CAJ | 학술논문

为了测量 K9玻璃的折射率，采用三次谐波法，通过调节位移平台使两束平行飞秒激光脉冲在时空上重合，进而产生强烈的三次谐波信号，并进行了理论分析和实验验证，对放入样品前后的实验数据进行处理，得到了样品 K9柱面镜的折射率及其测量精度，还对两片折射率未知的衰减片进行了测量，得到了它们的折射率。结果表明，测得的样品折射率与实际折射率符合得很好，证实了该方法测量物体线性折射率的可行性；与传统测量方法相比，该方法具有操作简便、样品容易加工的优点，对样品折射率范围没有限制，具有很重要的实用价值。
위료측량 K9파리적절사솔，채용삼차해파법，통과조절위이평태사량속평행비초격광맥충재시공상중합，진이산생강렬적삼차해파신호，병진행료이론분석화실험험증，대방입양품전후적실험수거진행처리，득도료양품 K9주면경적절사솔급기측량정도，환대량편절사솔미지적쇠감편진행료측량，득도료타문적절사솔。결과표명，측득적양품절사솔여실제절사솔부합득흔호，증실료해방법측량물체선성절사솔적가행성；여전통측량방법상비，해방법구유조작간편、양품용역가공적우점，대양품절사솔범위몰유한제，구유흔중요적실용개치。
The refractive index of K9 glass was measured with the third-order harmonic technique,in which two parallel femtosecond laser beams with equal energy were involved.In addition,theoretical analysis and experimental verification were performed,and the refractive index of K9 cylindrical mirror and the measurement accuray were obtained by processing the experimental data before and after putting the sample into the light path.Furthermore,the refractive index of two pieces of attenuators has also been measured.It turned out that the measured refractive index of the sample was in good agreement with the actual data,which verified the validity of this technique to measure the linear refractive index of materials.Compared with the traditional measuring methods,this technique can be operated simply,which has no limit on the range of the refractive index,and the sample is processed easily.Thus,the method of third-order harmonic has very important practical value.