The application of laser is developed widely with its four characteristics : high intensity , directionality , monochromaticity and coherence 由于激光的高方向性，高单色性，高相干性等优点，使激光的应用得到了广泛的发展。
2.
The differences of the monochromaticity and the direction of ultraviolet laser and non - laser ultraviolet source are analyzed firstly . the advantage of ultraviolet laser in exposing su - 8 photoresist is discussed 首先分析了激光紫外光源与普通紫外光源在单色性与方向性上的差异,论证了采用激光紫外光源曝光su - 8光刻胶的优势。
3.
The laser unit , because of its monochromaticity and small divergency , is used as sensor ’ s light source . devices and chips provided with high - speed responsing and processing capabilities are employed . as a result , the achieved uncertainty of time measuring is 125 ps , demonstrating an accuracy improvement in magnitude of an order 在设计制作中采用了单色性和方向性好的激光作为光源,选取了高速响应和有高速处理能力的一系列器件、芯片,因此时间测量的精度达到了125ps ,比以往的测试方法提高了1个数量级以上,速度测量精度达到扫描速度的0 . 1 % 。
4.
As a method to obtain higher sbs reflectivity by improving the monochromaticity of laser system , the ld end - pumped pulse - microchip laser operated on high - repetition and single - frequency has also been researched . in section v , we revised the previous theoretical model for passive - q - switched laser using cr4 + : nd3 + : yag by introducing the space dependence between the photons and inversion populations in microchip resonator 由于泵浦激光的线宽对sbs反射率有显著影响，而利用单纵模、高重复频率运转的脉冲微片激光器作为dpl系统种子光源来提高激光系统单色性是一种可行的技术方案。
5.
In this paper , a new theoretical model is established for optical fiber pumped by broadband laser . using the new model , we have analyzed the influence of longitudinal - mode number , bandwidth and line - width of pumping source on sbs reflectivity , and pointed out the monochromaticity of pumping laser has obvious affect on optical fiber conjugator 成功解释了激光线宽、纵模间隔与数目对光纤中sbs过程的影响，并通过数值计算分析了sbs阈值、反射率、相对稳定性、保真度等性能参数随着注入激光能量、脉宽以及光纤长度、芯径的变化趋势。
