Title :
Mechanisms of waveguiding in femtosecond laser-structured LiNbO3
Author :
Burghoff, J. ; Nolte, S. ; Tünnermann, A.
Author_Institution :
Friedrich-Schiller-Univ. Jena, Jena
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;
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
DOI :
10.1109/CLEOE-IQEC.2007.4386266
