loss n. 1.丧失;丢失,遗失。 2.减损,损失,亏损(额);损耗;减少,下降。 3.失败;输掉。 4.错过;浪费。 5.损毁;【军事】伤亡;〔pl.〕 伤亡及被俘人数。 loss of sight 失明。 copper loss【电学】铜耗。 core [iron] loss【电学】铁耗。 a dead loss净亏,纯损。 an idling loss空转损耗。 a total loss总损失。 His death is a great loss to the country. 他的死是国家的大损失。 profit and loss盈亏。 suffer heavy losses 遭受重大损失。 loss of pressure 压力下降。 loss in weight 重量[体重]减少。 loss of weight 失重。 the loss of a war 战败。 loss of opportunity 错过机会。 at a loss 1. 无办法,为难 (I am at a loss what to do. 我就是不知道怎样办才好)。 2. (猎犬)失去猎物嗅迹。 3. 亏本地 (sell sth. at a loss赔本卖出某物)。 cut a [the] loss 赶紧脱手以免多受损失。 for a loss 处于苦恼中 (throw them for a loss 使他们苦恼)。 make a loss 亏损。 without (any) loss of time 即刻,马上。
The former has compact structure ; , little cavity loss , higher coupling efficiency , and higher superposition efficiency . but there is no enough room for other devices . the latter overcome this problem , but the diffraction loss and mirror loss is increased 六镜环形谐振腔可以确保角度很小,但总腔长较长,腔内衍射及腔镜吸收和不完全反射造成的损耗较大,同样很难得到稳定的双波长激光输出。
Used as ring - down cavity , this stable resonator has , firstly , more influence of misalignment of cavity mirrors on its measured reflectivity , but less of length misadjustment ; secondly , shorter cavity length which advantageous in engineering ; finally , less diffraction loss and thus higher metrical precision 结果表明,这种稳定腔用作衰荡腔,测量结果受腔镜角度失调影响较大,而受腔长失调影响小;其长度较短,便于工程应用;衍射损耗较小,测量精度高。
According to the theory of acousto - optic ( ao ) interaction , the formulas of diffraction loss of two ao q - switches , which acousto - field are perpendicular or parallel one another , the power divider for ensuring two ao q - switch synchronization and effective power driving is designed . the calculation results are satisfied with nd : yag laser experimental results . it is show that two ao q - switches , which acousto - field are perpendicular each other , switch - loss is nearly one times larger than one ao q - switch , one of third larger than the two ao q - switches which acousto - field are parallel 从理论上对声光器件衍射损耗作了分析与计算,研究了二维双声光器件对提高衍射损耗效率的影响,在实验中采用二维双声光组合器件提高声光器件的对nd : yag激光器的关断能力,较之单声光的关断能力提高了一倍左右,而对于平行双声光也提高了30左右,并设计了声光驱动功率分配器以驱动双声光器件达到同步,消除了激光输出的多脉冲现象,提高了脉冲列的输出功率。
Three parts ( 6 chapters ) are included in this dissertation except the 1 st and 6th chapters . the first part ( the 2nd , 3rd and 4th chapters ) is the theory for analyzing and designing resonators with diffraction optical elements by use of a matrix eigenvalue method . the eigen modes and diffraction loss for a laser cavity have been obtained by this method 本论文主要包括三个部分共八章,除第一章绪论和第八章总结外,主要内容如下:第一部分(第二、三、四章)主要讨论和分析了决定激光光束的输出特性和光束参量的激光谐振腔,阐述和建立了矩阵本征值方法分析和设计激光谐振腔的系统理论。