Open AccessRb/Ba side-diffused ridge waveguides in KTP
Author(s) -
Martin Völk,
Christian E. Rüter,
Detlef Kip
Publication year - 2017
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.019872
Subject(s) - materials science , wafer dicing , optics , perpendicular , ion , wavelength , waveguide , ridge , polarization (electrochemistry) , refractive index , second harmonic generation , optoelectronics , wafer , chemistry , laser , paleontology , physics , geometry , mathematics , organic chemistry , biology
We report on characterization of ridge waveguides fabricated in KTP (KTiOPO 4 ) by use of diamond-blade dicing and Rb/Ba ion exchange. The waveguides were prepared in substrates that have their z-axis in the surface plane, perpendicular to the waveguide direction. This hinders the RbBa ions from diffusion into the depth, as they are only mobile along the z-axis, and improves the waveguide's resistance against elevated temperature. Attenuation coefficients of 0.3 dB/cm (0.4 dB/cm) for TM (TE) polarization were measured at 1060 nm wavelength. Internal conversion efficiency of up to 3.3%/(W cm 2 ) was determined for type-II SHG of 1064 nm.