为确保光学麦克风在电气设备内部应用的安全可靠性,文中选定聚氨酯、聚四氟乙烯、环氧树脂、聚醚醚酮和酚醛树脂作为封装材料,进行光学麦克风与电气设备相关的环境相容性试验,并采用扫描电子显微镜(scanning electron microscope,SEM)...为确保光学麦克风在电气设备内部应用的安全可靠性,文中选定聚氨酯、聚四氟乙烯、环氧树脂、聚醚醚酮和酚醛树脂作为封装材料,进行光学麦克风与电气设备相关的环境相容性试验,并采用扫描电子显微镜(scanning electron microscope,SEM)和傅里叶变换红外(Fourier transform infrared,FTIR)光谱仪对试验前后的材料性能进行检测。结果表明:聚氨酯表面易浸润变压器油且有明显颜色变化,不适用于油浸式变压器,但可用于水听器、空气和常温环境中;聚四氟乙烯与变压器油的相容性较好,可用于油浸式变压器、气体绝缘开关设备(gas insulated switchgear,GIS)和温度变化较大的场景;其余材料与电气设备的相容性不佳,适用性有待进一步研究。文中提出的封装材料与环境相容性试验的检测方法可为光学麦克风封装材料选型提供有益借鉴,具有一定的工程实用价值。展开更多
A high power collimated diode laser stack is carried out based on fast-axis collimation and stack packaging techniques. The module includes ten typical continuous wave （cw） bars and the total output power can be up ...A high power collimated diode laser stack is carried out based on fast-axis collimation and stack packaging techniques. The module includes ten typical continuous wave （cw） bars and the total output power can be up to 368W at 48.6A. Using a cylindrical lens as the collimation elements,we can make the fast-axis divergence and the slow-axis divergence are 0. 926 4° and 8. 206° respectively. The light emitting area is limited in a square area of 18.3 mm × 11 mm. The module has the advantage of high power density and offers a wide potential applications in pumping and material processing.展开更多
A novel scheme of all-optical AND gate based on a Fabry-Perot semiconductor optical amplifier(FP-SOA) is proposed and its feasibility is verified by simulation. Using this scheme, all-optical AND gate can be realized ...A novel scheme of all-optical AND gate based on a Fabry-Perot semiconductor optical amplifier(FP-SOA) is proposed and its feasibility is verified by simulation. Using this scheme, all-optical AND gate can be realized with the extinction ratio of 10 dB. The influence of pulse interval and pulse width on the extinction ratio is also investigated.展开更多
John Lau博士在美国伊利诺易州大学获得机械学理科和工科博士学位。在英国哥伦比亚大学获得结构力学硕士学位，并且分别于美国威斯康星大学和费尔兰迪更斯大学获得工程物理学和管理科学硕士学位。John Lau博士现担任美国安杰伦科技公司...John Lau博士在美国伊利诺易州大学获得机械学理科和工科博士学位。在英国哥伦比亚大学获得结构力学硕士学位，并且分别于美国威斯康星大学和费尔兰迪更斯大学获得工程物理学和管理科学硕士学位。John Lau博士现担任美国安杰伦科技公司的无铅项目经理。展开更多
文摘A high power collimated diode laser stack is carried out based on fast-axis collimation and stack packaging techniques. The module includes ten typical continuous wave （cw） bars and the total output power can be up to 368W at 48.6A. Using a cylindrical lens as the collimation elements,we can make the fast-axis divergence and the slow-axis divergence are 0. 926 4° and 8. 206° respectively. The light emitting area is limited in a square area of 18.3 mm × 11 mm. The module has the advantage of high power density and offers a wide potential applications in pumping and material processing.
基金National Nature Science Foundation of China(60572008)
文摘A novel scheme of all-optical AND gate based on a Fabry-Perot semiconductor optical amplifier(FP-SOA) is proposed and its feasibility is verified by simulation. Using this scheme, all-optical AND gate can be realized with the extinction ratio of 10 dB. The influence of pulse interval and pulse width on the extinction ratio is also investigated.
