Abstract

We investigate the determination of nonlinear refractive index $n_2$, based on solving the transport of intensity equation (TIE) in conjunction with a pump–probe technique. As the pump and probe beams propagate through a sample, the pump-induced refractive index variations in the sample change the phase distribution of the probe beam. Using two recorded probe intensities in TIE, this phase change is derived, and so the nonlinear refractive index $n_2$ is obtained. The influence of some characteristics of the pump beam and noise on the accuracy of determining $n_2$ is also investigated. The simulation results show that the proposed method has a good capability for determining the nonlinear refractive index of materials.

© 2014 Optical Society of America

Determination of nonlinear refractive index by an iterative phase retrieval method

Roghayeh Yazdani and Hamidreza Fallah
Appl. Opt. 59(33) 10618-10625 (2020)

Recursive method for phase retrieval using transport of intensity and its applications

Mahmudunnabi Basunia, Partha P. Banerjee, Ujitha Abeywickrema, Ting-Chung Poon, and Hongbo Zhang
Appl. Opt. 55(33) 9546-9554 (2016)

Optimum plane selection for transport-of-intensity-equation-based solvers

J. Martinez-Carranza, K. Falaggis, and T. Kozacki
Appl. Opt. 53(30) 7050-7058 (2014)

Boundary-artifact-free phase retrieval with the transport of intensity equation II: applications to microlens characterization

Chao Zuo, Qian Chen, Hongru Li, Weijuan Qu, and Anand Asundi
Opt. Express 22(15) 18310-18324 (2014)

Optical convolution for quantitative phase retrieval using the transport of intensity equation

Tonmoy Chakraborty and Jonathan C. Petruccelli
Appl. Opt. 57(1) A134-A141 (2018)