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电光与控制2017年第24第1期 目录
【出 处】
：
电光与控制
【发表日期】
：
2017年24期
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将云看作由众多冰水同心球粒子所构成，建立冰水同心球模型。模拟冰水混合云，计算可见光(0.66 μm)和近红外波段(1.64 μm和2.14 μm)的反射函数和光学厚度，建立查找表。选取MODIS卫星数据中1通道、6通道和7通道数据，用最小方差拟合法反演光学厚度、有效粒子半径，和MOD06数据中的光厚度和有效粒子半径对比结果较一致，实验结果表明提出的冰水混合云的反演方法具有合理性。
当前窄线宽光纤激光器的输出功率已经达到数千瓦,但是受激布里渊散射(SBS)仍然是制约其功率提升和系统稳定性的主要因素。基于倾斜光纤Bragg光栅(TFBG)对SBS产生的后向斯托克斯(Stokes)光的滤波作用,实验验证了TFBG对SBS的抑制作用。将经优化设计并制备的倾斜光纤光栅置于单模光纤放大器和一段长150 m的单模传能光纤之间,发现后向传输的Stokes光的滤除率接近10 dB,同时观测到了明显的SBS阈值提升,阈值约为不加TFBG时的1.25倍,前向输出的信号功率提升了约20%。该研究对于高功率
Theoretical analysis of the performance of a single side band multicarrier source based on a re-circ
An optical bandpass filter (OBF) is an important element whose properties considerably influence the output performance of a single side band multicarrier source based on a re-circulating frequency shifter. The influence of the OBF in the loop on the outp
几年以前激光棒比雪茄烟还要小，而现在已经长达3呎或更大。此类棒由美帝西屋研究实验室提供。它是用掺微量钕的玻璃制成的。在实验中用此棒的目的，是为了增加用于焊接、打孔和精密机械加工的激光系统的尺寸、输出功率及效率。
期刊
A simple experiment for laser diffraction of capillary waves on liquid film surface (LFS) is realized. Steady and visible diffraction patterns are obtained. The dispersion relation of capillary waves on LFS is verified by laser diffraction. In particular,
期刊
We fabricate slightly deformed fused-silica microspheres in which whispering gallery modes possess remarkably directional escape emission from the microsphere boundary. With efficient free-space excitation and collection, the lateral spatial distribution
An adaptive modulation system for a liquid crystal (LC) phase modulator is demonstrated. The phase retardation may be modulated by resetting the driving voltage automatically by matching the measured and ideal transmittance of an LC cell sandwiched by cro
A novel polarization maintaining fiber (PMF) loop is proposed and used for an interferometric fiber optic gyroscope (FOG). By splicing a conventional PMF loop with two pigtailed polarization beam splitters, polarized light can be guided to propagate along