title: Ti-free optical waveguiding regions produced by LiNbO3 etching during the indiffusion of Ti.
abstract: We report the observation, first to our knowledge, of optical waveguiding found beneath trenches etched in congruent lithium niobate using the recently reported etching during the indiffusion of Ti process. Observations of multi-mode and single-mode guiding at visible wavelengths and preliminary measurements of waveguide insertion losses are presented.
authors.affiliation: School of Electrical and Computer Engineering, RMIT University, Centre for Ultrahigh-Bandwidth Devices for Optical Systems (CUDOS), Melbourne, Victoria, Australia. tristan.crasto@student.rmit.edu.au
authors.forename: Tristan D
authors.initials: TD
authors.lastname: Crasto
authors.forename: Vijay
authors.initials: V
authors.lastname: Sivan
authors.forename: Thach G
authors.initials: TG
authors.lastname: Nguyen
authors.forename: Arnan
authors.initials: A
authors.lastname: Mitchell