The reason for the differences in the spectral purity with regard to longitudinal mode content of the lasers is still not clear . 关于这种激光器中，造成纵模成分的纯度有差别的原因，现在仍不清楚。
Along with ruby there are a great many other solid state lasers whose outputs range in wavelength from roughly 500 to 2500 nm . 除了红宝石之外，还有许多其它的固体激光器，输出波长从大约500纳米（nm）到2500纳米（nm）。
The broad fluorescence spectrum of the organic dyes suggests a broad tunability range for lasers using them as the active material . 有机染料具有宽荧光光谱使人们想到，若用它们作为激光介质，则激光器就会有宽的调谱范围。
As we've seen, the laser is distinctive in that it emits all its energy in the form of a single, narrow, diffraction-limited beam . 我们已经看到，激光器的一个突出之点，就是把全部能量都集中在一个很窄的，由受衍射限制的光束内射出。
By reducing the feedback of the cavity, a laser will no longer be self oscillatory but it will amplify an incident wave which has triggered stimulated emission . 减小腔的反馈，激光器就不再会自己振荡，而只是放大触发受激发射的入射波。
It is well established that facet damage is caused by the optical flux density at the laser facet and that it is not a function of the operating current . 业已明确肯定，端面损伤是由激光器端面的光流密度引起的，并且不是工作电流的函数。
It is well known that to start oscillation, every electronic oscillator, including of course the laser, must have a gain slightly in excess of the loses . 如所周知，每一个电子振荡器，当然包括激光器在内，都必须有稍大于损耗的增益才能开始振荡。
It is interesting to observe that the principle of operation for the "prism" coupler of fig. 3. 22b is being considered for extracting the output from lasers of the mesa type . 我们将看到图322b的“棱镜耦合器”工作原理正被考虑用来从台面激光器获得出，这是很有意义的。
Measuring mathod of major parameter for he - ne lasers 氦氖激光器主要参数测试方法
Optical damage investigation of raman shifting laser 喇曼频移激光器的光损伤研究
