Spatially resolved measurement of femtosecond laser induced refractive index changes in transparent materials |
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| Authors: | René Berlich Jiyeon Choi Clarisse Mazuir Winston V Schoenfeld Stefan Nolte Martin Richardson |
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| Affiliation: | Townes Laser Institute, College of Optics and Photonics, University of Central Florida, 4000 Central Florida Boulevard, Orlando, Florida 32816, USA. |
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| Abstract: | We present a practical method to determine femtosecond laser induced refractive index changes in transparent materials. Based on an iterative Fourier transform algorithm, this technique spatially resolves the refractive index of complex structures by combining the dimensions of the modified region with the corresponding phase change extracted from far-field intensity measurements. This approach is used to characterize optical waveguides written by a femtosecond laser in borosilicate glass. |
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