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Measurement of the Nonlinear Refractive Index of LiNb03 by Z-scan Technique

Corresponding Author : S. M. Sharif (sharif-phy@sust.edu)

Authors : S. M. G. Rabbani , S. M. Sharif , Y. Haque , S. K. Das , N. Chawdhury

Keywords : Nonlinear refractive, LiNb03, Z-scan Technique

Abstract :

Nonlinear refractive index, n of an undoped z-cut photorefractive LiNbO3 crystal has been investigated here by the Z-scan technique using a continuous wave (cw) laser beam from a multiline argon-ion laser. Here both the sign and magnitude of the measured n are considerably different from the reported z-scan result in LiNbO3 obtained with picoseconds pulsed laser at 532 nm but in good agreement with other reported value with a cw laser beam at 514 nm. In the present work, the Z-scan measurement shows that LiNbO3 has a negative nonlinear refractive index and its magnitude is 0.67×10-7 cm2W-1 at the wavelength of 514 nm.  

Published on December 31st, 2011 in Volume 16, Issue 1, Applied Sciences and Technology