物理实验报告数学系张冬梅ＰＢ０３００１１０４实验数据处理：1.测量半导体激光器的偏振度I最大值：(1470+1541)/2=1505.5µAI最小值：(92+92)/2=92µAminmaxminmaxIIIIp+−==[1505.5-92]/[1505.5+92]=0.88482、验证马吕斯定律P2偏振方向的绝对角度值φ、相对角度值θ和光强值I，以后每隔10°记录一次，直到P1与P2偏振方向的夹角为-90°，I0为P1与P2偏振方向的夹角为0°时的光强值，作出I/I0∼cos2θ的关系曲线（0°∼90°，0°∼-90°各一条，用最小二乘法求出斜率和截距，根据马吕斯定律斜率应为1，截距应为0，分析实验的误差）。I0=548μA验证马吕斯定律数据表格1φ136.7146.7156.7166.7176.7186.7196.7206.7216.7θ102030405060708090Cos2θ0.9700.8330.750.5870.4130.250.1170.0300IµA52547540331121713961150I/I00.9580.8670.7350.5680.4000.2540.1110.0270验证马吕斯定律数据表格2φ226.7236.7246.7256.7266.7276.7286.7296.7306.7θ80706050403020100Cos2θ0.0300.1170.2500.4130.5870.750.8330.9701IµA1558123202287368434479495I/I00.0270.1060.2240.3690.5240.6720.7920.8740.903用Origin软件处理上述数据并作图得：（作图见本实验报告文件夹附带的Origin文档）其中，x为Cos2θ，y为I/I0Ｂ为斜率以及斜率的标准差SB由表一数据得：0.00.20.40.60.81.00.00.20.40.60.81.0YAxisTitleXAxisTitleBLinearFitofData3_BLinearRegressionforData1_B:Y=A+B*XParameterValueError------------------------------------------------------------A-0.004280.00918B1.002160.01649------------------------------------------------------------RSDNP------------------------------------------------------------0.999050.016959<0.0001------------------------------------------------------------故斜率的A类不确定度为：(SB/9)^(1/2)=0.0428故斜率为:1.00216+−0.0428即I/I0与Cos2θ成线性关系,基本符合马吕思定律由表二中数据得：0.00.20.40.60.81.00.00.20.40.60.81.0YAxisTitleXAxisTitleBLinearFitofData3_BLinearRegressionforData2_B:Y=A+B*XParameterValueError------------------------------------------------------------A-0.002880.00927B0.912510.01429------------------------------------------------------------RSDNP------------------------------------------------------------0.999140.014769<0.0001-----------------...
