摘要
随着激光技术的快速发展,激光光源在光谱辐射和光学特性测量中得到了广泛的应用。与传统的灯光源相比,激光光源具有高功率、宽光谱和极低的波长不确定度等优点。建立了一套基于宽波段可调谐激光光源的光电探测器响应定标装置,其中激光光源的光谱覆盖范围为190 nm^4000 nm,激光脉冲宽度约130 fs,重复频率约80 MHz。为了避免高峰值功率脉冲光对探测器定标的影响并提高测量的线性度,利用光纤的固有特性成功研制了一种可将脉冲光转换成连续光的转换器。同时基于激光光源搭建了一套激光准直和扩束光路,在波长λ=550 nm时得到了非均匀性为0.29%的单色均匀辐射场。该单色均匀辐射场在高精度的探测器定标应用中具有重要的作用,围绕其搭建的定标测量装置在计量领域具有一定的参考价值。
With the rapid development of laser technology,laser sources have been widely applied in the measurement of spectral radiation and optical properties.Compared with the traditional light sources,laser sources have the advantages of high power,wide spectrum and extremely low wavelength uncertainty.A set of photodetector response calibration device based on the wide-band tunable laser light source was established,in which the spectral coverage of the laser light source was 190 nm^4000 nm,the laser pulse width was about 130 fs,and the repetition frequency was about 80 MHz.In order to avoid the impact of high peak power pulsed light on the calibration of the detector,and improve the linearity of the measurement,a converter of converting pulsed light to continuous light was successfully developed by using the inherent characteristics of the optical fiber.At the same time,a set of laser collimation and beam expansion optical paths was built based on the laser source,and a monochromatic uniform radiation field with an inhomogeneity of 0.29%was obtained at a wavelength ofλ=550 nm.The monochromatic uniform radiation field plays an important role in the application of high-precision detector calibration,and the calibration measuring device based on it has a positive significance in the field of metrology.
作者
王卫敏
赫英威
徐以诺
徐楠
井绪峰
刘想靓
傅杨挺
甘海勇
WANG Weimin;HE Yingwei;XU Yinuo;XU Nan;JING Xufeng;LIU Xiangliang;FU Yangting;GAN Haiyong(Optics and Laser Division,National Institute of Metrology,Beijing 100029,China;School of Optics and Electronics Technology,China Jiliang University,Hangzhou 310018,China)
出处
《应用光学》
CAS
CSCD
北大核心
2020年第4期717-722,共6页
Journal of Applied Optics
基金
国家重点研究开发计划(2017YFF0206103)
国家国际科技合作专项项目(2015DFA60390)
中国计量科学研究院科研项目(AKY1602,AKYZD1909)。
关键词
可调谐激光
光学特性
光谱辐射
光电探测器
tunable laser
optical properties
spectral radiation
photodetector
