10 research outputs found

    面发射量子级联激光器的研究

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    短波长光栅面发射量子级联激光器结构及制备方法

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    一种短波长光栅面发射量子级联激光器结构,包括:一衬底;一下波导层生长在该衬底上;一有源层生长在该下波导层上;一上波导层生长在该有源层上;一盖层生长在该上波导层上,该盖层的上半部位置形成二级分布反馈光栅;一光栅层位于盖层的上面,并且该光栅层具有与盖层上的光栅相同的光栅周期,在该光栅层上形成有多个窗口,所述窗口的深度到达盖层的表面;其中所述的下波导层、有源层、上波导层、盖层和光栅层的两侧为梯形斜面;一二氧化硅层生长在衬底的上面和梯形斜面上,及所述光栅层上面两侧的边缘部分;一正面金属电极层生长在二氧化硅层的上面及光栅层表面未被二氧化硅层覆盖的两侧的边缘部分;一背面金属电极层生长在衬底的下面,形成短波长光栅面发射量子级联激光器结构

    垂直发射量子级联激光器结构

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    本发明提供一种垂直发射量子级联激光器结构,包括:一衬底,在该衬底上依次生长有波导层、有源层和接触层;金属光栅层,该金属光栅层位于接触层的上面,并且该金属光栅层具有二级布拉格周期

    Using GOCI extracting information of red tide for time-series analysing in East China Sea(基于GOCI提取东海近几年赤潮信息及时序分析)

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    赤潮已经成为我国东海最普遍的海洋灾害之一.利用卫星手段监测赤潮也由来已久.采用Geostationary Ocean Color Imager(GOCI)静止卫星对东海近几年的赤潮进行了监测和分析.研究表明:1)利用Quick Atmospheric Correction(QUAC)获取GOCI的归一化离水辐射率,其中nLw(555 nm)作为赤潮事件的特征波段来监测赤潮是有效的;2)以nLw(555 nm)为峰值且通过小于1.5 mW • cm-2 • sr-1 • µm-1这一阀值信息来监测中国东海3次不同时间和区域的赤潮事件.3次事件分别为2011年5月东海原甲藻事件、2011年7月中肋骨条藻事件和2014年5月东海原甲藻事件;3)赤潮面积的日变化主要受有效光合辐射和潮位的影响.通过QUAC获取归一化离水辐射率GOCI-nLw(550 nm),将nLw(555 nm)作为特征波段来获取赤潮信息,并结合光照强度、潮位、温度等参数,分析了赤潮面积日变化的可能原因

    带有准光子晶体波导的量子级联激光器及其制作方法

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    一种带有准光子晶体波导的量子级联激光器,包括:一衬底;一下波导层生长在衬底之上,且中间有一凸台,凸台的两侧形成脊型双沟台面结构;一量子级联有源区结构生长在下波导层的凸台之上;一上波导层生长在量子级联有源区结构之上;一上包层生长在上波导层之上;一上覆盖层生长在上包层之上;一高掺杂欧姆接触层生长在上覆盖层之上;一准光子晶体结构阵列制作在上覆盖层和高掺杂欧姆接触层的两侧,中间的宽度为2μm-10μm,两侧的准光子晶体结构阵列的宽度相同,分别为5-24μm;一电绝缘层沉积在欧姆接触层之上,覆盖整个脊型台面上表面和侧壁,在覆盖有绝缘层的脊型台面中心部位留出电注入窗口;一正面电极制作在绝缘层之上;一背面电极生长在衬底的背面

    智能传感器主动协同的变电站机器人智能巡检系统及方法

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    本发明提供了一种智能传感器主动协同的变电站机器人智能巡检系统及方法,本发明巡检系统包括:智能机器人协同巡检层、自主协同层和变电站智能传感层形成三层智能巡检架构。本发明巡检系统中,巡检机器人进行自主路径规划完成图像数据采集,智能传感器感知被检测设备的状态并进行数据预处理和分析,巡检机器人和智能传感器通过近场通信机制和智能执行器进行主动协同,协同服务器基于巡检机器人感知数据进行复杂场景识别,以及对巡检机器人感知数据和智能传感器感知数据进行多源数据融合分析。显著的提升了巡视的及时性,避免操作过程的人员安全风险.减少巡检时的人工干预,保证变电巡视任务顺利进行

    JUNO Sensitivity on Proton Decay pνˉK+p\to \bar\nu K^+ Searches

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    The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in pνˉK+p\to \bar\nu K^+ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via pνˉK+p\to \bar\nu K^+ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is 9.6×10339.6 \times 10^{33} years, competitive with the current best limits on the proton lifetime in this channel

    JUNO sensitivity on proton decay pνK+p → νK^{+} searches

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    JUNO sensitivity on proton decay p → ν K + searches*

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    The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the pνˉK+ p\to \bar{\nu} K^+ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via pνˉK+ p\to \bar{\nu} K^+ is 36.9% ± 4.9% with a background level of 0.2±0.05(syst)±0.2\pm 0.05({\rm syst})\pm 0.2(stat) 0.2({\rm stat}) events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is 9.6×1033 9.6 \times 10^{33} years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies
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