniques. Asymmetric cross-section and periodic-structural modulation along propagation direction are introduced to achieve birefringent THz grating for filtering and dispersion compensation. Because of strong index modulation in the subwavelength fiber, a high negative group velocity dispersion of -188 (-88) ps/mm/THz is achieved at 0.15 THz for x-polarization (y-polarization), i.e., 7.5 times increase compared to the state-of-the-art reported to date. Such high negative dispersion is realized in a 43 mm grating length, which is less than half of the length reported until now (e.g., 100 mm). Further, the subwavelength fiber grating filters two orthogonal polarization states and exhibits transmission dips with 8.5-dB and 7.5-dB extinction ratios for x and y polarization, respectively. Our experiment demonstrates the feasibility of using polymer-based terahertz gratings as a dispersion compensator in terahertz communications and steering polarized terahertz radiations for polarization-sensitive THz systems. © 2021, CC BY.

关键词： Modulation

来源：评论

学校读者我要写书评

暂无评论

Enhancing sensing capacity of terahertz metamaterial absorbers with a surface-relief design

引用

Photonics Research 2020年第4期8卷 519-527页

作者： WEI WANG FENGPING YAN SIYU TAN HAISU LI XUEMEI DU LUNA ZHANG ZHUOYA BAI DAN CHENG HONG ZHOU YAFEI HOU Key Laboratory of All Optical Network&Advanced Telecommunication of EMC Institute of Lightwave TechnologyBeijing Jiaotong UniversityBeijing 100044China Zhengzhou Xinda Institute of Advanced Technology Zhengzhou 450001China Department of Electronics Information and Communication EngineeringOsaka Institute of Technology5-16-1 OmiyaAsahi-kuOsaka535-8585Japan Graduate School of Natural Science and Technology Okayama University1-1-1 TsushimanakaKita WardOkayama Prefecture700-8530Japan

Metamaterial absorbers(MAs)serve as important electromagnetic wave-absorbing devices that have captured the attention of researchers for a long *** as sensitive detectors to determine perturbations in an ambient environment is another significant subsidiary ***,we theoretically propose an optimized fabrication method to implement terahertz MAs with fewer steps and also evaluate both absorption and sensing performances of such MAs realized by the new *** findings demonstrate that such MAs can basically maintain the original absorption features perfectly,including near-complete absorption at resonance as well as strong robustness to wide incident ***,the full width at half-maximum and quality factor of the absorption resonances attenuate less than 26%and 8%with this new method,remaining in the ranges of^0.03–0.04 THz and^20–27 for two selected example *** significantly,sensing capacities of this type of MA,in terms of maximum detection range(enhancing at least 9%),observable spectral modulation(increasing at least 6.3%),and refractive index sensitivity,are improved to a large extent because of more intense coupling between resonant field and matter in the case of surface-relief *** stronger coupling results from exposing more spots of the resonantly high field to direct contact with an approaching analyte,which is illustrated by field profiles of the MAs at resonance in this ***,other desirable absorber features are also explored with such MAs,like functioning as building blocks to configure multiband MAs and strong robustness against fabrication *** new-style terahertz MAs shown in the paper,acting as good examples,not only prove that terahertz MAs can be fabricated by the proposed time-and cost-saving route in contrast to the traditional MA fabrication process,but also can serve as novel platforms to explore other intriguing terahertz photonic effects,such as the field enhancement e

关键词： Enhancing sensing capacity terahertz metamaterial absorbers a surface-relief design

来源：评论

学校读者我要写书评

暂无评论

Single Core-offset Alignment for SFS Combs with High Extinction Ratio

Single Core-offset Alignment for SFS Combs with High Extinct...

引用

International Conference on optical Communications and networks (ICOCN)

作者： Jingjing Zheng Shaoshuo Ma Zuliang Ruan Ji Wang Jing Li Tigang Ning Li Pei Key Lab of All Optical Network & Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing China

Alignment has a significant influence on the characteristics of single mode- few mode- single mode (SFS) fiber interferometer. In this paper, the fiber interferometer based on dual LP0n-mode few-mode fibers under single core-offset alignment is presented, which can provide a good comb spectrum. Compared with the axially aligned SFS, this alignment can obtain good extinction ratio using conventional fibers; compared with the both side core-offset SFS, this alignment can provide optimization fabrication and has good fabrication repeatability.

关键词： optical fiber devices optical fiber networks optical fiber theory Extinction ratio optical interferometry

来源：评论

学校读者我要写书评

暂无评论

Terahertz Integrated Photonic Chip based on Metal/Dielectric Hybrid Waveguide

Terahertz Integrated Photonic Chip based on Metal/Dielectric...

引用

2020 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2020

作者： Li, Haisu Low, Mei Xian Ako, Rajour Tanyi Bhaskaran, Madhu Sriram, Sharath Withayachumnankul, Withawat Kuhlmey, Boris T. Atakaramians, Shaghik Institute of Lightwave Technology Beijing Jiaotong University Key Laboratory of All Optical Network and Advanced Telecommunication Network of Emc Beijing100044 China Rmit University Functional Materials and Microsystems Research Group Micro Nano Research Facility MelbourneVIC3000 Australia University of Adelaide Terahertz Engineering Laboratory School of Electrical and Electronic Engineering SA5005 Australia CamperdownNSW2006 Australia School of Electrical Engineering and Telecommunications Unsw SydneyNSW2052 Australia

We present an experimental demonstration of hybrid terahertz waveguide chips for terahertz integration, which support a single-mode, low-loss and low-dispersion bandwidth over 0.367-0.411 THz. Waveguide bends can also... 详细信息

ISBN: (纸本)9780646825045

关键词： Numerical simulation Photonic crystals Planar waveguides Silicon Terahertz spectroscopy Waveguides

来源：评论

学校读者我要写书评

暂无评论

Tunable Orbital Angular Momentum Generation from the Evolution of a Vector Mode

Tunable Orbital Angular Momentum Generation from the Evoluti...

引用

Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Youchao Jiang Key Lab of All Optical Network & Advanced Telecommunication Network of EMC Institute of Lightwave Technology Beijing Jiaotong University Beijing China

Tunable orbital angular momentum can be generated by combining two linearly polarized modes with orthogonal polarization directions. This mode status can be obtained from the evolution of a vector mode propagating in ... 详细信息

ISBN: (纸本)9781943580705

关键词： Few mode fibers optical angular momentum optical fibers optical vortices Phase shift Polarization maintaining fibers

来源：评论

学校读者我要写书评

暂无评论

Mode-locking in modeless laser cavity

arXiv

引用

arXiv 2020年

作者： Cheng, Dan Feng, Yujun Ding, Meng Nilsson, Johan Optoelectronics Research Centre University of Southampton SouthamptonSO17 1BJ United Kingdom Institute of Lightwave Technology Key Lab of All Optical Network and Advanced Telecommunication of EMC Beijing Jiaotong University Beijing100044 China

We demonstrate experimentally that random phase modulation of an erbium-doped fiber ring-laser with an intra-cavity electro-optic phase modulator did not inhibit ultra-short pulse operation (so-called mode-locking). Stable mode-locking was achieved even when the phase modulator was driven with random sequences sufficiently fast and strong to render the cavity modeless, as determined by heterodyne measurements. No significant change in the pulse characteristics was observed. The insensitivity to the random phase modulation is expected, given the lack of phase-sensitive elements in the cavity. Copyright © 2020, The Authors. all rights reserved.

关键词： Phase modulation

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：