In this work,a neural network(NN)method is developed for pulse duration inferring for an erbium-doped fiber laser at 1550 nm.Experime nt ally,the interferometric autocorrelation trace is observed clearly with the use ...In this work,a neural network(NN)method is developed for pulse duration inferring for an erbium-doped fiber laser at 1550 nm.Experime nt ally,the interferometric autocorrelation trace is observed clearly with the use of the two-photon absorption(TPA)effect in a GaAs photodiode.The intensity autocorrelation function is curvefitted by the NN with an appropriate performance,and the measuring accuracy is consistent with a commercial autocorrelator.Compared with the Levenberg-Marquardt curve-fitting method,the NN can retrieve the intensity autocorrelation function more stably and has a certain noise reduction ability,simplifying the signal processing for a TPA photodiode-based autocorrelator.展开更多
基金the Public Security Theory and Soft Science Research Project(No.2020LLYJSL JY040)the Fundamental Research Funds for the Central Universities(No.LGYB202003).
文摘In this work,a neural network(NN)method is developed for pulse duration inferring for an erbium-doped fiber laser at 1550 nm.Experime nt ally,the interferometric autocorrelation trace is observed clearly with the use of the two-photon absorption(TPA)effect in a GaAs photodiode.The intensity autocorrelation function is curvefitted by the NN with an appropriate performance,and the measuring accuracy is consistent with a commercial autocorrelator.Compared with the Levenberg-Marquardt curve-fitting method,the NN can retrieve the intensity autocorrelation function more stably and has a certain noise reduction ability,simplifying the signal processing for a TPA photodiode-based autocorrelator.