Mechanisms of waveguiding in femtosecond laser-structured LiNbO3

Author

Burghoff, J. ; Nolte, S. ; Tünnermann, A.

Author_Institution

Friedrich-Schiller-Univ. Jena, Jena

fYear

2007

fDate

17-22 June 2007

Firstpage

1

Lastpage

1

Abstract

Two types of waveguiding have been observed in LiNbO₃. Both types of waveguides can be understood based on an analysis of the structural changes of the crystal. Here, waveguiding has been observed at the sides of the modification similar to structures in crystalline quartz. This can be explained by a volume change of the irradiated region and subsequent stress-induced birefringence in the surrounding crystal. Therefore, a model was developed to estimate the change of the focal volume upon irradiation. Based on this, finite element simulations of the resulting stress distribution in the crystalline lattice were carried out. The results illustrate the influence of the modification shape on the guiding properties.

Keywords

high-speed optical techniques; laser materials processing; lithium compounds; optical fabrication; optical materials; optical waveguides; LiNbO₃; crystalline quartz; femtosecond laser-structured LiNbO₃; finite element simulations; stress-induced birefringence; waveguiding; Crystallization; Frequency conversion; Laser modes; Lasers and electrooptics; Nonlinear optics; Optical materials; Optical pulses; Optical waveguides; Ultrafast optics; Waveguide lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on

Conference_Location

Munich

Print_ISBN

978-1-4244-0931-0

Electronic_ISBN

978-1-4244-0931-0

Type

conf

DOI

10.1109/CLEOE-IQEC.2007.4386266

Filename

4386266