double trailing arm type

The frequency- stabilized double longitudinal modes He-Ne laser with thermoregulation is used as light source,which has high stability of frequency difference(less than 1×10 -7 in the open air) and good anti-disturbance performance that has been proved by theory and experiments.

装置以双纵模热稳频He Ne激光器为光源。

By using TEM photography to test the distribution of particle size, findings are that the distribution of particle size of the CoFe\-2O\-4 ultra fine particle prepared from the method of coprecipitation appears to be double mode distribution, whereas the distribution of particle size in the magnetic fluid appears to be LOG normal.

采用TEM照片分析 ,发现共沉淀法制备的CoFe2 O4超细微粒粒径分布为双纵数分布 ,而酸蚀法配制的磁性液体中超细微粒的粒径分布为对数正态分

4 μm FIR line was obtained by single-longitudinal-mode or two-longitudinal-mode pumping,and experimental comparison of output and operating gas pressure between single and two-longitudinal-mode OPFIRL were studied.

实验上采用可选纵模的 TEA- CO2 激光器作泵浦源 ,用 CO2 - 9R(16 )线泵浦小型腔式 NH3远红外激光器 ,在单、双纵模泵浦条件下均获得波长为 90 。