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Microstructures made in optical fiber with femtosecond laser

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International Journal of Smart and Nano Materials 2010年第4期1卷 237-248页

作者： kaiming zhou Lin Zhang Xianfeng Chen Vladimir Mezentsev Ian Bennion Photonic Research Group Aston UniversityBirminghamB47ETUnited Kingdom

Different types of microstructures including microchannels and microslots were made in optical fibers using femtosecond laser inscription and chemical *** with UV-inscribed fiber Bragg gratings,these microstructures have miniature,robustness and high sensitivity features and have been used to implement novel devices for various sensing *** fiber microchannels were used to detect the refractive index change of liquid presenting sensitivities up to 7.4 nm/refractive index unit(RIU)and 166.7 dB/RIU based on wavelength and power detection,respectively.A microslot-in-fiber based liquid core waveguide as a refractometer has been proposed and the device was used to measure refractive index,and a sensitivity up to 945 nm/RIU(10−6/pm)was *** filling epoxy in the microslot and subsequent UV light curing,a hybrid waveguide grating structure with polymer core and glass cladding was *** obtained device was highly thermal responsive,demonstrating a linear coefficient of 211 pm/◦C.

关键词： ultrafast laser optical fiber fiber Bragg grating

UV-Inscribed Optical Fiber Gratings in Mid-IR Range and Their Laser Applications

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Journal of Electronic Science and Technology 2015年第4期13卷 328-342页

作者： Zhongyuan Sun Zhijun Yan kaiming zhou Qizhen Sun Abdulyezir Ayomipo Badmos Lin Zhang Aston Institute of Photonic Technologies Aston University

We have UV-inscribed fiber Bragg gratings （FBGs）, long-period gratings （LPGs） and tilted fiber gratings （TFGs） into mid-IR 2μm range using three common optical fiber grating fabrication techniques （two-beam holographic, phase mask and point-by-point）. The fabricated FBGs have been evaluated for thermal and strain response. It has been revealed that the FBG devices with responses in mid-IR range are much more sensitive to temperature than that in near-IR range. To explore the unique cladding mode coupling function, we have investigated the thermal and refractive index sensitivities of LPGs and identified that the coupled cladding modes in mid-IR range are also much more sensitive to temperature and surrounding medium refractive index change. The 45° tilted fiber gratings （45°-TFGs） as polarizing devices in mid-IR have been investigated for their polarization extinction characteristics. As efficient reflection filters and in-cavity polarizers, the mid-IR FBGs and 45°-TFGs have been employed in fiber laser cavity to realize multi-wavelength 2μm Tm-doped CW and mode locked fiber lasers, respectively.

关键词： Fiber Bragg grating long periodgrating Mid-IR fiber lasers tilted fiber grating.

Preliminary Conceptual Design of Helium Experimental Loop

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Southwestern Institute of Physics Annual Report

Southwestern Institute of Physics Annual Report 2006年第1期 140-142页

作者： YE Xingfu FENG kaiming ZHAO zhou MA Lihua HAO Tengfei

For the qualification of TBM design, it is indispensable to test mock-ups in a helium loop under realistic pressure and temperature profiles. The main characteristics of the loop and preliminary conceptual design are ... 详细信息

关键词： Helium loop Blanket module

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模拟电路的单粒子瞬时效应

核技术 2006年第3期29卷 194-197页

作者：陈盘训周开明中国工程物理研究院电子工程研究所绵阳621900

综合介绍一种新的单粒子作用现象。模拟电路在单个重离子撞击下,在输出端产生瞬时信号,这种瞬时扰动可能影响到连接模拟电路输出端的电路,例如运算放大器的输出可能连接到数字计数器的输入端,由重离子引起放大器足够大的瞬时输出脉冲可... 详细信息

综合介绍一种新的单粒子作用现象。模拟电路在单个重离子撞击下,在输出端产生瞬时信号,这种瞬时扰动可能影响到连接模拟电路输出端的电路,例如运算放大器的输出可能连接到数字计数器的输入端,由重离子引起放大器足够大的瞬时输出脉冲可能增加计数器的计数。另外,这种输出端的瞬时电压信号可能改变其它电路的状态。

关键词：模拟电路单粒子瞬时脉冲激光线性能量转移

Compact vector twist sensor using a small period long period fiber grating inscribed with femtosecond laser

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Chinese Optics Letters 2021年第9期19卷 1-6页

作者： Fangcheng Shen Xuewen Shu kaiming zhou Haiming jiang Hongyan Xia Kang Xie Lin Zhang State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment School of Electromechanical EngineeringGuangdong University of TechnologyGuangzhou 510006China Wuhan National Laboratory for Optoelectronics&School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Institute of Photonic and Technologies Aston UniversityBirmingham B47ETUK

We propose and demonstrate a sensitive vector twist sensor based on a small period long period fiber grating(SP-LPFG)fabricated with a femtosecond(fs)*** fabricated SP-LPFG is compact in size(2.8 mm)and shows strong polarization dependent peaks in its transmission spectrum due to the vectorial behavior of high-order cladding *** sensing is realized by monitoring the polarization dependent peaks,since the polarization of input light changes with fiber *** proposed sensor can be interrogated by the peak intensity and wavelength,with high twist sensitivity that reaches 0.257 dB/deg and 0.115 nm/deg,respectively.

关键词： fiber optical sensor long period fiber grating twist sensor

Power Tapping Function in Near Infra-Red Region Based on 45°Tilted Fiber Gratings

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Optics and Photonics Journal 2013年第2期3卷 158-162页

作者： Adedotun Adebayo Zhijun Yan kaiming zhou Lin Zhang Hongyan Fu David Robinson Arden Photonics Ltd. Solihull UK Aston Institute of Photonics Technology School of Engineering and Applied Science Aston University Birmingham UK Department of Electronic Engineering School of Information Science and Engineering Xiamen University Xiamen China

We report an efficient power tapping device working in near infra-red (800 nm) wavelength region based on UV-in- scribed 45° tilted fiber grating (45°-TFG) structure. Five 45°-TFGs were UV-inscribed in hydrogenated PS750 fiber using a custom-designed phase mask with different grating lengths of 3 mm, 5 mm, 9 mm, 12 mm and 15 mm, showing polarization dependent losses (PDLs) of 1 dB, 3 dB, 7 dB, 10 dB and 13 dB, respectively. The power side-tapping efficiency is clearly depending on the grating strength. It has been identified that the power tapping efficiency increases with the grating strength and deceases along the grating length. The side-tapped power profile has also been examined in azimuthal direction, showing a near-Gaussian distribution. These experimental results clearly demonstrated that 45°- TFGs may be used as in-fiber power tapping devices for applications requiring in-line signal monitoring.

关键词： Power Tapping Tilted Fiber Grating Polarization Dependent Loss In-Fiber Polarizer

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线缆系统电磁脉冲效应测量系统研制和试验

强激光与粒子束 2014年第7期26卷 169-173页

作者：周开明王艳邓建红中国工程物理研究院电子工程研究所四川绵阳621999 中国工程物理研究院复杂电磁环境实验室四川绵阳621999

分析了实验室瞬态X射线产生的系统电磁脉冲(SGEMP)效应测试所面临的技术问题,提出了解决方法、措施以及实验室模拟瞬态X射线的SGEMP模拟试验方法。通过电子屏蔽、电磁屏蔽、光电隔离、信号对称提取等特殊技术处理,解决了SGEMP效应模拟... 详细信息

分析了实验室瞬态X射线产生的系统电磁脉冲(SGEMP)效应测试所面临的技术问题,提出了解决方法、措施以及实验室模拟瞬态X射线的SGEMP模拟试验方法。通过电子屏蔽、电磁屏蔽、光电隔离、信号对称提取等特殊技术处理,解决了SGEMP效应模拟试验方法和测量系统抗X射线、抗电磁辐射等技术问题,并在大型瞬态X射线模拟源上,测出了瞬态X射线辐照时金属腔内线缆的SGEMP效应波形及幅值。

关键词：瞬态X射线系统电磁脉冲辐射效应光纤传输电流测量系统

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γ脉宽对电子器件瞬时辐照效应的影响

强激光与粒子束 2009年第10期21卷 1539-1541页

作者：朱小锋赵洪超周开明中国工程物理研究院电子工程研究所四川绵阳621900

采用了2种γ脉冲辐射源，在脉冲宽度分别约为20，50，150ns，剂量率为10^6～10^6Gy（Si）·s^-1下，对5种不同类型的电子器件进行了辐照试验并对其辐照响应进行了分析，比较了不同脉冲宽度条件下辐照响应的差异。实验结果表明：脉冲宽... 详细信息

采用了2种γ脉冲辐射源，在脉冲宽度分别约为20，50，150ns，剂量率为10^6～10^6Gy（Si）·s^-1下，对5种不同类型的电子器件进行了辐照试验并对其辐照响应进行了分析，比较了不同脉冲宽度条件下辐照响应的差异。实验结果表明：脉冲宽度是影响瞬时辐照效应的重要因素，γ脉冲宽度越宽，辐照响应越强，分离器件比集成电路受脉宽的影响更明显。

关键词：脉冲宽度辐射效应剂量率辐射存储时间

砷酸铁@四氧化三铁磁性固砷材料的设计及稳定化研究

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有色金属（冶炼部分） 2024年第1期 114-120页

作者：汪洋周开鸣山东师范大学化学化工与材料科学学院功能化学品智能制造教育部工程研究中心济南250014

目前工业中的固砷的方法主要是铁法固砷,即使用稳定的晶型砷酸铁除砷固砷。为了对砷酸铁固砷进行优化研究,使用惰性四氧化三铁对砷酸铁晶体进行包覆处理,增强其耐酸碱能力,实现稳定化固砷的目的。通过对不同反应pH、铁砷摩尔比、反应温... 详细信息

目前工业中的固砷的方法主要是铁法固砷,即使用稳定的晶型砷酸铁除砷固砷。为了对砷酸铁固砷进行优化研究,使用惰性四氧化三铁对砷酸铁晶体进行包覆处理,增强其耐酸碱能力,实现稳定化固砷的目的。通过对不同反应pH、铁砷摩尔比、反应温度所制备复合材料稳定性的研究,确定最优化固砷条件。最后通过毒性浸出试验(TCLP)评估了四氧化三铁包覆后的磁性固砷材料在极端环境下的长期稳定性。结果表明:使用四氧化三铁稳定化处理后的砷酸铁材料,能够达到国家危废处理相关标准,是合格的固砷材料。

关键词：砷处理固砷材料砷酸铁稳定化处理