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1、激光原理与激光技术习题答案习题一(1)为使氦氖激光器的相干长度达到1m,它的单色性Dl/l应为多大?解:(2)l=5000Å的光子单色性Dl/l=10-7,求此光子的位置不确定量Dx解:(3)CO2激光器的腔长L=100cm,反射镜直径D=1.5cm,两镜的光强反射系数分别为r1=0.985,r2=0.8。求由衍射损耗及输出损耗分别引起的d、tc、Q、Dnc(设n=1)解:衍射损耗:输出损耗:(4)有一个谐振腔,腔长L=1m,两个反射镜中,一个全反,一个半反,半反镜反射系数r=0.99,求在150
2、0MHz的范围内所包含的纵模个数,及每个纵模的线宽(不考虑其它损耗)解:(5)某固体激光器的腔长为45cm,介质长30cm,折射率n=1.5,设此腔总的单程损耗率0.01p,求此激光器的无源腔本征纵模的模式线宽。Japanguardandsui,respectivelystationedcountiessongling,shengze,pingWang,zhenzetownandtransporthub,buildingpositions,establishmentofmantell,implem
3、entingdotsoccupation.Theninothertownsandlargeruralareaswithouttheenemygarrison.Localover-abundanceguerrillasinWujiang,inwhichfamousChengWanjun,ZhaoAnminforceinTaihuLakearea,strictareaofZhuXi'sTomb,Wuzhen,WangHesongforcesnorth,luqu,LiliforcefullyHaoDao
4、sheng,ChenAyouYixingtroopseachfortheparty.Thefirsthalfof1938,thirdwarzoneCommanderoftheKuomintangandChairmanoftheJiangsuProvince,Guzhutong,appointedcommanderChengZerenShenLiqunandagainstself-defence解:(6)氦氖激光器相干长度1km,出射光斑的半径为r=0.3mm,求光源线宽及1km处的相干面积与相干体
5、积。解:习题二(1)自然加宽的线型函数为求①线宽②若用矩形线型函数代替(两函数高度相等)再求线宽。解:①线型函数的最大值为令②矩形线型函数的最大值若为则其线宽为(2)发光原子以0.2c的速度沿某光波传播方向运动,并与该光波发生共振,若此光波波长l=0.5mm,求此发光原子的静止中心频率。解:(3)某发光原子静止时发出0.488mm的光,当它以0.2c速度背离观察者运动,则观察者认为它发出的光波长变为多大?解:(4)激光器输出光波长l=10mm,功率为1w,求每秒从激光上能级向下能级跃迁的粒子数。解
6、:Japanguardandsui,respectivelystationedcountiessongling,shengze,pingWang,zhenzetownandtransporthub,buildingpositions,establishmentofmantell,implementingdotsoccupation.Theninothertownsandlargeruralareaswithouttheenemygarrison.Localover-abundanceguerril
7、lasinWujiang,inwhichfamousChengWanjun,ZhaoAnminforceinTaihuLakearea,strictareaofZhuXi'sTomb,Wuzhen,WangHesongforcesnorth,luqu,LiliforcefullyHaoDaosheng,ChenAyouYixingtroopseachfortheparty.Thefirsthalfof1938,thirdwarzoneCommanderoftheKuomintangandChair
8、manoftheJiangsuProvince,Guzhutong,appointedcommanderChengZerenShenLiqunandagainstself-defence(6)红宝石调Q激光器中有可能将几乎全部的Cr+3激发到激光上能级,并产生激光巨脉冲。设红宝石棒直径为1cm,长为7.5cm,Cr+3的浓度为2´109cm-3,脉冲宽度10ns,求输出激光的最大能量和脉冲功率。解:(7)静止氖原子3S2®2P4谱线中心波长0.6328mm,求当它以0.1c速度向观