Polarization behavior of femtosecond laser written optical waveguides in Ti:Sapphire

Abstract : Ultrashort pulsed laser photoinscription of Ti:Sapphire crystals may result in the self-organization of nanoscale material redistribution regions in regular patterns within the laser trace and stress-induced birefringence around the laser trace. We report on the formation of anisotropic optical waveguides in Ti:Sapphire by a procedure that involves femtosecond laser inscription of adjacent nonguiding birefringent traces with nanopatterned crosssections and the accumulation of stress birefringence in the region between. Double parallel line structures with a separation of 25μm with vertical and horizontal nanoscale arrangements were written with a choice of orthogonal polarizations. Due to anisotropic light scattering on periodic nanostructures and stress-induced birefringence in the central zone, remarkable polarization dependent guiding effects were observed as a function of the microscopic geometry of the structures. Building on this polarization sensitivity, several structure such as 3 × 3 waveguide arrays, diamond and hexagon patterns are also investigated.
Document type :
Journal articles
Complete list of metadatas

https://hal-ujm.archives-ouvertes.fr/ujm-00710429
Contributor : Razvan Stoian <>
Submitted on : Wednesday, June 20, 2012 - 8:14:57 PM
Last modification on : Wednesday, July 25, 2018 - 2:05:30 PM

Identifiers

  • HAL Id : ujm-00710429, version 1

Collections

Citation

Jing Bai, Guanghua Cheng, Xuewen Long, Yishang Wang, Zhao Wei, et al.. Polarization behavior of femtosecond laser written optical waveguides in Ti:Sapphire. Optics Express, Optical Society of America, 2012, 20 (14), pp.15035. ⟨ujm-00710429⟩

Share

Metrics

Record views

242