1 550 nm光预准直模块研制与发散角测量的实验
Fabrication of collimating module and measurement of far field divergence of laser beam of 1 550 nm
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摘要: 对高斯光束的准直进行了理论分析，用干涉法检测所制作的准直透镜的波像差，达到了精密光学系统像质的要求。组装实验系统装置进行实验数据测量与处理，利用光功率计测量得到最大光功率一半处所对应的光斑尺寸，能确定出激光远场发散角。实验测得最大光功率后平均值为27.89 nW，光斑半径之差的平均值为6.33 mm，算得光束最小发散角为0.315 mrad，从而验证了准直系统能达到所需0.4 mrad的技术指标。Abstract: Theory analysis of the collimation about Gaussian light beam is described and the designed collimating lens have achieved the technique target in wavefront aberration by intervention measurement. The experimental data are measured by the designed experimental installation system and are processed by Gaussian power distributing curve, the spot size corresponding to half of the maximum light power is measured by the light power meter, which is used to determine the far field divergence angle of laser beam. In the experiment, average of the measured maximal light power is 27.89 nW and average of the spot size difference is 6.33 mm. Therefore, minimal far-field divergence angle of the laser beam is 0.315 mrad. The collimation system of the experiment is validated and it can reduce far field di
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