an optical fiber evanescent wave methane gas sensor based on core diameter mismatch is reported.
提出一种基于纤芯失配的光纤倏逝波甲烷传感器。
the formula by shadow「s length and shadow」s position of two vertical directions to calculate core diameter was found.
本文又推导了利用无透镜测径系统相互垂直两方向的影长和影位置信息来计算线芯直径的公式;
the pcf region and core diameter given are the average of three measurements along each axis, and the ellipticity is the ratio of the maximum to the minimum measurement.
有关地域的中心,给出了均匀直径三轴,沿着每个尺寸的椭圆率是最大的比例最小计量。
by means of intermediate image immersing technology, the present invention has increased reflection angle, reduced straight collimator core diameter and shortened straight collimator length.
本发明是借助中间像浸没的技术,增大反射角、减小直光管芯径,缩短直光管的长度。
the output characteristic of hundred-micron core diameter fiber laser and its mode control technique are researched.
研究了阶跃折射率分布的百微米芯径双包层光纤激光器的输出特性及其模式控制技术。
in experiment, output modes of hundred-micron core diameter fiber laser are controled by the hole in the laser cavity, and the effects to beam quality are researched with holes of different diameters.