论文部分内容阅读
光电技术应用2020年第35卷第4期 目录
【出 处】
：
光电技术应用
【发表日期】
：
2020年35期
其他文献
研究了具有不同中心载波波长的高功率双脉冲在微纳孔硅波导中的非线性光学过程和输出脉冲在时域与频域的波形特征。结果表明,由于双光子吸收、自由载流子吸收、自由载流子色散、自相位调制和交叉相位调制的非线性效应作用,在波导输出端,目标脉冲的不对称时域和频域脉冲波形被观察,而且脉冲波形的改变依赖于注入功率、初始宽度、波导长度和脉冲时延参数。
三步空域准相移技术是一种单帧相位解调技术，适用于动态条纹相位分析。本文在已有的三步空域准相移技术的基础上，提出了一种改进的三步空域准相移技术。改进后，在计算每个像素点相位时，可以根据具体情况，灵活选择邻域范围，调节所使用像素点的个数，有利于噪声的隔离，避免误差的传播，从而提高动态条纹分析中相位解调的精度。
For the high peak-to-average power ratio (PAPR) of coherent optical orthogonal frequency division multiplexing (CO-OFDM) system, a novel joint technique which is the combination of iterative partial transmit sequence (IPTS) and clipping technique is propo
期刊
Pure Ge is grown on Si substrate to control the release of the strain in the heterostructure, which is due to the 4.2% lattice misfit between Ge and Si. In this letter, an innovative approach of multi-buffer layers is proposed for the epitaxial growth of
Full-color and less-speckled modified Gerchberg–Saxton algorithm computer-generated hologram floatin
This Letter proposes to apply full-color computer-generated holograms to the virtual image projection system so that the viewers can comfortably view floating images. Regarding the spatial division and distribution operation, a modified Gerchberg–Saxton a
采用激光熔化沉积技术制备了TiC/CaF2/Inconel 718高温合金基高温耐磨自润滑复合材料,对其显微组织、显微硬度及高温干滑动摩擦磨损性能进行了研究,探讨了其高温磨损机理。结果表明:复合材料的显微组织由TiC、CaF2、Cr7C3、γ″-Ni3Nb和γ-(Ni, Fe)构成,原位自生TiC初生相和细小CaF2/TiC共晶弥散分布在被Cr7C3和γ″-Ni3Nb等超细高温相强化的γ-(Ni, Fe)固溶体基体上;复合材料的平均显微硬度为820 HV;与激光熔化沉积Inconel 718对比样相比,复
Cellular metabolism arouses the changes of substance in extracellular physiological microenvironment, and the metabolic level reflects the physiological state of cells. This paper developed a novel microphysiometer automatic analysis instrument based on m
High-Q, low-mode-volume microsphere-integrated Fabry–Perot cavity for optofluidic lasing application
We develop a hybrid optofluidic microcavity by placing a microsphere with a diameter ranging from 1 to 4 μm in liquid-filled plano-plano Fabry–Perot (FP) cavities, which can provide an extremely low effective mode volume down to
期刊
根据ErP5O14的吸收和荧光光谱,用Judd—Ofelt理论计算了在此晶体中Er3 的强度参数Ωλ（或τλ）,由此计算了激光能级辐射跃迁速率、辐射寿命、荧光分支比和积分发射截面等光谱参数。提出了在Peap与强度参数的总和之间存在直线关系的经验公式。讨论了ErP5O14作为激光材料的可能性。
期刊
本文列举了当冷却温度从-15 ℃至 40 ℃混合气体压力从40至170亳米汞柱条件下连续工作的波导CO激光器的能量特性和光谱特性的研究结果。表明，振荡谱线数随着压力和温度的增高而减少。在确定的条件下，观察未建立选择装置的谐振腔时波数1846.9厘米-1,功率约0.2瓦的单谱线振荡。在这条谱线上实现了300兆 赫的频率范围内辐射频率的连续调谐。激光器在封离条件下工作800小时以上。
期刊